parquet/

format.rs

//! See [`crate::file`] for easier to use APIs.
// Autogenerated by Thrift Compiler (0.20.0)
// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING

#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(unused_extern_crates)]
#![allow(clippy::too_many_arguments, clippy::type_complexity, clippy::vec_box, clippy::wrong_self_convention)]
// Fix unexpected `cfg` condition name: `rustfmt` https://github.com/apache/arrow-rs/issues/5725
//#![cfg_attr(rustfmt, rustfmt_skip)]

use std::cell::RefCell;
use std::collections::{BTreeMap, BTreeSet};
use std::convert::{From, TryFrom};
use std::default::Default;
use std::error::Error;
use std::fmt;
use std::fmt::{Display, Formatter};
use std::rc::Rc;

use thrift::OrderedFloat;
use thrift::{ApplicationError, ApplicationErrorKind, ProtocolError, ProtocolErrorKind, TThriftClient};
use thrift::protocol::{TFieldIdentifier, TListIdentifier, TMapIdentifier, TMessageIdentifier, TMessageType, TInputProtocol, TOutputProtocol, TSerializable, TSetIdentifier, TStructIdentifier, TType};
use thrift::protocol::field_id;
use thrift::protocol::verify_expected_message_type;
use thrift::protocol::verify_expected_sequence_number;
use thrift::protocol::verify_expected_service_call;
use thrift::protocol::verify_required_field_exists;

/// Types supported by Parquet.  These types are intended to be used in combination
/// with the encodings to control the on disk storage format.
/// For example INT16 is not included as a type since a good encoding of INT32
/// would handle this.
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct Type(pub i32);

impl Type {
  pub const BOOLEAN: Type = Type(0);
  pub const INT32: Type = Type(1);
  pub const INT64: Type = Type(2);
  pub const INT96: Type = Type(3);
  pub const FLOAT: Type = Type(4);
  pub const DOUBLE: Type = Type(5);
  pub const BYTE_ARRAY: Type = Type(6);
  pub const FIXED_LEN_BYTE_ARRAY: Type = Type(7);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::BOOLEAN,
    Self::INT32,
    Self::INT64,
    Self::INT96,
    Self::FLOAT,
    Self::DOUBLE,
    Self::BYTE_ARRAY,
    Self::FIXED_LEN_BYTE_ARRAY,
  ];
}

impl crate::thrift::TSerializable for Type {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<Type> {
    let enum_value = i_prot.read_i32()?;
    Ok(Type::from(enum_value))
  }
}

impl From<i32> for Type {
  fn from(i: i32) -> Self {
    match i {
      0 => Type::BOOLEAN,
      1 => Type::INT32,
      2 => Type::INT64,
      3 => Type::INT96,
      4 => Type::FLOAT,
      5 => Type::DOUBLE,
      6 => Type::BYTE_ARRAY,
      7 => Type::FIXED_LEN_BYTE_ARRAY,
      _ => Type(i)
    }
  }
}

impl From<&i32> for Type {
  fn from(i: &i32) -> Self {
    Type::from(*i)
  }
}

impl From<Type> for i32 {
  fn from(e: Type) -> i32 {
    e.0
  }
}

impl From<&Type> for i32 {
  fn from(e: &Type) -> i32 {
    e.0
  }
}

/// DEPRECATED: Common types used by frameworks(e.g. hive, pig) using parquet.
/// ConvertedType is superseded by LogicalType.  This enum should not be extended.
/// 
/// See LogicalTypes.md for conversion between ConvertedType and LogicalType.
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ConvertedType(pub i32);

impl ConvertedType {
  /// a BYTE_ARRAY actually contains UTF8 encoded chars
  pub const UTF8: ConvertedType = ConvertedType(0);
  /// a map is converted as an optional field containing a repeated key/value pair
  pub const MAP: ConvertedType = ConvertedType(1);
  /// a key/value pair is converted into a group of two fields
  pub const MAP_KEY_VALUE: ConvertedType = ConvertedType(2);
  /// a list is converted into an optional field containing a repeated field for its
  /// values
  pub const LIST: ConvertedType = ConvertedType(3);
  /// an enum is converted into a BYTE_ARRAY field
  pub const ENUM: ConvertedType = ConvertedType(4);
  /// A decimal value.
  /// 
  /// This may be used to annotate BYTE_ARRAY or FIXED_LEN_BYTE_ARRAY primitive
  /// types. The underlying byte array stores the unscaled value encoded as two's
  /// complement using big-endian byte order (the most significant byte is the
  /// zeroth element). The value of the decimal is the value * 10^{-scale}.
  /// 
  /// This must be accompanied by a (maximum) precision and a scale in the
  /// SchemaElement. The precision specifies the number of digits in the decimal
  /// and the scale stores the location of the decimal point. For example 1.23
  /// would have precision 3 (3 total digits) and scale 2 (the decimal point is
  /// 2 digits over).
  pub const DECIMAL: ConvertedType = ConvertedType(5);
  /// A Date
  /// 
  /// Stored as days since Unix epoch, encoded as the INT32 physical type.
  /// 
  pub const DATE: ConvertedType = ConvertedType(6);
  /// A time
  /// 
  /// The total number of milliseconds since midnight.  The value is stored
  /// as an INT32 physical type.
  pub const TIME_MILLIS: ConvertedType = ConvertedType(7);
  /// A time.
  /// 
  /// The total number of microseconds since midnight.  The value is stored as
  /// an INT64 physical type.
  pub const TIME_MICROS: ConvertedType = ConvertedType(8);
  /// A date/time combination
  /// 
  /// Date and time recorded as milliseconds since the Unix epoch.  Recorded as
  /// a physical type of INT64.
  pub const TIMESTAMP_MILLIS: ConvertedType = ConvertedType(9);
  /// A date/time combination
  /// 
  /// Date and time recorded as microseconds since the Unix epoch.  The value is
  /// stored as an INT64 physical type.
  pub const TIMESTAMP_MICROS: ConvertedType = ConvertedType(10);
  /// An unsigned integer value.
  /// 
  /// The number describes the maximum number of meaningful data bits in
  /// the stored value. 8, 16 and 32 bit values are stored using the
  /// INT32 physical type.  64 bit values are stored using the INT64
  /// physical type.
  /// 
  pub const UINT_8: ConvertedType = ConvertedType(11);
  pub const UINT_16: ConvertedType = ConvertedType(12);
  pub const UINT_32: ConvertedType = ConvertedType(13);
  pub const UINT_64: ConvertedType = ConvertedType(14);
  /// A signed integer value.
  /// 
  /// The number describes the maximum number of meaningful data bits in
  /// the stored value. 8, 16 and 32 bit values are stored using the
  /// INT32 physical type.  64 bit values are stored using the INT64
  /// physical type.
  /// 
  pub const INT_8: ConvertedType = ConvertedType(15);
  pub const INT_16: ConvertedType = ConvertedType(16);
  pub const INT_32: ConvertedType = ConvertedType(17);
  pub const INT_64: ConvertedType = ConvertedType(18);
  /// An embedded JSON document
  /// 
  /// A JSON document embedded within a single UTF8 column.
  pub const JSON: ConvertedType = ConvertedType(19);
  /// An embedded BSON document
  /// 
  /// A BSON document embedded within a single BYTE_ARRAY column.
  pub const BSON: ConvertedType = ConvertedType(20);
  /// An interval of time
  /// 
  /// This type annotates data stored as a FIXED_LEN_BYTE_ARRAY of length 12
  /// This data is composed of three separate little endian unsigned
  /// integers.  Each stores a component of a duration of time.  The first
  /// integer identifies the number of months associated with the duration,
  /// the second identifies the number of days associated with the duration
  /// and the third identifies the number of milliseconds associated with
  /// the provided duration.  This duration of time is independent of any
  /// particular timezone or date.
  pub const INTERVAL: ConvertedType = ConvertedType(21);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::UTF8,
    Self::MAP,
    Self::MAP_KEY_VALUE,
    Self::LIST,
    Self::ENUM,
    Self::DECIMAL,
    Self::DATE,
    Self::TIME_MILLIS,
    Self::TIME_MICROS,
    Self::TIMESTAMP_MILLIS,
    Self::TIMESTAMP_MICROS,
    Self::UINT_8,
    Self::UINT_16,
    Self::UINT_32,
    Self::UINT_64,
    Self::INT_8,
    Self::INT_16,
    Self::INT_32,
    Self::INT_64,
    Self::JSON,
    Self::BSON,
    Self::INTERVAL,
  ];
}

impl crate::thrift::TSerializable for ConvertedType {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ConvertedType> {
    let enum_value = i_prot.read_i32()?;
    Ok(ConvertedType::from(enum_value))
  }
}

impl From<i32> for ConvertedType {
  fn from(i: i32) -> Self {
    match i {
      0 => ConvertedType::UTF8,
      1 => ConvertedType::MAP,
      2 => ConvertedType::MAP_KEY_VALUE,
      3 => ConvertedType::LIST,
      4 => ConvertedType::ENUM,
      5 => ConvertedType::DECIMAL,
      6 => ConvertedType::DATE,
      7 => ConvertedType::TIME_MILLIS,
      8 => ConvertedType::TIME_MICROS,
      9 => ConvertedType::TIMESTAMP_MILLIS,
      10 => ConvertedType::TIMESTAMP_MICROS,
      11 => ConvertedType::UINT_8,
      12 => ConvertedType::UINT_16,
      13 => ConvertedType::UINT_32,
      14 => ConvertedType::UINT_64,
      15 => ConvertedType::INT_8,
      16 => ConvertedType::INT_16,
      17 => ConvertedType::INT_32,
      18 => ConvertedType::INT_64,
      19 => ConvertedType::JSON,
      20 => ConvertedType::BSON,
      21 => ConvertedType::INTERVAL,
      _ => ConvertedType(i)
    }
  }
}

impl From<&i32> for ConvertedType {
  fn from(i: &i32) -> Self {
    ConvertedType::from(*i)
  }
}

impl From<ConvertedType> for i32 {
  fn from(e: ConvertedType) -> i32 {
    e.0
  }
}

impl From<&ConvertedType> for i32 {
  fn from(e: &ConvertedType) -> i32 {
    e.0
  }
}

/// Representation of Schemas
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct FieldRepetitionType(pub i32);

impl FieldRepetitionType {
  /// This field is required (can not be null) and each row has exactly 1 value.
  pub const REQUIRED: FieldRepetitionType = FieldRepetitionType(0);
  /// The field is optional (can be null) and each row has 0 or 1 values.
  pub const OPTIONAL: FieldRepetitionType = FieldRepetitionType(1);
  /// The field is repeated and can contain 0 or more values
  pub const REPEATED: FieldRepetitionType = FieldRepetitionType(2);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::REQUIRED,
    Self::OPTIONAL,
    Self::REPEATED,
  ];
}

impl crate::thrift::TSerializable for FieldRepetitionType {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<FieldRepetitionType> {
    let enum_value = i_prot.read_i32()?;
    Ok(FieldRepetitionType::from(enum_value))
  }
}

impl From<i32> for FieldRepetitionType {
  fn from(i: i32) -> Self {
    match i {
      0 => FieldRepetitionType::REQUIRED,
      1 => FieldRepetitionType::OPTIONAL,
      2 => FieldRepetitionType::REPEATED,
      _ => FieldRepetitionType(i)
    }
  }
}

impl From<&i32> for FieldRepetitionType {
  fn from(i: &i32) -> Self {
    FieldRepetitionType::from(*i)
  }
}

impl From<FieldRepetitionType> for i32 {
  fn from(e: FieldRepetitionType) -> i32 {
    e.0
  }
}

impl From<&FieldRepetitionType> for i32 {
  fn from(e: &FieldRepetitionType) -> i32 {
    e.0
  }
}

/// Encodings supported by Parquet.  Not all encodings are valid for all types.  These
/// enums are also used to specify the encoding of definition and repetition levels.
/// See the accompanying doc for the details of the more complicated encodings.
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct Encoding(pub i32);

impl Encoding {
  /// Default encoding.
  /// BOOLEAN - 1 bit per value. 0 is false; 1 is true.
  /// INT32 - 4 bytes per value.  Stored as little-endian.
  /// INT64 - 8 bytes per value.  Stored as little-endian.
  /// FLOAT - 4 bytes per value.  IEEE. Stored as little-endian.
  /// DOUBLE - 8 bytes per value.  IEEE. Stored as little-endian.
  /// BYTE_ARRAY - 4 byte length stored as little endian, followed by bytes.
  /// FIXED_LEN_BYTE_ARRAY - Just the bytes.
  pub const PLAIN: Encoding = Encoding(0);
  /// Deprecated: Dictionary encoding. The values in the dictionary are encoded in the
  /// plain type.
  /// in a data page use RLE_DICTIONARY instead.
  /// in a Dictionary page use PLAIN instead
  pub const PLAIN_DICTIONARY: Encoding = Encoding(2);
  /// Group packed run length encoding. Usable for definition/repetition levels
  /// encoding and Booleans (on one bit: 0 is false; 1 is true.)
  pub const RLE: Encoding = Encoding(3);
  /// Bit packed encoding.  This can only be used if the data has a known max
  /// width.  Usable for definition/repetition levels encoding.
  pub const BIT_PACKED: Encoding = Encoding(4);
  /// Delta encoding for integers. This can be used for int columns and works best
  /// on sorted data
  pub const DELTA_BINARY_PACKED: Encoding = Encoding(5);
  /// Encoding for byte arrays to separate the length values and the data. The lengths
  /// are encoded using DELTA_BINARY_PACKED
  pub const DELTA_LENGTH_BYTE_ARRAY: Encoding = Encoding(6);
  /// Incremental-encoded byte array. Prefix lengths are encoded using DELTA_BINARY_PACKED.
  /// Suffixes are stored as delta length byte arrays.
  pub const DELTA_BYTE_ARRAY: Encoding = Encoding(7);
  /// Dictionary encoding: the ids are encoded using the RLE encoding
  pub const RLE_DICTIONARY: Encoding = Encoding(8);
  /// Encoding for fixed-width data (FLOAT, DOUBLE, INT32, INT64, FIXED_LEN_BYTE_ARRAY).
  /// K byte-streams are created where K is the size in bytes of the data type.
  /// The individual bytes of a value are scattered to the corresponding stream and
  /// the streams are concatenated.
  /// This itself does not reduce the size of the data but can lead to better compression
  /// afterwards.
  /// 
  /// Added in 2.8 for FLOAT and DOUBLE.
  /// Support for INT32, INT64 and FIXED_LEN_BYTE_ARRAY added in 2.11.
  pub const BYTE_STREAM_SPLIT: Encoding = Encoding(9);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::PLAIN,
    Self::PLAIN_DICTIONARY,
    Self::RLE,
    Self::BIT_PACKED,
    Self::DELTA_BINARY_PACKED,
    Self::DELTA_LENGTH_BYTE_ARRAY,
    Self::DELTA_BYTE_ARRAY,
    Self::RLE_DICTIONARY,
    Self::BYTE_STREAM_SPLIT,
  ];
}

impl crate::thrift::TSerializable for Encoding {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<Encoding> {
    let enum_value = i_prot.read_i32()?;
    Ok(Encoding::from(enum_value))
  }
}

impl From<i32> for Encoding {
  fn from(i: i32) -> Self {
    match i {
      0 => Encoding::PLAIN,
      2 => Encoding::PLAIN_DICTIONARY,
      3 => Encoding::RLE,
      4 => Encoding::BIT_PACKED,
      5 => Encoding::DELTA_BINARY_PACKED,
      6 => Encoding::DELTA_LENGTH_BYTE_ARRAY,
      7 => Encoding::DELTA_BYTE_ARRAY,
      8 => Encoding::RLE_DICTIONARY,
      9 => Encoding::BYTE_STREAM_SPLIT,
      _ => Encoding(i)
    }
  }
}

impl From<&i32> for Encoding {
  fn from(i: &i32) -> Self {
    Encoding::from(*i)
  }
}

impl From<Encoding> for i32 {
  fn from(e: Encoding) -> i32 {
    e.0
  }
}

impl From<&Encoding> for i32 {
  fn from(e: &Encoding) -> i32 {
    e.0
  }
}

/// Supported compression algorithms.
/// 
/// Codecs added in format version X.Y can be read by readers based on X.Y and later.
/// Codec support may vary between readers based on the format version and
/// libraries available at runtime.
/// 
/// See Compression.md for a detailed specification of these algorithms.
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct CompressionCodec(pub i32);

impl CompressionCodec {
  pub const UNCOMPRESSED: CompressionCodec = CompressionCodec(0);
  pub const SNAPPY: CompressionCodec = CompressionCodec(1);
  pub const GZIP: CompressionCodec = CompressionCodec(2);
  pub const LZO: CompressionCodec = CompressionCodec(3);
  pub const BROTLI: CompressionCodec = CompressionCodec(4);
  pub const LZ4: CompressionCodec = CompressionCodec(5);
  pub const ZSTD: CompressionCodec = CompressionCodec(6);
  pub const LZ4_RAW: CompressionCodec = CompressionCodec(7);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::UNCOMPRESSED,
    Self::SNAPPY,
    Self::GZIP,
    Self::LZO,
    Self::BROTLI,
    Self::LZ4,
    Self::ZSTD,
    Self::LZ4_RAW,
  ];
}

impl crate::thrift::TSerializable for CompressionCodec {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<CompressionCodec> {
    let enum_value = i_prot.read_i32()?;
    Ok(CompressionCodec::from(enum_value))
  }
}

impl From<i32> for CompressionCodec {
  fn from(i: i32) -> Self {
    match i {
      0 => CompressionCodec::UNCOMPRESSED,
      1 => CompressionCodec::SNAPPY,
      2 => CompressionCodec::GZIP,
      3 => CompressionCodec::LZO,
      4 => CompressionCodec::BROTLI,
      5 => CompressionCodec::LZ4,
      6 => CompressionCodec::ZSTD,
      7 => CompressionCodec::LZ4_RAW,
      _ => CompressionCodec(i)
    }
  }
}

impl From<&i32> for CompressionCodec {
  fn from(i: &i32) -> Self {
    CompressionCodec::from(*i)
  }
}

impl From<CompressionCodec> for i32 {
  fn from(e: CompressionCodec) -> i32 {
    e.0
  }
}

impl From<&CompressionCodec> for i32 {
  fn from(e: &CompressionCodec) -> i32 {
    e.0
  }
}

#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct PageType(pub i32);

impl PageType {
  pub const DATA_PAGE: PageType = PageType(0);
  pub const INDEX_PAGE: PageType = PageType(1);
  pub const DICTIONARY_PAGE: PageType = PageType(2);
  pub const DATA_PAGE_V2: PageType = PageType(3);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::DATA_PAGE,
    Self::INDEX_PAGE,
    Self::DICTIONARY_PAGE,
    Self::DATA_PAGE_V2,
  ];
}

impl crate::thrift::TSerializable for PageType {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<PageType> {
    let enum_value = i_prot.read_i32()?;
    Ok(PageType::from(enum_value))
  }
}

impl From<i32> for PageType {
  fn from(i: i32) -> Self {
    match i {
      0 => PageType::DATA_PAGE,
      1 => PageType::INDEX_PAGE,
      2 => PageType::DICTIONARY_PAGE,
      3 => PageType::DATA_PAGE_V2,
      _ => PageType(i)
    }
  }
}

impl From<&i32> for PageType {
  fn from(i: &i32) -> Self {
    PageType::from(*i)
  }
}

impl From<PageType> for i32 {
  fn from(e: PageType) -> i32 {
    e.0
  }
}

impl From<&PageType> for i32 {
  fn from(e: &PageType) -> i32 {
    e.0
  }
}

/// Enum to annotate whether lists of min/max elements inside ColumnIndex
/// are ordered and if so, in which direction.
#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct BoundaryOrder(pub i32);

impl BoundaryOrder {
  pub const UNORDERED: BoundaryOrder = BoundaryOrder(0);
  pub const ASCENDING: BoundaryOrder = BoundaryOrder(1);
  pub const DESCENDING: BoundaryOrder = BoundaryOrder(2);
  pub const ENUM_VALUES: &'static [Self] = &[
    Self::UNORDERED,
    Self::ASCENDING,
    Self::DESCENDING,
  ];
}

impl crate::thrift::TSerializable for BoundaryOrder {
  #[allow(clippy::trivially_copy_pass_by_ref)]
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    o_prot.write_i32(self.0)
  }
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BoundaryOrder> {
    let enum_value = i_prot.read_i32()?;
    Ok(BoundaryOrder::from(enum_value))
  }
}

impl From<i32> for BoundaryOrder {
  fn from(i: i32) -> Self {
    match i {
      0 => BoundaryOrder::UNORDERED,
      1 => BoundaryOrder::ASCENDING,
      2 => BoundaryOrder::DESCENDING,
      _ => BoundaryOrder(i)
    }
  }
}

impl From<&i32> for BoundaryOrder {
  fn from(i: &i32) -> Self {
    BoundaryOrder::from(*i)
  }
}

impl From<BoundaryOrder> for i32 {
  fn from(e: BoundaryOrder) -> i32 {
    e.0
  }
}

impl From<&BoundaryOrder> for i32 {
  fn from(e: &BoundaryOrder) -> i32 {
    e.0
  }
}

//
// SizeStatistics
//

/// A structure for capturing metadata for estimating the unencoded,
/// uncompressed size of data written. This is useful for readers to estimate
/// how much memory is needed to reconstruct data in their memory model and for
/// fine grained filter pushdown on nested structures (the histograms contained
/// in this structure can help determine the number of nulls at a particular
/// nesting level and maximum length of lists).
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SizeStatistics {
  /// The number of physical bytes stored for BYTE_ARRAY data values assuming
  /// no encoding. This is exclusive of the bytes needed to store the length of
  /// each byte array. In other words, this field is equivalent to the `(size
  /// of PLAIN-ENCODING the byte array values) - (4 bytes * number of values
  /// written)`. To determine unencoded sizes of other types readers can use
  /// schema information multiplied by the number of non-null and null values.
  /// The number of null/non-null values can be inferred from the histograms
  /// below.
  /// 
  /// For example, if a column chunk is dictionary-encoded with dictionary
  /// ["a", "bc", "cde"], and a data page contains the indices [0, 0, 1, 2],
  /// then this value for that data page should be 7 (1 + 1 + 2 + 3).
  /// 
  /// This field should only be set for types that use BYTE_ARRAY as their
  /// physical type.
  pub unencoded_byte_array_data_bytes: Option<i64>,
  /// When present, there is expected to be one element corresponding to each
  /// repetition (i.e. size=max repetition_level+1) where each element
  /// represents the number of times the repetition level was observed in the
  /// data.
  /// 
  /// This field may be omitted if max_repetition_level is 0 without loss
  /// of information.
  /// 
  pub repetition_level_histogram: Option<Vec<i64>>,
  /// Same as repetition_level_histogram except for definition levels.
  /// 
  /// This field may be omitted if max_definition_level is 0 or 1 without
  /// loss of information.
  /// 
  pub definition_level_histogram: Option<Vec<i64>>,
}

impl SizeStatistics {
  pub fn new<F1, F2, F3>(unencoded_byte_array_data_bytes: F1, repetition_level_histogram: F2, definition_level_histogram: F3) -> SizeStatistics where F1: Into<Option<i64>>, F2: Into<Option<Vec<i64>>>, F3: Into<Option<Vec<i64>>> {
    SizeStatistics {
      unencoded_byte_array_data_bytes: unencoded_byte_array_data_bytes.into(),
      repetition_level_histogram: repetition_level_histogram.into(),
      definition_level_histogram: definition_level_histogram.into(),
    }
  }
}

impl crate::thrift::TSerializable for SizeStatistics {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<SizeStatistics> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i64> = None;
    let mut f_2: Option<Vec<i64>> = None;
    let mut f_3: Option<Vec<i64>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i64()?;
          f_1 = Some(val);
        },
        2 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_0 = i_prot.read_i64()?;
            val.push(list_elem_0);
          }
          i_prot.read_list_end()?;
          f_2 = Some(val);
        },
        3 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_1 = i_prot.read_i64()?;
            val.push(list_elem_1);
          }
          i_prot.read_list_end()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = SizeStatistics {
      unencoded_byte_array_data_bytes: f_1,
      repetition_level_histogram: f_2,
      definition_level_histogram: f_3,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("SizeStatistics");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(fld_var) = self.unencoded_byte_array_data_bytes {
      o_prot.write_field_begin(&TFieldIdentifier::new("unencoded_byte_array_data_bytes", TType::I64, 1))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.repetition_level_histogram {
      o_prot.write_field_begin(&TFieldIdentifier::new("repetition_level_histogram", TType::List, 2))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.definition_level_histogram {
      o_prot.write_field_begin(&TFieldIdentifier::new("definition_level_histogram", TType::List, 3))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// Statistics
//

/// Statistics per row group and per page
/// All fields are optional.
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct Statistics {
  /// DEPRECATED: min and max value of the column. Use min_value and max_value.
  /// 
  /// Values are encoded using PLAIN encoding, except that variable-length byte
  /// arrays do not include a length prefix.
  /// 
  /// These fields encode min and max values determined by signed comparison
  /// only. New files should use the correct order for a column's logical type
  /// and store the values in the min_value and max_value fields.
  /// 
  /// To support older readers, these may be set when the column order is
  /// signed.
  pub max: Option<Vec<u8>>,
  pub min: Option<Vec<u8>>,
  /// count of null value in the column
  pub null_count: Option<i64>,
  /// count of distinct values occurring
  pub distinct_count: Option<i64>,
  /// Lower and upper bound values for the column, determined by its ColumnOrder.
  /// 
  /// These may be the actual minimum and maximum values found on a page or column
  /// chunk, but can also be (more compact) values that do not exist on a page or
  /// column chunk. For example, instead of storing "Blart Versenwald III", a writer
  /// may set min_value="B", max_value="C". Such more compact values must still be
  /// valid values within the column's logical type.
  /// 
  /// Values are encoded using PLAIN encoding, except that variable-length byte
  /// arrays do not include a length prefix.
  pub max_value: Option<Vec<u8>>,
  pub min_value: Option<Vec<u8>>,
  /// If true, max_value is the actual maximum value for a column
  pub is_max_value_exact: Option<bool>,
  /// If true, min_value is the actual minimum value for a column
  pub is_min_value_exact: Option<bool>,
}

impl Statistics {
  pub fn new<F1, F2, F3, F4, F5, F6, F7, F8>(max: F1, min: F2, null_count: F3, distinct_count: F4, max_value: F5, min_value: F6, is_max_value_exact: F7, is_min_value_exact: F8) -> Statistics where F1: Into<Option<Vec<u8>>>, F2: Into<Option<Vec<u8>>>, F3: Into<Option<i64>>, F4: Into<Option<i64>>, F5: Into<Option<Vec<u8>>>, F6: Into<Option<Vec<u8>>>, F7: Into<Option<bool>>, F8: Into<Option<bool>> {
    Statistics {
      max: max.into(),
      min: min.into(),
      null_count: null_count.into(),
      distinct_count: distinct_count.into(),
      max_value: max_value.into(),
      min_value: min_value.into(),
      is_max_value_exact: is_max_value_exact.into(),
      is_min_value_exact: is_min_value_exact.into(),
    }
  }
}

impl crate::thrift::TSerializable for Statistics {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<Statistics> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<u8>> = None;
    let mut f_2: Option<Vec<u8>> = None;
    let mut f_3: Option<i64> = None;
    let mut f_4: Option<i64> = None;
    let mut f_5: Option<Vec<u8>> = None;
    let mut f_6: Option<Vec<u8>> = None;
    let mut f_7: Option<bool> = None;
    let mut f_8: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_bytes()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bytes()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i64()?;
          f_3 = Some(val);
        },
        4 => {
          let val = i_prot.read_i64()?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_bytes()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_bytes()?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_bool()?;
          f_7 = Some(val);
        },
        8 => {
          let val = i_prot.read_bool()?;
          f_8 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = Statistics {
      max: f_1,
      min: f_2,
      null_count: f_3,
      distinct_count: f_4,
      max_value: f_5,
      min_value: f_6,
      is_max_value_exact: f_7,
      is_min_value_exact: f_8,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("Statistics");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(ref fld_var) = self.max {
      o_prot.write_field_begin(&TFieldIdentifier::new("max", TType::String, 1))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.min {
      o_prot.write_field_begin(&TFieldIdentifier::new("min", TType::String, 2))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.null_count {
      o_prot.write_field_begin(&TFieldIdentifier::new("null_count", TType::I64, 3))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.distinct_count {
      o_prot.write_field_begin(&TFieldIdentifier::new("distinct_count", TType::I64, 4))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.max_value {
      o_prot.write_field_begin(&TFieldIdentifier::new("max_value", TType::String, 5))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.min_value {
      o_prot.write_field_begin(&TFieldIdentifier::new("min_value", TType::String, 6))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.is_max_value_exact {
      o_prot.write_field_begin(&TFieldIdentifier::new("is_max_value_exact", TType::Bool, 7))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.is_min_value_exact {
      o_prot.write_field_begin(&TFieldIdentifier::new("is_min_value_exact", TType::Bool, 8))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// StringType
//

/// Empty structs to use as logical type annotations
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct StringType {
}

impl StringType {
  pub fn new() -> StringType {
    StringType {}
  }
}

impl crate::thrift::TSerializable for StringType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<StringType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = StringType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("StringType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// UUIDType
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct UUIDType {
}

impl UUIDType {
  pub fn new() -> UUIDType {
    UUIDType {}
  }
}

impl crate::thrift::TSerializable for UUIDType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<UUIDType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = UUIDType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("UUIDType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// MapType
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct MapType {
}

impl MapType {
  pub fn new() -> MapType {
    MapType {}
  }
}

impl crate::thrift::TSerializable for MapType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<MapType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = MapType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("MapType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ListType
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ListType {
}

impl ListType {
  pub fn new() -> ListType {
    ListType {}
  }
}

impl crate::thrift::TSerializable for ListType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ListType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = ListType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ListType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// EnumType
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct EnumType {
}

impl EnumType {
  pub fn new() -> EnumType {
    EnumType {}
  }
}

impl crate::thrift::TSerializable for EnumType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<EnumType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = EnumType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("EnumType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// DateType
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct DateType {
}

impl DateType {
  pub fn new() -> DateType {
    DateType {}
  }
}

impl crate::thrift::TSerializable for DateType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<DateType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = DateType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("DateType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// Float16Type
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct Float16Type {
}

impl Float16Type {
  pub fn new() -> Float16Type {
    Float16Type {}
  }
}

impl crate::thrift::TSerializable for Float16Type {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<Float16Type> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = Float16Type {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("Float16Type");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// NullType
//

/// Logical type to annotate a column that is always null.
/// 
/// Sometimes when discovering the schema of existing data, values are always
/// null and the physical type can't be determined. This annotation signals
/// the case where the physical type was guessed from all null values.
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct NullType {
}

impl NullType {
  pub fn new() -> NullType {
    NullType {}
  }
}

impl crate::thrift::TSerializable for NullType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<NullType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = NullType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("NullType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// DecimalType
//

/// Decimal logical type annotation
/// 
/// Scale must be zero or a positive integer less than or equal to the precision.
/// Precision must be a non-zero positive integer.
/// 
/// To maintain forward-compatibility in v1, implementations using this logical
/// type must also set scale and precision on the annotated SchemaElement.
/// 
/// Allowed for physical types: INT32, INT64, FIXED_LEN_BYTE_ARRAY, and BYTE_ARRAY.
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct DecimalType {
  pub scale: i32,
  pub precision: i32,
}

impl DecimalType {
  pub fn new(scale: i32, precision: i32) -> DecimalType {
    DecimalType {
      scale,
      precision,
    }
  }
}

impl crate::thrift::TSerializable for DecimalType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<DecimalType> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<i32> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i32()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("DecimalType.scale", &f_1)?;
    verify_required_field_exists("DecimalType.precision", &f_2)?;
    let ret = DecimalType {
      scale: f_1.expect("auto-generated code should have checked for presence of required fields"),
      precision: f_2.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("DecimalType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("scale", TType::I32, 1))?;
    o_prot.write_i32(self.scale)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("precision", TType::I32, 2))?;
    o_prot.write_i32(self.precision)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// MilliSeconds
//

/// Time units for logical types
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct MilliSeconds {
}

impl MilliSeconds {
  pub fn new() -> MilliSeconds {
    MilliSeconds {}
  }
}

impl crate::thrift::TSerializable for MilliSeconds {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<MilliSeconds> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = MilliSeconds {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("MilliSeconds");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// MicroSeconds
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct MicroSeconds {
}

impl MicroSeconds {
  pub fn new() -> MicroSeconds {
    MicroSeconds {}
  }
}

impl crate::thrift::TSerializable for MicroSeconds {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<MicroSeconds> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = MicroSeconds {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("MicroSeconds");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// NanoSeconds
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct NanoSeconds {
}

impl NanoSeconds {
  pub fn new() -> NanoSeconds {
    NanoSeconds {}
  }
}

impl crate::thrift::TSerializable for NanoSeconds {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<NanoSeconds> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = NanoSeconds {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("NanoSeconds");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// TimeUnit
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum TimeUnit {
  MILLIS(MilliSeconds),
  MICROS(MicroSeconds),
  NANOS(NanoSeconds),
}

impl crate::thrift::TSerializable for TimeUnit {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<TimeUnit> {
    let mut ret: Option<TimeUnit> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = MilliSeconds::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(TimeUnit::MILLIS(val));
          }
          received_field_count += 1;
        },
        2 => {
          let val = MicroSeconds::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(TimeUnit::MICROS(val));
          }
          received_field_count += 1;
        },
        3 => {
          let val = NanoSeconds::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(TimeUnit::NANOS(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote TimeUnit"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote TimeUnit"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("TimeUnit");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      TimeUnit::MILLIS(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("MILLIS", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      TimeUnit::MICROS(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("MICROS", TType::Struct, 2))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      TimeUnit::NANOS(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("NANOS", TType::Struct, 3))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// TimestampType
//

/// Timestamp logical type annotation
/// 
/// Allowed for physical types: INT64
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct TimestampType {
  pub is_adjusted_to_u_t_c: bool,
  pub unit: TimeUnit,
}

impl TimestampType {
  pub fn new(is_adjusted_to_u_t_c: bool, unit: TimeUnit) -> TimestampType {
    TimestampType {
      is_adjusted_to_u_t_c,
      unit,
    }
  }
}

impl crate::thrift::TSerializable for TimestampType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<TimestampType> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<bool> = None;
    let mut f_2: Option<TimeUnit> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_bool()?;
          f_1 = Some(val);
        },
        2 => {
          let val = TimeUnit::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("TimestampType.is_adjusted_to_u_t_c", &f_1)?;
    verify_required_field_exists("TimestampType.unit", &f_2)?;
    let ret = TimestampType {
      is_adjusted_to_u_t_c: f_1.expect("auto-generated code should have checked for presence of required fields"),
      unit: f_2.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("TimestampType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("isAdjustedToUTC", TType::Bool, 1))?;
    o_prot.write_bool(self.is_adjusted_to_u_t_c)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("unit", TType::Struct, 2))?;
    self.unit.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// TimeType
//

/// Time logical type annotation
/// 
/// Allowed for physical types: INT32 (millis), INT64 (micros, nanos)
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct TimeType {
  pub is_adjusted_to_u_t_c: bool,
  pub unit: TimeUnit,
}

impl TimeType {
  pub fn new(is_adjusted_to_u_t_c: bool, unit: TimeUnit) -> TimeType {
    TimeType {
      is_adjusted_to_u_t_c,
      unit,
    }
  }
}

impl crate::thrift::TSerializable for TimeType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<TimeType> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<bool> = None;
    let mut f_2: Option<TimeUnit> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_bool()?;
          f_1 = Some(val);
        },
        2 => {
          let val = TimeUnit::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("TimeType.is_adjusted_to_u_t_c", &f_1)?;
    verify_required_field_exists("TimeType.unit", &f_2)?;
    let ret = TimeType {
      is_adjusted_to_u_t_c: f_1.expect("auto-generated code should have checked for presence of required fields"),
      unit: f_2.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("TimeType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("isAdjustedToUTC", TType::Bool, 1))?;
    o_prot.write_bool(self.is_adjusted_to_u_t_c)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("unit", TType::Struct, 2))?;
    self.unit.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// IntType
//

/// Integer logical type annotation
/// 
/// bitWidth must be 8, 16, 32, or 64.
/// 
/// Allowed for physical types: INT32, INT64
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct IntType {
  pub bit_width: i8,
  pub is_signed: bool,
}

impl IntType {
  pub fn new(bit_width: i8, is_signed: bool) -> IntType {
    IntType {
      bit_width,
      is_signed,
    }
  }
}

impl crate::thrift::TSerializable for IntType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<IntType> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i8> = None;
    let mut f_2: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i8()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bool()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("IntType.bit_width", &f_1)?;
    verify_required_field_exists("IntType.is_signed", &f_2)?;
    let ret = IntType {
      bit_width: f_1.expect("auto-generated code should have checked for presence of required fields"),
      is_signed: f_2.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("IntType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("bitWidth", TType::I08, 1))?;
    o_prot.write_i8(self.bit_width)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("isSigned", TType::Bool, 2))?;
    o_prot.write_bool(self.is_signed)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// JsonType
//

/// Embedded JSON logical type annotation
/// 
/// Allowed for physical types: BYTE_ARRAY
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct JsonType {
}

impl JsonType {
  pub fn new() -> JsonType {
    JsonType {}
  }
}

impl crate::thrift::TSerializable for JsonType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<JsonType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = JsonType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("JsonType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// BsonType
//

/// Embedded BSON logical type annotation
/// 
/// Allowed for physical types: BYTE_ARRAY
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct BsonType {
}

impl BsonType {
  pub fn new() -> BsonType {
    BsonType {}
  }
}

impl crate::thrift::TSerializable for BsonType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BsonType> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = BsonType {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("BsonType");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// LogicalType
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum LogicalType {
  STRING(StringType),
  MAP(MapType),
  LIST(ListType),
  ENUM(EnumType),
  DECIMAL(DecimalType),
  DATE(DateType),
  TIME(TimeType),
  TIMESTAMP(TimestampType),
  INTEGER(IntType),
  UNKNOWN(NullType),
  JSON(JsonType),
  BSON(BsonType),
  UUID(UUIDType),
  FLOAT16(Float16Type),
}

impl crate::thrift::TSerializable for LogicalType {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<LogicalType> {
    let mut ret: Option<LogicalType> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = StringType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::STRING(val));
          }
          received_field_count += 1;
        },
        2 => {
          let val = MapType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::MAP(val));
          }
          received_field_count += 1;
        },
        3 => {
          let val = ListType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::LIST(val));
          }
          received_field_count += 1;
        },
        4 => {
          let val = EnumType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::ENUM(val));
          }
          received_field_count += 1;
        },
        5 => {
          let val = DecimalType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::DECIMAL(val));
          }
          received_field_count += 1;
        },
        6 => {
          let val = DateType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::DATE(val));
          }
          received_field_count += 1;
        },
        7 => {
          let val = TimeType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::TIME(val));
          }
          received_field_count += 1;
        },
        8 => {
          let val = TimestampType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::TIMESTAMP(val));
          }
          received_field_count += 1;
        },
        10 => {
          let val = IntType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::INTEGER(val));
          }
          received_field_count += 1;
        },
        11 => {
          let val = NullType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::UNKNOWN(val));
          }
          received_field_count += 1;
        },
        12 => {
          let val = JsonType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::JSON(val));
          }
          received_field_count += 1;
        },
        13 => {
          let val = BsonType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::BSON(val));
          }
          received_field_count += 1;
        },
        14 => {
          let val = UUIDType::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::UUID(val));
          }
          received_field_count += 1;
        },
        15 => {
          let val = Float16Type::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(LogicalType::FLOAT16(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote LogicalType"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote LogicalType"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("LogicalType");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      LogicalType::STRING(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("STRING", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::MAP(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("MAP", TType::Struct, 2))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::LIST(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("LIST", TType::Struct, 3))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::ENUM(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("ENUM", TType::Struct, 4))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::DECIMAL(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("DECIMAL", TType::Struct, 5))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::DATE(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("DATE", TType::Struct, 6))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::TIME(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("TIME", TType::Struct, 7))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::TIMESTAMP(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("TIMESTAMP", TType::Struct, 8))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::INTEGER(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("INTEGER", TType::Struct, 10))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::UNKNOWN(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("UNKNOWN", TType::Struct, 11))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::JSON(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("JSON", TType::Struct, 12))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::BSON(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("BSON", TType::Struct, 13))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::UUID(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("UUID", TType::Struct, 14))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      LogicalType::FLOAT16(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("FLOAT16", TType::Struct, 15))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// SchemaElement
//

/// Represents a element inside a schema definition.
///
///  - if it is a group (inner node) then type is undefined and num_children
///    is defined
///  - if it is a primitive type (leaf) then type is defined and
///    num_children is undefined
///
/// Note the  nodes are listed in depth first traversal order.
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SchemaElement {
  /// Data type for this field. Not set if the current element is a non-leaf node
  pub type_: Option<Type>,
  /// If type is FIXED_LEN_BYTE_ARRAY, this is the byte length of the values.
  /// Otherwise, if specified, this is the maximum bit length to store any of the values.
  /// (e.g. a low cardinality INT col could have this set to 3).  Note that this is
  /// in the schema, and therefore fixed for the entire file.
  pub type_length: Option<i32>,
  /// repetition of the field. The root of the schema does not have a repetition_type.
  /// All other nodes must have one
  pub repetition_type: Option<FieldRepetitionType>,
  /// Name of the field in the schema
  pub name: String,
  /// Nested fields.  Since thrift does not support nested fields,
  /// the nesting is flattened to a single list by a depth-first traversal.
  /// The children count is used to construct the nested relationship.
  /// This field is not set when the element is a primitive type
  pub num_children: Option<i32>,
  /// DEPRECATED: When the schema is the result of a conversion from another model.
  /// Used to record the original type to help with cross conversion.
  /// 
  /// This is superseded by logicalType.
  pub converted_type: Option<ConvertedType>,
  /// DEPRECATED: Used when this column contains decimal data.
  /// See the DECIMAL converted type for more details.
  /// 
  /// This is superseded by using the DecimalType annotation in logicalType.
  pub scale: Option<i32>,
  pub precision: Option<i32>,
  /// When the original schema supports field ids, this will save the
  /// original field id in the parquet schema
  pub field_id: Option<i32>,
  /// The logical type of this SchemaElement
  /// 
  /// LogicalType replaces ConvertedType, but ConvertedType is still required
  /// for some logical types to ensure forward-compatibility in format v1.
  pub logical_type: Option<LogicalType>,
}

impl SchemaElement {
  pub fn new<F1, F2, F3, F5, F6, F7, F8, F9, F10>(type_: F1, type_length: F2, repetition_type: F3, name: String, num_children: F5, converted_type: F6, scale: F7, precision: F8, field_id: F9, logical_type: F10) -> SchemaElement where F1: Into<Option<Type>>, F2: Into<Option<i32>>, F3: Into<Option<FieldRepetitionType>>, F5: Into<Option<i32>>, F6: Into<Option<ConvertedType>>, F7: Into<Option<i32>>, F8: Into<Option<i32>>, F9: Into<Option<i32>>, F10: Into<Option<LogicalType>> {
    SchemaElement {
      type_: type_.into(),
      type_length: type_length.into(),
      repetition_type: repetition_type.into(),
      name,
      num_children: num_children.into(),
      converted_type: converted_type.into(),
      scale: scale.into(),
      precision: precision.into(),
      field_id: field_id.into(),
      logical_type: logical_type.into(),
    }
  }
}

impl crate::thrift::TSerializable for SchemaElement {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<SchemaElement> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Type> = None;
    let mut f_2: Option<i32> = None;
    let mut f_3: Option<FieldRepetitionType> = None;
    let mut f_4: Option<String> = None;
    let mut f_5: Option<i32> = None;
    let mut f_6: Option<ConvertedType> = None;
    let mut f_7: Option<i32> = None;
    let mut f_8: Option<i32> = None;
    let mut f_9: Option<i32> = None;
    let mut f_10: Option<LogicalType> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = Type::read_from_in_protocol(i_prot)?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i32()?;
          f_2 = Some(val);
        },
        3 => {
          let val = FieldRepetitionType::read_from_in_protocol(i_prot)?;
          f_3 = Some(val);
        },
        4 => {
          let val = i_prot.read_string()?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_i32()?;
          f_5 = Some(val);
        },
        6 => {
          let val = ConvertedType::read_from_in_protocol(i_prot)?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_i32()?;
          f_7 = Some(val);
        },
        8 => {
          let val = i_prot.read_i32()?;
          f_8 = Some(val);
        },
        9 => {
          let val = i_prot.read_i32()?;
          f_9 = Some(val);
        },
        10 => {
          let val = LogicalType::read_from_in_protocol(i_prot)?;
          f_10 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("SchemaElement.name", &f_4)?;
    let ret = SchemaElement {
      type_: f_1,
      type_length: f_2,
      repetition_type: f_3,
      name: f_4.expect("auto-generated code should have checked for presence of required fields"),
      num_children: f_5,
      converted_type: f_6,
      scale: f_7,
      precision: f_8,
      field_id: f_9,
      logical_type: f_10,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("SchemaElement");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(ref fld_var) = self.type_ {
      o_prot.write_field_begin(&TFieldIdentifier::new("type", TType::I32, 1))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.type_length {
      o_prot.write_field_begin(&TFieldIdentifier::new("type_length", TType::I32, 2))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.repetition_type {
      o_prot.write_field_begin(&TFieldIdentifier::new("repetition_type", TType::I32, 3))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_begin(&TFieldIdentifier::new("name", TType::String, 4))?;
    o_prot.write_string(&self.name)?;
    o_prot.write_field_end()?;
    if let Some(fld_var) = self.num_children {
      o_prot.write_field_begin(&TFieldIdentifier::new("num_children", TType::I32, 5))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.converted_type {
      o_prot.write_field_begin(&TFieldIdentifier::new("converted_type", TType::I32, 6))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.scale {
      o_prot.write_field_begin(&TFieldIdentifier::new("scale", TType::I32, 7))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.precision {
      o_prot.write_field_begin(&TFieldIdentifier::new("precision", TType::I32, 8))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.field_id {
      o_prot.write_field_begin(&TFieldIdentifier::new("field_id", TType::I32, 9))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.logical_type {
      o_prot.write_field_begin(&TFieldIdentifier::new("logicalType", TType::Struct, 10))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// DataPageHeader
//

/// Data page header
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct DataPageHeader {
  /// Number of values, including NULLs, in this data page.
  /// 
  /// If a OffsetIndex is present, a page must begin at a row
  /// boundary (repetition_level = 0). Otherwise, pages may begin
  /// within a row (repetition_level > 0).
  /// 
  pub num_values: i32,
  /// Encoding used for this data page *
  pub encoding: Encoding,
  /// Encoding used for definition levels *
  pub definition_level_encoding: Encoding,
  /// Encoding used for repetition levels *
  pub repetition_level_encoding: Encoding,
  /// Optional statistics for the data in this page *
  pub statistics: Option<Statistics>,
}

impl DataPageHeader {
  pub fn new<F5>(num_values: i32, encoding: Encoding, definition_level_encoding: Encoding, repetition_level_encoding: Encoding, statistics: F5) -> DataPageHeader where F5: Into<Option<Statistics>> {
    DataPageHeader {
      num_values,
      encoding,
      definition_level_encoding,
      repetition_level_encoding,
      statistics: statistics.into(),
    }
  }
}

impl crate::thrift::TSerializable for DataPageHeader {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<DataPageHeader> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<Encoding> = None;
    let mut f_3: Option<Encoding> = None;
    let mut f_4: Option<Encoding> = None;
    let mut f_5: Option<Statistics> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        3 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_3 = Some(val);
        },
        4 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_4 = Some(val);
        },
        5 => {
          let val = Statistics::read_from_in_protocol(i_prot)?;
          f_5 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("DataPageHeader.num_values", &f_1)?;
    verify_required_field_exists("DataPageHeader.encoding", &f_2)?;
    verify_required_field_exists("DataPageHeader.definition_level_encoding", &f_3)?;
    verify_required_field_exists("DataPageHeader.repetition_level_encoding", &f_4)?;
    let ret = DataPageHeader {
      num_values: f_1.expect("auto-generated code should have checked for presence of required fields"),
      encoding: f_2.expect("auto-generated code should have checked for presence of required fields"),
      definition_level_encoding: f_3.expect("auto-generated code should have checked for presence of required fields"),
      repetition_level_encoding: f_4.expect("auto-generated code should have checked for presence of required fields"),
      statistics: f_5,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("DataPageHeader");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_values", TType::I32, 1))?;
    o_prot.write_i32(self.num_values)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encoding", TType::I32, 2))?;
    self.encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("definition_level_encoding", TType::I32, 3))?;
    self.definition_level_encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("repetition_level_encoding", TType::I32, 4))?;
    self.repetition_level_encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.statistics {
      o_prot.write_field_begin(&TFieldIdentifier::new("statistics", TType::Struct, 5))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// IndexPageHeader
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct IndexPageHeader {
}

impl IndexPageHeader {
  pub fn new() -> IndexPageHeader {
    IndexPageHeader {}
  }
}

impl crate::thrift::TSerializable for IndexPageHeader {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<IndexPageHeader> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = IndexPageHeader {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("IndexPageHeader");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// DictionaryPageHeader
//

/// The dictionary page must be placed at the first position of the column chunk
/// if it is partly or completely dictionary encoded. At most one dictionary page
/// can be placed in a column chunk.
/// 
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct DictionaryPageHeader {
  /// Number of values in the dictionary *
  pub num_values: i32,
  /// Encoding using this dictionary page *
  pub encoding: Encoding,
  /// If true, the entries in the dictionary are sorted in ascending order *
  pub is_sorted: Option<bool>,
}

impl DictionaryPageHeader {
  pub fn new<F3>(num_values: i32, encoding: Encoding, is_sorted: F3) -> DictionaryPageHeader where F3: Into<Option<bool>> {
    DictionaryPageHeader {
      num_values,
      encoding,
      is_sorted: is_sorted.into(),
    }
  }
}

impl crate::thrift::TSerializable for DictionaryPageHeader {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<DictionaryPageHeader> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<Encoding> = None;
    let mut f_3: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_bool()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("DictionaryPageHeader.num_values", &f_1)?;
    verify_required_field_exists("DictionaryPageHeader.encoding", &f_2)?;
    let ret = DictionaryPageHeader {
      num_values: f_1.expect("auto-generated code should have checked for presence of required fields"),
      encoding: f_2.expect("auto-generated code should have checked for presence of required fields"),
      is_sorted: f_3,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("DictionaryPageHeader");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_values", TType::I32, 1))?;
    o_prot.write_i32(self.num_values)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encoding", TType::I32, 2))?;
    self.encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    if let Some(fld_var) = self.is_sorted {
      o_prot.write_field_begin(&TFieldIdentifier::new("is_sorted", TType::Bool, 3))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// DataPageHeaderV2
//

/// New page format allowing reading levels without decompressing the data
/// Repetition and definition levels are uncompressed
/// The remaining section containing the data is compressed if is_compressed is true
/// 
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct DataPageHeaderV2 {
  /// Number of values, including NULLs, in this data page. *
  pub num_values: i32,
  /// Number of NULL values, in this data page.
  /// Number of non-null = num_values - num_nulls which is also the number of values in the data section *
  pub num_nulls: i32,
  /// Number of rows in this data page. Every page must begin at a
  /// row boundary (repetition_level = 0): rows must **not** be
  /// split across page boundaries when using V2 data pages.
  /// 
  pub num_rows: i32,
  /// Encoding used for data in this page *
  pub encoding: Encoding,
  /// Length of the definition levels
  pub definition_levels_byte_length: i32,
  /// Length of the repetition levels
  pub repetition_levels_byte_length: i32,
  /// Whether the values are compressed.
  /// Which means the section of the page between
  /// definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included)
  /// is compressed with the compression_codec.
  /// If missing it is considered compressed
  pub is_compressed: Option<bool>,
  /// Optional statistics for the data in this page *
  pub statistics: Option<Statistics>,
}

impl DataPageHeaderV2 {
  pub fn new<F7, F8>(num_values: i32, num_nulls: i32, num_rows: i32, encoding: Encoding, definition_levels_byte_length: i32, repetition_levels_byte_length: i32, is_compressed: F7, statistics: F8) -> DataPageHeaderV2 where F7: Into<Option<bool>>, F8: Into<Option<Statistics>> {
    DataPageHeaderV2 {
      num_values,
      num_nulls,
      num_rows,
      encoding,
      definition_levels_byte_length,
      repetition_levels_byte_length,
      is_compressed: is_compressed.into(),
      statistics: statistics.into(),
    }
  }
}

impl crate::thrift::TSerializable for DataPageHeaderV2 {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<DataPageHeaderV2> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<i32> = None;
    let mut f_3: Option<i32> = None;
    let mut f_4: Option<Encoding> = None;
    let mut f_5: Option<i32> = None;
    let mut f_6: Option<i32> = None;
    let mut f_7: Option<bool> = None;
    let mut f_8: Option<Statistics> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i32()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i32()?;
          f_3 = Some(val);
        },
        4 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_i32()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_i32()?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_bool()?;
          f_7 = Some(val);
        },
        8 => {
          let val = Statistics::read_from_in_protocol(i_prot)?;
          f_8 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("DataPageHeaderV2.num_values", &f_1)?;
    verify_required_field_exists("DataPageHeaderV2.num_nulls", &f_2)?;
    verify_required_field_exists("DataPageHeaderV2.num_rows", &f_3)?;
    verify_required_field_exists("DataPageHeaderV2.encoding", &f_4)?;
    verify_required_field_exists("DataPageHeaderV2.definition_levels_byte_length", &f_5)?;
    verify_required_field_exists("DataPageHeaderV2.repetition_levels_byte_length", &f_6)?;
    let ret = DataPageHeaderV2 {
      num_values: f_1.expect("auto-generated code should have checked for presence of required fields"),
      num_nulls: f_2.expect("auto-generated code should have checked for presence of required fields"),
      num_rows: f_3.expect("auto-generated code should have checked for presence of required fields"),
      encoding: f_4.expect("auto-generated code should have checked for presence of required fields"),
      definition_levels_byte_length: f_5.expect("auto-generated code should have checked for presence of required fields"),
      repetition_levels_byte_length: f_6.expect("auto-generated code should have checked for presence of required fields"),
      is_compressed: f_7,
      statistics: f_8,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("DataPageHeaderV2");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_values", TType::I32, 1))?;
    o_prot.write_i32(self.num_values)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_nulls", TType::I32, 2))?;
    o_prot.write_i32(self.num_nulls)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_rows", TType::I32, 3))?;
    o_prot.write_i32(self.num_rows)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encoding", TType::I32, 4))?;
    self.encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("definition_levels_byte_length", TType::I32, 5))?;
    o_prot.write_i32(self.definition_levels_byte_length)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("repetition_levels_byte_length", TType::I32, 6))?;
    o_prot.write_i32(self.repetition_levels_byte_length)?;
    o_prot.write_field_end()?;
    if let Some(fld_var) = self.is_compressed {
      o_prot.write_field_begin(&TFieldIdentifier::new("is_compressed", TType::Bool, 7))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.statistics {
      o_prot.write_field_begin(&TFieldIdentifier::new("statistics", TType::Struct, 8))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// SplitBlockAlgorithm
//

/// Block-based algorithm type annotation. *
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SplitBlockAlgorithm {
}

impl SplitBlockAlgorithm {
  pub fn new() -> SplitBlockAlgorithm {
    SplitBlockAlgorithm {}
  }
}

impl crate::thrift::TSerializable for SplitBlockAlgorithm {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<SplitBlockAlgorithm> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = SplitBlockAlgorithm {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("SplitBlockAlgorithm");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// BloomFilterAlgorithm
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum BloomFilterAlgorithm {
  BLOCK(SplitBlockAlgorithm),
}

impl crate::thrift::TSerializable for BloomFilterAlgorithm {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BloomFilterAlgorithm> {
    let mut ret: Option<BloomFilterAlgorithm> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = SplitBlockAlgorithm::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(BloomFilterAlgorithm::BLOCK(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote BloomFilterAlgorithm"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote BloomFilterAlgorithm"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("BloomFilterAlgorithm");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      BloomFilterAlgorithm::BLOCK(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("BLOCK", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// XxHash
//

/// Hash strategy type annotation. xxHash is an extremely fast non-cryptographic hash
/// algorithm. It uses 64 bits version of xxHash.
/// 
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct XxHash {
}

impl XxHash {
  pub fn new() -> XxHash {
    XxHash {}
  }
}

impl crate::thrift::TSerializable for XxHash {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<XxHash> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = XxHash {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("XxHash");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// BloomFilterHash
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum BloomFilterHash {
  XXHASH(XxHash),
}

impl crate::thrift::TSerializable for BloomFilterHash {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BloomFilterHash> {
    let mut ret: Option<BloomFilterHash> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = XxHash::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(BloomFilterHash::XXHASH(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote BloomFilterHash"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote BloomFilterHash"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("BloomFilterHash");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      BloomFilterHash::XXHASH(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("XXHASH", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// Uncompressed
//

/// The compression used in the Bloom filter.
/// 
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct Uncompressed {
}

impl Uncompressed {
  pub fn new() -> Uncompressed {
    Uncompressed {}
  }
}

impl crate::thrift::TSerializable for Uncompressed {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<Uncompressed> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = Uncompressed {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("Uncompressed");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// BloomFilterCompression
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum BloomFilterCompression {
  UNCOMPRESSED(Uncompressed),
}

impl crate::thrift::TSerializable for BloomFilterCompression {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BloomFilterCompression> {
    let mut ret: Option<BloomFilterCompression> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = Uncompressed::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(BloomFilterCompression::UNCOMPRESSED(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote BloomFilterCompression"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote BloomFilterCompression"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("BloomFilterCompression");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      BloomFilterCompression::UNCOMPRESSED(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("UNCOMPRESSED", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// BloomFilterHeader
//

/// Bloom filter header is stored at beginning of Bloom filter data of each column
/// and followed by its bitset.
/// 
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct BloomFilterHeader {
  /// The size of bitset in bytes *
  pub num_bytes: i32,
  /// The algorithm for setting bits. *
  pub algorithm: BloomFilterAlgorithm,
  /// The hash function used for Bloom filter. *
  pub hash: BloomFilterHash,
  /// The compression used in the Bloom filter *
  pub compression: BloomFilterCompression,
}

impl BloomFilterHeader {
  pub fn new(num_bytes: i32, algorithm: BloomFilterAlgorithm, hash: BloomFilterHash, compression: BloomFilterCompression) -> BloomFilterHeader {
    BloomFilterHeader {
      num_bytes,
      algorithm,
      hash,
      compression,
    }
  }
}

impl crate::thrift::TSerializable for BloomFilterHeader {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<BloomFilterHeader> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<BloomFilterAlgorithm> = None;
    let mut f_3: Option<BloomFilterHash> = None;
    let mut f_4: Option<BloomFilterCompression> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = BloomFilterAlgorithm::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        3 => {
          let val = BloomFilterHash::read_from_in_protocol(i_prot)?;
          f_3 = Some(val);
        },
        4 => {
          let val = BloomFilterCompression::read_from_in_protocol(i_prot)?;
          f_4 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("BloomFilterHeader.num_bytes", &f_1)?;
    verify_required_field_exists("BloomFilterHeader.algorithm", &f_2)?;
    verify_required_field_exists("BloomFilterHeader.hash", &f_3)?;
    verify_required_field_exists("BloomFilterHeader.compression", &f_4)?;
    let ret = BloomFilterHeader {
      num_bytes: f_1.expect("auto-generated code should have checked for presence of required fields"),
      algorithm: f_2.expect("auto-generated code should have checked for presence of required fields"),
      hash: f_3.expect("auto-generated code should have checked for presence of required fields"),
      compression: f_4.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("BloomFilterHeader");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("numBytes", TType::I32, 1))?;
    o_prot.write_i32(self.num_bytes)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("algorithm", TType::Struct, 2))?;
    self.algorithm.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("hash", TType::Struct, 3))?;
    self.hash.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("compression", TType::Struct, 4))?;
    self.compression.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// PageHeader
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct PageHeader {
  /// the type of the page: indicates which of the *_header fields is set *
  pub type_: PageType,
  /// Uncompressed page size in bytes (not including this header) *
  pub uncompressed_page_size: i32,
  /// Compressed (and potentially encrypted) page size in bytes, not including this header *
  pub compressed_page_size: i32,
  /// The 32-bit CRC checksum for the page, to be be calculated as follows:
  /// 
  /// - The standard CRC32 algorithm is used (with polynomial 0x04C11DB7,
  ///   the same as in e.g. GZip).
  /// - All page types can have a CRC (v1 and v2 data pages, dictionary pages,
  ///   etc.).
  /// - The CRC is computed on the serialization binary representation of the page
  ///   (as written to disk), excluding the page header. For example, for v1
  ///   data pages, the CRC is computed on the concatenation of repetition levels,
  ///   definition levels and column values (optionally compressed, optionally
  ///   encrypted).
  /// - The CRC computation therefore takes place after any compression
  ///   and encryption steps, if any.
  /// 
  /// If enabled, this allows for disabling checksumming in HDFS if only a few
  /// pages need to be read.
  pub crc: Option<i32>,
  pub data_page_header: Option<DataPageHeader>,
  pub index_page_header: Option<IndexPageHeader>,
  pub dictionary_page_header: Option<DictionaryPageHeader>,
  pub data_page_header_v2: Option<DataPageHeaderV2>,
}

impl PageHeader {
  pub fn new<F4, F5, F6, F7, F8>(type_: PageType, uncompressed_page_size: i32, compressed_page_size: i32, crc: F4, data_page_header: F5, index_page_header: F6, dictionary_page_header: F7, data_page_header_v2: F8) -> PageHeader where F4: Into<Option<i32>>, F5: Into<Option<DataPageHeader>>, F6: Into<Option<IndexPageHeader>>, F7: Into<Option<DictionaryPageHeader>>, F8: Into<Option<DataPageHeaderV2>> {
    PageHeader {
      type_,
      uncompressed_page_size,
      compressed_page_size,
      crc: crc.into(),
      data_page_header: data_page_header.into(),
      index_page_header: index_page_header.into(),
      dictionary_page_header: dictionary_page_header.into(),
      data_page_header_v2: data_page_header_v2.into(),
    }
  }
}

impl crate::thrift::TSerializable for PageHeader {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<PageHeader> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<PageType> = None;
    let mut f_2: Option<i32> = None;
    let mut f_3: Option<i32> = None;
    let mut f_4: Option<i32> = None;
    let mut f_5: Option<DataPageHeader> = None;
    let mut f_6: Option<IndexPageHeader> = None;
    let mut f_7: Option<DictionaryPageHeader> = None;
    let mut f_8: Option<DataPageHeaderV2> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = PageType::read_from_in_protocol(i_prot)?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i32()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i32()?;
          f_3 = Some(val);
        },
        4 => {
          let val = i_prot.read_i32()?;
          f_4 = Some(val);
        },
        5 => {
          let val = DataPageHeader::read_from_in_protocol(i_prot)?;
          f_5 = Some(val);
        },
        6 => {
          let val = IndexPageHeader::read_from_in_protocol(i_prot)?;
          f_6 = Some(val);
        },
        7 => {
          let val = DictionaryPageHeader::read_from_in_protocol(i_prot)?;
          f_7 = Some(val);
        },
        8 => {
          let val = DataPageHeaderV2::read_from_in_protocol(i_prot)?;
          f_8 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("PageHeader.type_", &f_1)?;
    verify_required_field_exists("PageHeader.uncompressed_page_size", &f_2)?;
    verify_required_field_exists("PageHeader.compressed_page_size", &f_3)?;
    let ret = PageHeader {
      type_: f_1.expect("auto-generated code should have checked for presence of required fields"),
      uncompressed_page_size: f_2.expect("auto-generated code should have checked for presence of required fields"),
      compressed_page_size: f_3.expect("auto-generated code should have checked for presence of required fields"),
      crc: f_4,
      data_page_header: f_5,
      index_page_header: f_6,
      dictionary_page_header: f_7,
      data_page_header_v2: f_8,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("PageHeader");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("type", TType::I32, 1))?;
    self.type_.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("uncompressed_page_size", TType::I32, 2))?;
    o_prot.write_i32(self.uncompressed_page_size)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("compressed_page_size", TType::I32, 3))?;
    o_prot.write_i32(self.compressed_page_size)?;
    o_prot.write_field_end()?;
    if let Some(fld_var) = self.crc {
      o_prot.write_field_begin(&TFieldIdentifier::new("crc", TType::I32, 4))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.data_page_header {
      o_prot.write_field_begin(&TFieldIdentifier::new("data_page_header", TType::Struct, 5))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.index_page_header {
      o_prot.write_field_begin(&TFieldIdentifier::new("index_page_header", TType::Struct, 6))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.dictionary_page_header {
      o_prot.write_field_begin(&TFieldIdentifier::new("dictionary_page_header", TType::Struct, 7))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.data_page_header_v2 {
      o_prot.write_field_begin(&TFieldIdentifier::new("data_page_header_v2", TType::Struct, 8))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// KeyValue
//

/// Wrapper struct to store key values
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct KeyValue {
  pub key: String,
  pub value: Option<String>,
}

impl KeyValue {
  pub fn new<F2>(key: String, value: F2) -> KeyValue where F2: Into<Option<String>> {
    KeyValue {
      key,
      value: value.into(),
    }
  }
}

impl crate::thrift::TSerializable for KeyValue {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<KeyValue> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<String> = None;
    let mut f_2: Option<String> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_string()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_string()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("KeyValue.key", &f_1)?;
    let ret = KeyValue {
      key: f_1.expect("auto-generated code should have checked for presence of required fields"),
      value: f_2,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("KeyValue");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("key", TType::String, 1))?;
    o_prot.write_string(&self.key)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.value {
      o_prot.write_field_begin(&TFieldIdentifier::new("value", TType::String, 2))?;
      o_prot.write_string(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// SortingColumn
//

/// Sort order within a RowGroup of a leaf column
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SortingColumn {
  /// The ordinal position of the column (in this row group) *
  pub column_idx: i32,
  /// If true, indicates this column is sorted in descending order. *
  pub descending: bool,
  /// If true, nulls will come before non-null values, otherwise,
  /// nulls go at the end.
  pub nulls_first: bool,
}

impl SortingColumn {
  pub fn new(column_idx: i32, descending: bool, nulls_first: bool) -> SortingColumn {
    SortingColumn {
      column_idx,
      descending,
      nulls_first,
    }
  }
}

impl crate::thrift::TSerializable for SortingColumn {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<SortingColumn> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<bool> = None;
    let mut f_3: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bool()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_bool()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("SortingColumn.column_idx", &f_1)?;
    verify_required_field_exists("SortingColumn.descending", &f_2)?;
    verify_required_field_exists("SortingColumn.nulls_first", &f_3)?;
    let ret = SortingColumn {
      column_idx: f_1.expect("auto-generated code should have checked for presence of required fields"),
      descending: f_2.expect("auto-generated code should have checked for presence of required fields"),
      nulls_first: f_3.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("SortingColumn");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("column_idx", TType::I32, 1))?;
    o_prot.write_i32(self.column_idx)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("descending", TType::Bool, 2))?;
    o_prot.write_bool(self.descending)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("nulls_first", TType::Bool, 3))?;
    o_prot.write_bool(self.nulls_first)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// PageEncodingStats
//

/// statistics of a given page type and encoding
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct PageEncodingStats {
  /// the page type (data/dic/...) *
  pub page_type: PageType,
  /// encoding of the page *
  pub encoding: Encoding,
  /// number of pages of this type with this encoding *
  pub count: i32,
}

impl PageEncodingStats {
  pub fn new(page_type: PageType, encoding: Encoding, count: i32) -> PageEncodingStats {
    PageEncodingStats {
      page_type,
      encoding,
      count,
    }
  }
}

impl crate::thrift::TSerializable for PageEncodingStats {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<PageEncodingStats> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<PageType> = None;
    let mut f_2: Option<Encoding> = None;
    let mut f_3: Option<i32> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = PageType::read_from_in_protocol(i_prot)?;
          f_1 = Some(val);
        },
        2 => {
          let val = Encoding::read_from_in_protocol(i_prot)?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i32()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("PageEncodingStats.page_type", &f_1)?;
    verify_required_field_exists("PageEncodingStats.encoding", &f_2)?;
    verify_required_field_exists("PageEncodingStats.count", &f_3)?;
    let ret = PageEncodingStats {
      page_type: f_1.expect("auto-generated code should have checked for presence of required fields"),
      encoding: f_2.expect("auto-generated code should have checked for presence of required fields"),
      count: f_3.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("PageEncodingStats");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("page_type", TType::I32, 1))?;
    self.page_type.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encoding", TType::I32, 2))?;
    self.encoding.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("count", TType::I32, 3))?;
    o_prot.write_i32(self.count)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ColumnMetaData
//

/// Description for column metadata
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ColumnMetaData {
  /// Type of this column *
  pub type_: Type,
  /// Set of all encodings used for this column. The purpose is to validate
  /// whether we can decode those pages. *
  pub encodings: Vec<Encoding>,
  /// Path in schema *
  pub path_in_schema: Vec<String>,
  /// Compression codec *
  pub codec: CompressionCodec,
  /// Number of values in this column *
  pub num_values: i64,
  /// total byte size of all uncompressed pages in this column chunk (including the headers) *
  pub total_uncompressed_size: i64,
  /// total byte size of all compressed, and potentially encrypted, pages
  /// in this column chunk (including the headers) *
  pub total_compressed_size: i64,
  /// Optional key/value metadata *
  pub key_value_metadata: Option<Vec<KeyValue>>,
  /// Byte offset from beginning of file to first data page *
  pub data_page_offset: i64,
  /// Byte offset from beginning of file to root index page *
  pub index_page_offset: Option<i64>,
  /// Byte offset from the beginning of file to first (only) dictionary page *
  pub dictionary_page_offset: Option<i64>,
  /// optional statistics for this column chunk
  pub statistics: Option<Statistics>,
  /// Set of all encodings used for pages in this column chunk.
  /// This information can be used to determine if all data pages are
  /// dictionary encoded for example *
  pub encoding_stats: Option<Vec<PageEncodingStats>>,
  /// Byte offset from beginning of file to Bloom filter data. *
  pub bloom_filter_offset: Option<i64>,
  /// Size of Bloom filter data including the serialized header, in bytes.
  /// Added in 2.10 so readers may not read this field from old files and
  /// it can be obtained after the BloomFilterHeader has been deserialized.
  /// Writers should write this field so readers can read the bloom filter
  /// in a single I/O.
  pub bloom_filter_length: Option<i32>,
  /// Optional statistics to help estimate total memory when converted to in-memory
  /// representations. The histograms contained in these statistics can
  /// also be useful in some cases for more fine-grained nullability/list length
  /// filter pushdown.
  pub size_statistics: Option<SizeStatistics>,
}

impl ColumnMetaData {
  pub fn new<F8, F10, F11, F12, F13, F14, F15, F16>(type_: Type, encodings: Vec<Encoding>, path_in_schema: Vec<String>, codec: CompressionCodec, num_values: i64, total_uncompressed_size: i64, total_compressed_size: i64, key_value_metadata: F8, data_page_offset: i64, index_page_offset: F10, dictionary_page_offset: F11, statistics: F12, encoding_stats: F13, bloom_filter_offset: F14, bloom_filter_length: F15, size_statistics: F16) -> ColumnMetaData where F8: Into<Option<Vec<KeyValue>>>, F10: Into<Option<i64>>, F11: Into<Option<i64>>, F12: Into<Option<Statistics>>, F13: Into<Option<Vec<PageEncodingStats>>>, F14: Into<Option<i64>>, F15: Into<Option<i32>>, F16: Into<Option<SizeStatistics>> {
    ColumnMetaData {
      type_,
      encodings,
      path_in_schema,
      codec,
      num_values,
      total_uncompressed_size,
      total_compressed_size,
      key_value_metadata: key_value_metadata.into(),
      data_page_offset,
      index_page_offset: index_page_offset.into(),
      dictionary_page_offset: dictionary_page_offset.into(),
      statistics: statistics.into(),
      encoding_stats: encoding_stats.into(),
      bloom_filter_offset: bloom_filter_offset.into(),
      bloom_filter_length: bloom_filter_length.into(),
      size_statistics: size_statistics.into(),
    }
  }
}

impl crate::thrift::TSerializable for ColumnMetaData {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ColumnMetaData> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Type> = None;
    let mut f_2: Option<Vec<Encoding>> = None;
    let mut f_3: Option<Vec<String>> = None;
    let mut f_4: Option<CompressionCodec> = None;
    let mut f_5: Option<i64> = None;
    let mut f_6: Option<i64> = None;
    let mut f_7: Option<i64> = None;
    let mut f_8: Option<Vec<KeyValue>> = None;
    let mut f_9: Option<i64> = None;
    let mut f_10: Option<i64> = None;
    let mut f_11: Option<i64> = None;
    let mut f_12: Option<Statistics> = None;
    let mut f_13: Option<Vec<PageEncodingStats>> = None;
    let mut f_14: Option<i64> = None;
    let mut f_15: Option<i32> = None;
    let mut f_16: Option<SizeStatistics> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = Type::read_from_in_protocol(i_prot)?;
          f_1 = Some(val);
        },
        2 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<Encoding> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_2 = Encoding::read_from_in_protocol(i_prot)?;
            val.push(list_elem_2);
          }
          i_prot.read_list_end()?;
          f_2 = Some(val);
        },
        3 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<String> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_3 = i_prot.read_string()?;
            val.push(list_elem_3);
          }
          i_prot.read_list_end()?;
          f_3 = Some(val);
        },
        4 => {
          let val = CompressionCodec::read_from_in_protocol(i_prot)?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_i64()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_i64()?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_i64()?;
          f_7 = Some(val);
        },
        8 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<KeyValue> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_4 = KeyValue::read_from_in_protocol(i_prot)?;
            val.push(list_elem_4);
          }
          i_prot.read_list_end()?;
          f_8 = Some(val);
        },
        9 => {
          let val = i_prot.read_i64()?;
          f_9 = Some(val);
        },
        10 => {
          let val = i_prot.read_i64()?;
          f_10 = Some(val);
        },
        11 => {
          let val = i_prot.read_i64()?;
          f_11 = Some(val);
        },
        12 => {
          let val = Statistics::read_from_in_protocol(i_prot)?;
          f_12 = Some(val);
        },
        13 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<PageEncodingStats> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_5 = PageEncodingStats::read_from_in_protocol(i_prot)?;
            val.push(list_elem_5);
          }
          i_prot.read_list_end()?;
          f_13 = Some(val);
        },
        14 => {
          let val = i_prot.read_i64()?;
          f_14 = Some(val);
        },
        15 => {
          let val = i_prot.read_i32()?;
          f_15 = Some(val);
        },
        16 => {
          let val = SizeStatistics::read_from_in_protocol(i_prot)?;
          f_16 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("ColumnMetaData.type_", &f_1)?;
    verify_required_field_exists("ColumnMetaData.encodings", &f_2)?;
    verify_required_field_exists("ColumnMetaData.path_in_schema", &f_3)?;
    verify_required_field_exists("ColumnMetaData.codec", &f_4)?;
    verify_required_field_exists("ColumnMetaData.num_values", &f_5)?;
    verify_required_field_exists("ColumnMetaData.total_uncompressed_size", &f_6)?;
    verify_required_field_exists("ColumnMetaData.total_compressed_size", &f_7)?;
    verify_required_field_exists("ColumnMetaData.data_page_offset", &f_9)?;
    let ret = ColumnMetaData {
      type_: f_1.expect("auto-generated code should have checked for presence of required fields"),
      encodings: f_2.expect("auto-generated code should have checked for presence of required fields"),
      path_in_schema: f_3.expect("auto-generated code should have checked for presence of required fields"),
      codec: f_4.expect("auto-generated code should have checked for presence of required fields"),
      num_values: f_5.expect("auto-generated code should have checked for presence of required fields"),
      total_uncompressed_size: f_6.expect("auto-generated code should have checked for presence of required fields"),
      total_compressed_size: f_7.expect("auto-generated code should have checked for presence of required fields"),
      key_value_metadata: f_8,
      data_page_offset: f_9.expect("auto-generated code should have checked for presence of required fields"),
      index_page_offset: f_10,
      dictionary_page_offset: f_11,
      statistics: f_12,
      encoding_stats: f_13,
      bloom_filter_offset: f_14,
      bloom_filter_length: f_15,
      size_statistics: f_16,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ColumnMetaData");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("type", TType::I32, 1))?;
    self.type_.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encodings", TType::List, 2))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::I32, self.encodings.len() as i32))?;
    for e in &self.encodings {
      e.write_to_out_protocol(o_prot)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("path_in_schema", TType::List, 3))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::String, self.path_in_schema.len() as i32))?;
    for e in &self.path_in_schema {
      o_prot.write_string(e)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("codec", TType::I32, 4))?;
    self.codec.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_values", TType::I64, 5))?;
    o_prot.write_i64(self.num_values)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("total_uncompressed_size", TType::I64, 6))?;
    o_prot.write_i64(self.total_uncompressed_size)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("total_compressed_size", TType::I64, 7))?;
    o_prot.write_i64(self.total_compressed_size)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.key_value_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("key_value_metadata", TType::List, 8))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, fld_var.len() as i32))?;
      for e in fld_var {
        e.write_to_out_protocol(o_prot)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_begin(&TFieldIdentifier::new("data_page_offset", TType::I64, 9))?;
    o_prot.write_i64(self.data_page_offset)?;
    o_prot.write_field_end()?;
    if let Some(fld_var) = self.index_page_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("index_page_offset", TType::I64, 10))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.dictionary_page_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("dictionary_page_offset", TType::I64, 11))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.statistics {
      o_prot.write_field_begin(&TFieldIdentifier::new("statistics", TType::Struct, 12))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.encoding_stats {
      o_prot.write_field_begin(&TFieldIdentifier::new("encoding_stats", TType::List, 13))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, fld_var.len() as i32))?;
      for e in fld_var {
        e.write_to_out_protocol(o_prot)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.bloom_filter_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("bloom_filter_offset", TType::I64, 14))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.bloom_filter_length {
      o_prot.write_field_begin(&TFieldIdentifier::new("bloom_filter_length", TType::I32, 15))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.size_statistics {
      o_prot.write_field_begin(&TFieldIdentifier::new("size_statistics", TType::Struct, 16))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// EncryptionWithFooterKey
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct EncryptionWithFooterKey {
}

impl EncryptionWithFooterKey {
  pub fn new() -> EncryptionWithFooterKey {
    EncryptionWithFooterKey {}
  }
}

impl crate::thrift::TSerializable for EncryptionWithFooterKey {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<EncryptionWithFooterKey> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = EncryptionWithFooterKey {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("EncryptionWithFooterKey");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// EncryptionWithColumnKey
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct EncryptionWithColumnKey {
  /// Column path in schema *
  pub path_in_schema: Vec<String>,
  /// Retrieval metadata of column encryption key *
  pub key_metadata: Option<Vec<u8>>,
}

impl EncryptionWithColumnKey {
  pub fn new<F2>(path_in_schema: Vec<String>, key_metadata: F2) -> EncryptionWithColumnKey where F2: Into<Option<Vec<u8>>> {
    EncryptionWithColumnKey {
      path_in_schema,
      key_metadata: key_metadata.into(),
    }
  }
}

impl crate::thrift::TSerializable for EncryptionWithColumnKey {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<EncryptionWithColumnKey> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<String>> = None;
    let mut f_2: Option<Vec<u8>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<String> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_6 = i_prot.read_string()?;
            val.push(list_elem_6);
          }
          i_prot.read_list_end()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bytes()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("EncryptionWithColumnKey.path_in_schema", &f_1)?;
    let ret = EncryptionWithColumnKey {
      path_in_schema: f_1.expect("auto-generated code should have checked for presence of required fields"),
      key_metadata: f_2,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("EncryptionWithColumnKey");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("path_in_schema", TType::List, 1))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::String, self.path_in_schema.len() as i32))?;
    for e in &self.path_in_schema {
      o_prot.write_string(e)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.key_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("key_metadata", TType::String, 2))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ColumnCryptoMetaData
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum ColumnCryptoMetaData {
  ENCRYPTIONWITHFOOTERKEY(EncryptionWithFooterKey),
  ENCRYPTIONWITHCOLUMNKEY(EncryptionWithColumnKey),
}

impl crate::thrift::TSerializable for ColumnCryptoMetaData {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ColumnCryptoMetaData> {
    let mut ret: Option<ColumnCryptoMetaData> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = EncryptionWithFooterKey::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(ColumnCryptoMetaData::ENCRYPTIONWITHFOOTERKEY(val));
          }
          received_field_count += 1;
        },
        2 => {
          let val = EncryptionWithColumnKey::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(ColumnCryptoMetaData::ENCRYPTIONWITHCOLUMNKEY(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote ColumnCryptoMetaData"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote ColumnCryptoMetaData"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ColumnCryptoMetaData");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      ColumnCryptoMetaData::ENCRYPTIONWITHFOOTERKEY(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("ENCRYPTION_WITH_FOOTER_KEY", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      ColumnCryptoMetaData::ENCRYPTIONWITHCOLUMNKEY(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("ENCRYPTION_WITH_COLUMN_KEY", TType::Struct, 2))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ColumnChunk
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ColumnChunk {
  /// File where column data is stored.  If not set, assumed to be same file as
  /// metadata.  This path is relative to the current file.
  /// 
  pub file_path: Option<String>,
  /// Deprecated: Byte offset in file_path to the ColumnMetaData
  /// 
  /// Past use of this field has been inconsistent, with some implementations
  /// using it to point to the ColumnMetaData and some using it to point to
  /// the first page in the column chunk. In many cases, the ColumnMetaData at this
  /// location is wrong. This field is now deprecated and should not be used.
  /// Writers should set this field to 0 if no ColumnMetaData has been written outside
  /// the footer.
  pub file_offset: i64,
  /// Column metadata for this chunk. Some writers may also replicate this at the
  /// location pointed to by file_path/file_offset.
  /// Note: while marked as optional, this field is in fact required by most major
  /// Parquet implementations. As such, writers MUST populate this field.
  /// 
  pub meta_data: Option<ColumnMetaData>,
  /// File offset of ColumnChunk's OffsetIndex *
  pub offset_index_offset: Option<i64>,
  /// Size of ColumnChunk's OffsetIndex, in bytes *
  pub offset_index_length: Option<i32>,
  /// File offset of ColumnChunk's ColumnIndex *
  pub column_index_offset: Option<i64>,
  /// Size of ColumnChunk's ColumnIndex, in bytes *
  pub column_index_length: Option<i32>,
  /// Crypto metadata of encrypted columns *
  pub crypto_metadata: Option<ColumnCryptoMetaData>,
  /// Encrypted column metadata for this chunk *
  pub encrypted_column_metadata: Option<Vec<u8>>,
}

impl ColumnChunk {
  pub fn new<F1, F3, F4, F5, F6, F7, F8, F9>(file_path: F1, file_offset: i64, meta_data: F3, offset_index_offset: F4, offset_index_length: F5, column_index_offset: F6, column_index_length: F7, crypto_metadata: F8, encrypted_column_metadata: F9) -> ColumnChunk where F1: Into<Option<String>>, F3: Into<Option<ColumnMetaData>>, F4: Into<Option<i64>>, F5: Into<Option<i32>>, F6: Into<Option<i64>>, F7: Into<Option<i32>>, F8: Into<Option<ColumnCryptoMetaData>>, F9: Into<Option<Vec<u8>>> {
    ColumnChunk {
      file_path: file_path.into(),
      file_offset,
      meta_data: meta_data.into(),
      offset_index_offset: offset_index_offset.into(),
      offset_index_length: offset_index_length.into(),
      column_index_offset: column_index_offset.into(),
      column_index_length: column_index_length.into(),
      crypto_metadata: crypto_metadata.into(),
      encrypted_column_metadata: encrypted_column_metadata.into(),
    }
  }
}

impl crate::thrift::TSerializable for ColumnChunk {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ColumnChunk> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<String> = None;
    let mut f_2: Option<i64> = None;
    let mut f_3: Option<ColumnMetaData> = None;
    let mut f_4: Option<i64> = None;
    let mut f_5: Option<i32> = None;
    let mut f_6: Option<i64> = None;
    let mut f_7: Option<i32> = None;
    let mut f_8: Option<ColumnCryptoMetaData> = None;
    let mut f_9: Option<Vec<u8>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_string()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i64()?;
          f_2 = Some(val);
        },
        3 => {
          let val = ColumnMetaData::read_from_in_protocol(i_prot)?;
          f_3 = Some(val);
        },
        4 => {
          let val = i_prot.read_i64()?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_i32()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_i64()?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_i32()?;
          f_7 = Some(val);
        },
        8 => {
          let val = ColumnCryptoMetaData::read_from_in_protocol(i_prot)?;
          f_8 = Some(val);
        },
        9 => {
          let val = i_prot.read_bytes()?;
          f_9 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("ColumnChunk.file_offset", &f_2)?;
    let ret = ColumnChunk {
      file_path: f_1,
      file_offset: f_2.expect("auto-generated code should have checked for presence of required fields"),
      meta_data: f_3,
      offset_index_offset: f_4,
      offset_index_length: f_5,
      column_index_offset: f_6,
      column_index_length: f_7,
      crypto_metadata: f_8,
      encrypted_column_metadata: f_9,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ColumnChunk");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(ref fld_var) = self.file_path {
      o_prot.write_field_begin(&TFieldIdentifier::new("file_path", TType::String, 1))?;
      o_prot.write_string(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_begin(&TFieldIdentifier::new("file_offset", TType::I64, 2))?;
    o_prot.write_i64(self.file_offset)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.meta_data {
      o_prot.write_field_begin(&TFieldIdentifier::new("meta_data", TType::Struct, 3))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.offset_index_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("offset_index_offset", TType::I64, 4))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.offset_index_length {
      o_prot.write_field_begin(&TFieldIdentifier::new("offset_index_length", TType::I32, 5))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.column_index_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("column_index_offset", TType::I64, 6))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.column_index_length {
      o_prot.write_field_begin(&TFieldIdentifier::new("column_index_length", TType::I32, 7))?;
      o_prot.write_i32(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.crypto_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("crypto_metadata", TType::Struct, 8))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.encrypted_column_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("encrypted_column_metadata", TType::String, 9))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// RowGroup
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct RowGroup {
  /// Metadata for each column chunk in this row group.
  /// This list must have the same order as the SchemaElement list in FileMetaData.
  /// 
  pub columns: Vec<ColumnChunk>,
  /// Total byte size of all the uncompressed column data in this row group *
  pub total_byte_size: i64,
  /// Number of rows in this row group *
  pub num_rows: i64,
  /// If set, specifies a sort ordering of the rows in this RowGroup.
  /// The sorting columns can be a subset of all the columns.
  pub sorting_columns: Option<Vec<SortingColumn>>,
  /// Byte offset from beginning of file to first page (data or dictionary)
  /// in this row group *
  pub file_offset: Option<i64>,
  /// Total byte size of all compressed (and potentially encrypted) column data
  /// in this row group *
  pub total_compressed_size: Option<i64>,
  /// Row group ordinal in the file *
  pub ordinal: Option<i16>,
}

impl RowGroup {
  pub fn new<F4, F5, F6, F7>(columns: Vec<ColumnChunk>, total_byte_size: i64, num_rows: i64, sorting_columns: F4, file_offset: F5, total_compressed_size: F6, ordinal: F7) -> RowGroup where F4: Into<Option<Vec<SortingColumn>>>, F5: Into<Option<i64>>, F6: Into<Option<i64>>, F7: Into<Option<i16>> {
    RowGroup {
      columns,
      total_byte_size,
      num_rows,
      sorting_columns: sorting_columns.into(),
      file_offset: file_offset.into(),
      total_compressed_size: total_compressed_size.into(),
      ordinal: ordinal.into(),
    }
  }
}

impl crate::thrift::TSerializable for RowGroup {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<RowGroup> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<ColumnChunk>> = None;
    let mut f_2: Option<i64> = None;
    let mut f_3: Option<i64> = None;
    let mut f_4: Option<Vec<SortingColumn>> = None;
    let mut f_5: Option<i64> = None;
    let mut f_6: Option<i64> = None;
    let mut f_7: Option<i16> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<ColumnChunk> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_7 = ColumnChunk::read_from_in_protocol(i_prot)?;
            val.push(list_elem_7);
          }
          i_prot.read_list_end()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i64()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i64()?;
          f_3 = Some(val);
        },
        4 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<SortingColumn> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_8 = SortingColumn::read_from_in_protocol(i_prot)?;
            val.push(list_elem_8);
          }
          i_prot.read_list_end()?;
          f_4 = Some(val);
        },
        5 => {
          let val = i_prot.read_i64()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_i64()?;
          f_6 = Some(val);
        },
        7 => {
          let val = i_prot.read_i16()?;
          f_7 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("RowGroup.columns", &f_1)?;
    verify_required_field_exists("RowGroup.total_byte_size", &f_2)?;
    verify_required_field_exists("RowGroup.num_rows", &f_3)?;
    let ret = RowGroup {
      columns: f_1.expect("auto-generated code should have checked for presence of required fields"),
      total_byte_size: f_2.expect("auto-generated code should have checked for presence of required fields"),
      num_rows: f_3.expect("auto-generated code should have checked for presence of required fields"),
      sorting_columns: f_4,
      file_offset: f_5,
      total_compressed_size: f_6,
      ordinal: f_7,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("RowGroup");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("columns", TType::List, 1))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, self.columns.len() as i32))?;
    for e in &self.columns {
      e.write_to_out_protocol(o_prot)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("total_byte_size", TType::I64, 2))?;
    o_prot.write_i64(self.total_byte_size)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_rows", TType::I64, 3))?;
    o_prot.write_i64(self.num_rows)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.sorting_columns {
      o_prot.write_field_begin(&TFieldIdentifier::new("sorting_columns", TType::List, 4))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, fld_var.len() as i32))?;
      for e in fld_var {
        e.write_to_out_protocol(o_prot)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.file_offset {
      o_prot.write_field_begin(&TFieldIdentifier::new("file_offset", TType::I64, 5))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.total_compressed_size {
      o_prot.write_field_begin(&TFieldIdentifier::new("total_compressed_size", TType::I64, 6))?;
      o_prot.write_i64(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.ordinal {
      o_prot.write_field_begin(&TFieldIdentifier::new("ordinal", TType::I16, 7))?;
      o_prot.write_i16(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// TypeDefinedOrder
//

/// Empty struct to signal the order defined by the physical or logical type
#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct TypeDefinedOrder {
}

impl TypeDefinedOrder {
  pub fn new() -> TypeDefinedOrder {
    TypeDefinedOrder {}
  }
}

impl crate::thrift::TSerializable for TypeDefinedOrder {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<TypeDefinedOrder> {
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      i_prot.skip(field_ident.field_type)?;
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = TypeDefinedOrder {};
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("TypeDefinedOrder");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ColumnOrder
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum ColumnOrder {
  TYPEORDER(TypeDefinedOrder),
}

impl crate::thrift::TSerializable for ColumnOrder {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ColumnOrder> {
    let mut ret: Option<ColumnOrder> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = TypeDefinedOrder::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(ColumnOrder::TYPEORDER(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote ColumnOrder"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote ColumnOrder"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ColumnOrder");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      ColumnOrder::TYPEORDER(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("TYPE_ORDER", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// PageLocation
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct PageLocation {
  /// Offset of the page in the file *
  pub offset: i64,
  /// Size of the page, including header. Sum of compressed_page_size and header
  /// length
  pub compressed_page_size: i32,
  /// Index within the RowGroup of the first row of the page. When an
  /// OffsetIndex is present, pages must begin on row boundaries
  /// (repetition_level = 0).
  pub first_row_index: i64,
}

impl PageLocation {
  pub fn new(offset: i64, compressed_page_size: i32, first_row_index: i64) -> PageLocation {
    PageLocation {
      offset,
      compressed_page_size,
      first_row_index,
    }
  }
}

impl crate::thrift::TSerializable for PageLocation {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<PageLocation> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i64> = None;
    let mut f_2: Option<i32> = None;
    let mut f_3: Option<i64> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i64()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_i32()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i64()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("PageLocation.offset", &f_1)?;
    verify_required_field_exists("PageLocation.compressed_page_size", &f_2)?;
    verify_required_field_exists("PageLocation.first_row_index", &f_3)?;
    let ret = PageLocation {
      offset: f_1.expect("auto-generated code should have checked for presence of required fields"),
      compressed_page_size: f_2.expect("auto-generated code should have checked for presence of required fields"),
      first_row_index: f_3.expect("auto-generated code should have checked for presence of required fields"),
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("PageLocation");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("offset", TType::I64, 1))?;
    o_prot.write_i64(self.offset)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("compressed_page_size", TType::I32, 2))?;
    o_prot.write_i32(self.compressed_page_size)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("first_row_index", TType::I64, 3))?;
    o_prot.write_i64(self.first_row_index)?;
    o_prot.write_field_end()?;
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// OffsetIndex
//

/// Optional offsets for each data page in a ColumnChunk.
/// 
/// Forms part of the page index, along with ColumnIndex.
/// 
/// OffsetIndex may be present even if ColumnIndex is not.
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct OffsetIndex {
  /// PageLocations, ordered by increasing PageLocation.offset. It is required
  /// that page_locations\[i\].first_row_index < page_locations\[i+1\].first_row_index.
  pub page_locations: Vec<PageLocation>,
  /// Unencoded/uncompressed size for BYTE_ARRAY types.
  /// 
  /// See documention for unencoded_byte_array_data_bytes in SizeStatistics for
  /// more details on this field.
  pub unencoded_byte_array_data_bytes: Option<Vec<i64>>,
}

impl OffsetIndex {
  pub fn new<F2>(page_locations: Vec<PageLocation>, unencoded_byte_array_data_bytes: F2) -> OffsetIndex where F2: Into<Option<Vec<i64>>> {
    OffsetIndex {
      page_locations,
      unencoded_byte_array_data_bytes: unencoded_byte_array_data_bytes.into(),
    }
  }
}

impl crate::thrift::TSerializable for OffsetIndex {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<OffsetIndex> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<PageLocation>> = None;
    let mut f_2: Option<Vec<i64>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<PageLocation> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_9 = PageLocation::read_from_in_protocol(i_prot)?;
            val.push(list_elem_9);
          }
          i_prot.read_list_end()?;
          f_1 = Some(val);
        },
        2 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_10 = i_prot.read_i64()?;
            val.push(list_elem_10);
          }
          i_prot.read_list_end()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("OffsetIndex.page_locations", &f_1)?;
    let ret = OffsetIndex {
      page_locations: f_1.expect("auto-generated code should have checked for presence of required fields"),
      unencoded_byte_array_data_bytes: f_2,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("OffsetIndex");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("page_locations", TType::List, 1))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, self.page_locations.len() as i32))?;
    for e in &self.page_locations {
      e.write_to_out_protocol(o_prot)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.unencoded_byte_array_data_bytes {
      o_prot.write_field_begin(&TFieldIdentifier::new("unencoded_byte_array_data_bytes", TType::List, 2))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// ColumnIndex
//

/// Optional statistics for each data page in a ColumnChunk.
/// 
/// Forms part the page index, along with OffsetIndex.
/// 
/// If this structure is present, OffsetIndex must also be present.
/// 
/// For each field in this structure, `<field>`\[i\] refers to the page at
/// OffsetIndex.page_locations\[i\]
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ColumnIndex {
  /// A list of Boolean values to determine the validity of the corresponding
  /// min and max values. If true, a page contains only null values, and writers
  /// have to set the corresponding entries in min_values and max_values to
  /// byte\[0\], so that all lists have the same length. If false, the
  /// corresponding entries in min_values and max_values must be valid.
  pub null_pages: Vec<bool>,
  /// Two lists containing lower and upper bounds for the values of each page
  /// determined by the ColumnOrder of the column. These may be the actual
  /// minimum and maximum values found on a page, but can also be (more compact)
  /// values that do not exist on a page. For example, instead of storing ""Blart
  /// Versenwald III", a writer may set min_values\[i\]="B", max_values\[i\]="C".
  /// Such more compact values must still be valid values within the column's
  /// logical type. Readers must make sure that list entries are populated before
  /// using them by inspecting null_pages.
  pub min_values: Vec<Vec<u8>>,
  pub max_values: Vec<Vec<u8>>,
  /// Stores whether both min_values and max_values are ordered and if so, in
  /// which direction. This allows readers to perform binary searches in both
  /// lists. Readers cannot assume that max_values\[i\] <= min_values\[i+1\], even
  /// if the lists are ordered.
  pub boundary_order: BoundaryOrder,
  /// A list containing the number of null values for each page *
  pub null_counts: Option<Vec<i64>>,
  /// Contains repetition level histograms for each page
  /// concatenated together.  The repetition_level_histogram field on
  /// SizeStatistics contains more details.
  /// 
  /// When present the length should always be (number of pages *
  /// (max_repetition_level + 1)) elements.
  /// 
  /// Element 0 is the first element of the histogram for the first page.
  /// Element (max_repetition_level + 1) is the first element of the histogram
  /// for the second page.
  /// 
  pub repetition_level_histograms: Option<Vec<i64>>,
  /// Same as repetition_level_histograms except for definitions levels.
  /// 
  pub definition_level_histograms: Option<Vec<i64>>,
}

impl ColumnIndex {
  pub fn new<F5, F6, F7>(null_pages: Vec<bool>, min_values: Vec<Vec<u8>>, max_values: Vec<Vec<u8>>, boundary_order: BoundaryOrder, null_counts: F5, repetition_level_histograms: F6, definition_level_histograms: F7) -> ColumnIndex where F5: Into<Option<Vec<i64>>>, F6: Into<Option<Vec<i64>>>, F7: Into<Option<Vec<i64>>> {
    ColumnIndex {
      null_pages,
      min_values,
      max_values,
      boundary_order,
      null_counts: null_counts.into(),
      repetition_level_histograms: repetition_level_histograms.into(),
      definition_level_histograms: definition_level_histograms.into(),
    }
  }
}

impl crate::thrift::TSerializable for ColumnIndex {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<ColumnIndex> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<bool>> = None;
    let mut f_2: Option<Vec<Vec<u8>>> = None;
    let mut f_3: Option<Vec<Vec<u8>>> = None;
    let mut f_4: Option<BoundaryOrder> = None;
    let mut f_5: Option<Vec<i64>> = None;
    let mut f_6: Option<Vec<i64>> = None;
    let mut f_7: Option<Vec<i64>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<bool> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_11 = i_prot.read_bool()?;
            val.push(list_elem_11);
          }
          i_prot.read_list_end()?;
          f_1 = Some(val);
        },
        2 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<Vec<u8>> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_12 = i_prot.read_bytes()?;
            val.push(list_elem_12);
          }
          i_prot.read_list_end()?;
          f_2 = Some(val);
        },
        3 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<Vec<u8>> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_13 = i_prot.read_bytes()?;
            val.push(list_elem_13);
          }
          i_prot.read_list_end()?;
          f_3 = Some(val);
        },
        4 => {
          let val = BoundaryOrder::read_from_in_protocol(i_prot)?;
          f_4 = Some(val);
        },
        5 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_14 = i_prot.read_i64()?;
            val.push(list_elem_14);
          }
          i_prot.read_list_end()?;
          f_5 = Some(val);
        },
        6 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_15 = i_prot.read_i64()?;
            val.push(list_elem_15);
          }
          i_prot.read_list_end()?;
          f_6 = Some(val);
        },
        7 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<i64> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_16 = i_prot.read_i64()?;
            val.push(list_elem_16);
          }
          i_prot.read_list_end()?;
          f_7 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("ColumnIndex.null_pages", &f_1)?;
    verify_required_field_exists("ColumnIndex.min_values", &f_2)?;
    verify_required_field_exists("ColumnIndex.max_values", &f_3)?;
    verify_required_field_exists("ColumnIndex.boundary_order", &f_4)?;
    let ret = ColumnIndex {
      null_pages: f_1.expect("auto-generated code should have checked for presence of required fields"),
      min_values: f_2.expect("auto-generated code should have checked for presence of required fields"),
      max_values: f_3.expect("auto-generated code should have checked for presence of required fields"),
      boundary_order: f_4.expect("auto-generated code should have checked for presence of required fields"),
      null_counts: f_5,
      repetition_level_histograms: f_6,
      definition_level_histograms: f_7,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("ColumnIndex");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("null_pages", TType::List, 1))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::Bool, self.null_pages.len() as i32))?;
    for e in &self.null_pages {
      o_prot.write_bool(*e)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("min_values", TType::List, 2))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::String, self.min_values.len() as i32))?;
    for e in &self.min_values {
      o_prot.write_bytes(e)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("max_values", TType::List, 3))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::String, self.max_values.len() as i32))?;
    for e in &self.max_values {
      o_prot.write_bytes(e)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("boundary_order", TType::I32, 4))?;
    self.boundary_order.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.null_counts {
      o_prot.write_field_begin(&TFieldIdentifier::new("null_counts", TType::List, 5))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.repetition_level_histograms {
      o_prot.write_field_begin(&TFieldIdentifier::new("repetition_level_histograms", TType::List, 6))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.definition_level_histograms {
      o_prot.write_field_begin(&TFieldIdentifier::new("definition_level_histograms", TType::List, 7))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::I64, fld_var.len() as i32))?;
      for e in fld_var {
        o_prot.write_i64(*e)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// AesGcmV1
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct AesGcmV1 {
  /// AAD prefix *
  pub aad_prefix: Option<Vec<u8>>,
  /// Unique file identifier part of AAD suffix *
  pub aad_file_unique: Option<Vec<u8>>,
  /// In files encrypted with AAD prefix without storing it,
  /// readers must supply the prefix *
  pub supply_aad_prefix: Option<bool>,
}

impl AesGcmV1 {
  pub fn new<F1, F2, F3>(aad_prefix: F1, aad_file_unique: F2, supply_aad_prefix: F3) -> AesGcmV1 where F1: Into<Option<Vec<u8>>>, F2: Into<Option<Vec<u8>>>, F3: Into<Option<bool>> {
    AesGcmV1 {
      aad_prefix: aad_prefix.into(),
      aad_file_unique: aad_file_unique.into(),
      supply_aad_prefix: supply_aad_prefix.into(),
    }
  }
}

impl crate::thrift::TSerializable for AesGcmV1 {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<AesGcmV1> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<u8>> = None;
    let mut f_2: Option<Vec<u8>> = None;
    let mut f_3: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_bytes()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bytes()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_bool()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = AesGcmV1 {
      aad_prefix: f_1,
      aad_file_unique: f_2,
      supply_aad_prefix: f_3,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("AesGcmV1");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(ref fld_var) = self.aad_prefix {
      o_prot.write_field_begin(&TFieldIdentifier::new("aad_prefix", TType::String, 1))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.aad_file_unique {
      o_prot.write_field_begin(&TFieldIdentifier::new("aad_file_unique", TType::String, 2))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.supply_aad_prefix {
      o_prot.write_field_begin(&TFieldIdentifier::new("supply_aad_prefix", TType::Bool, 3))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// AesGcmCtrV1
//

#[derive(Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct AesGcmCtrV1 {
  /// AAD prefix *
  pub aad_prefix: Option<Vec<u8>>,
  /// Unique file identifier part of AAD suffix *
  pub aad_file_unique: Option<Vec<u8>>,
  /// In files encrypted with AAD prefix without storing it,
  /// readers must supply the prefix *
  pub supply_aad_prefix: Option<bool>,
}

impl AesGcmCtrV1 {
  pub fn new<F1, F2, F3>(aad_prefix: F1, aad_file_unique: F2, supply_aad_prefix: F3) -> AesGcmCtrV1 where F1: Into<Option<Vec<u8>>>, F2: Into<Option<Vec<u8>>>, F3: Into<Option<bool>> {
    AesGcmCtrV1 {
      aad_prefix: aad_prefix.into(),
      aad_file_unique: aad_file_unique.into(),
      supply_aad_prefix: supply_aad_prefix.into(),
    }
  }
}

impl crate::thrift::TSerializable for AesGcmCtrV1 {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<AesGcmCtrV1> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<Vec<u8>> = None;
    let mut f_2: Option<Vec<u8>> = None;
    let mut f_3: Option<bool> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_bytes()?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bytes()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_bool()?;
          f_3 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    let ret = AesGcmCtrV1 {
      aad_prefix: f_1,
      aad_file_unique: f_2,
      supply_aad_prefix: f_3,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("AesGcmCtrV1");
    o_prot.write_struct_begin(&struct_ident)?;
    if let Some(ref fld_var) = self.aad_prefix {
      o_prot.write_field_begin(&TFieldIdentifier::new("aad_prefix", TType::String, 1))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.aad_file_unique {
      o_prot.write_field_begin(&TFieldIdentifier::new("aad_file_unique", TType::String, 2))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(fld_var) = self.supply_aad_prefix {
      o_prot.write_field_begin(&TFieldIdentifier::new("supply_aad_prefix", TType::Bool, 3))?;
      o_prot.write_bool(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// EncryptionAlgorithm
//

#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum EncryptionAlgorithm {
  AESGCMV1(AesGcmV1),
  AESGCMCTRV1(AesGcmCtrV1),
}

impl crate::thrift::TSerializable for EncryptionAlgorithm {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<EncryptionAlgorithm> {
    let mut ret: Option<EncryptionAlgorithm> = None;
    let mut received_field_count = 0;
    i_prot.read_struct_begin()?;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = AesGcmV1::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(EncryptionAlgorithm::AESGCMV1(val));
          }
          received_field_count += 1;
        },
        2 => {
          let val = AesGcmCtrV1::read_from_in_protocol(i_prot)?;
          if ret.is_none() {
            ret = Some(EncryptionAlgorithm::AESGCMCTRV1(val));
          }
          received_field_count += 1;
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
          received_field_count += 1;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    if received_field_count == 0 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received empty union from remote EncryptionAlgorithm"
          )
        )
      )
    } else if received_field_count > 1 {
      Err(
        thrift::Error::Protocol(
          ProtocolError::new(
            ProtocolErrorKind::InvalidData,
            "received multiple fields for union from remote EncryptionAlgorithm"
          )
        )
      )
    } else {
      ret.ok_or_else(|| thrift::Error::Protocol(ProtocolError::new(ProtocolErrorKind::InvalidData, "return value should have been constructed")))
    }
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("EncryptionAlgorithm");
    o_prot.write_struct_begin(&struct_ident)?;
    match *self {
      EncryptionAlgorithm::AESGCMV1(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("AES_GCM_V1", TType::Struct, 1))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
      EncryptionAlgorithm::AESGCMCTRV1(ref f) => {
        o_prot.write_field_begin(&TFieldIdentifier::new("AES_GCM_CTR_V1", TType::Struct, 2))?;
        f.write_to_out_protocol(o_prot)?;
        o_prot.write_field_end()?;
      },
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// FileMetaData
//

/// Description for file metadata
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct FileMetaData {
  /// Version of this file *
  pub version: i32,
  /// Parquet schema for this file.  This schema contains metadata for all the columns.
  /// The schema is represented as a tree with a single root.  The nodes of the tree
  /// are flattened to a list by doing a depth-first traversal.
  /// The column metadata contains the path in the schema for that column which can be
  /// used to map columns to nodes in the schema.
  /// The first element is the root *
  pub schema: Vec<SchemaElement>,
  /// Number of rows in this file *
  pub num_rows: i64,
  /// Row groups in this file *
  pub row_groups: Vec<RowGroup>,
  /// Optional key/value metadata *
  pub key_value_metadata: Option<Vec<KeyValue>>,
  /// String for application that wrote this file.  This should be in the format
  /// `<Application>` version `<App Version>` (build `<App Build Hash>`).
  /// e.g. impala version 1.0 (build 6cf94d29b2b7115df4de2c06e2ab4326d721eb55)
  /// 
  pub created_by: Option<String>,
  /// Sort order used for the min_value and max_value fields in the Statistics
  /// objects and the min_values and max_values fields in the ColumnIndex
  /// objects of each column in this file. Sort orders are listed in the order
  /// matching the columns in the schema. The indexes are not necessary the same
  /// though, because only leaf nodes of the schema are represented in the list
  /// of sort orders.
  /// 
  /// Without column_orders, the meaning of the min_value and max_value fields
  /// in the Statistics object and the ColumnIndex object is undefined. To ensure
  /// well-defined behaviour, if these fields are written to a Parquet file,
  /// column_orders must be written as well.
  /// 
  /// The obsolete min and max fields in the Statistics object are always sorted
  /// by signed comparison regardless of column_orders.
  pub column_orders: Option<Vec<ColumnOrder>>,
  /// Encryption algorithm. This field is set only in encrypted files
  /// with plaintext footer. Files with encrypted footer store algorithm id
  /// in FileCryptoMetaData structure.
  pub encryption_algorithm: Option<EncryptionAlgorithm>,
  /// Retrieval metadata of key used for signing the footer.
  /// Used only in encrypted files with plaintext footer.
  pub footer_signing_key_metadata: Option<Vec<u8>>,
}

impl FileMetaData {
  pub fn new<F5, F6, F7, F8, F9>(version: i32, schema: Vec<SchemaElement>, num_rows: i64, row_groups: Vec<RowGroup>, key_value_metadata: F5, created_by: F6, column_orders: F7, encryption_algorithm: F8, footer_signing_key_metadata: F9) -> FileMetaData where F5: Into<Option<Vec<KeyValue>>>, F6: Into<Option<String>>, F7: Into<Option<Vec<ColumnOrder>>>, F8: Into<Option<EncryptionAlgorithm>>, F9: Into<Option<Vec<u8>>> {
    FileMetaData {
      version,
      schema,
      num_rows,
      row_groups,
      key_value_metadata: key_value_metadata.into(),
      created_by: created_by.into(),
      column_orders: column_orders.into(),
      encryption_algorithm: encryption_algorithm.into(),
      footer_signing_key_metadata: footer_signing_key_metadata.into(),
    }
  }
}

impl crate::thrift::TSerializable for FileMetaData {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<FileMetaData> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<i32> = None;
    let mut f_2: Option<Vec<SchemaElement>> = None;
    let mut f_3: Option<i64> = None;
    let mut f_4: Option<Vec<RowGroup>> = None;
    let mut f_5: Option<Vec<KeyValue>> = None;
    let mut f_6: Option<String> = None;
    let mut f_7: Option<Vec<ColumnOrder>> = None;
    let mut f_8: Option<EncryptionAlgorithm> = None;
    let mut f_9: Option<Vec<u8>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = i_prot.read_i32()?;
          f_1 = Some(val);
        },
        2 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<SchemaElement> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_17 = SchemaElement::read_from_in_protocol(i_prot)?;
            val.push(list_elem_17);
          }
          i_prot.read_list_end()?;
          f_2 = Some(val);
        },
        3 => {
          let val = i_prot.read_i64()?;
          f_3 = Some(val);
        },
        4 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<RowGroup> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_18 = RowGroup::read_from_in_protocol(i_prot)?;
            val.push(list_elem_18);
          }
          i_prot.read_list_end()?;
          f_4 = Some(val);
        },
        5 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<KeyValue> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_19 = KeyValue::read_from_in_protocol(i_prot)?;
            val.push(list_elem_19);
          }
          i_prot.read_list_end()?;
          f_5 = Some(val);
        },
        6 => {
          let val = i_prot.read_string()?;
          f_6 = Some(val);
        },
        7 => {
          let list_ident = i_prot.read_list_begin()?;
          let mut val: Vec<ColumnOrder> = Vec::with_capacity(list_ident.size as usize);
          for _ in 0..list_ident.size {
            let list_elem_20 = ColumnOrder::read_from_in_protocol(i_prot)?;
            val.push(list_elem_20);
          }
          i_prot.read_list_end()?;
          f_7 = Some(val);
        },
        8 => {
          let val = EncryptionAlgorithm::read_from_in_protocol(i_prot)?;
          f_8 = Some(val);
        },
        9 => {
          let val = i_prot.read_bytes()?;
          f_9 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("FileMetaData.version", &f_1)?;
    verify_required_field_exists("FileMetaData.schema", &f_2)?;
    verify_required_field_exists("FileMetaData.num_rows", &f_3)?;
    verify_required_field_exists("FileMetaData.row_groups", &f_4)?;
    let ret = FileMetaData {
      version: f_1.expect("auto-generated code should have checked for presence of required fields"),
      schema: f_2.expect("auto-generated code should have checked for presence of required fields"),
      num_rows: f_3.expect("auto-generated code should have checked for presence of required fields"),
      row_groups: f_4.expect("auto-generated code should have checked for presence of required fields"),
      key_value_metadata: f_5,
      created_by: f_6,
      column_orders: f_7,
      encryption_algorithm: f_8,
      footer_signing_key_metadata: f_9,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("FileMetaData");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("version", TType::I32, 1))?;
    o_prot.write_i32(self.version)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("schema", TType::List, 2))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, self.schema.len() as i32))?;
    for e in &self.schema {
      e.write_to_out_protocol(o_prot)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("num_rows", TType::I64, 3))?;
    o_prot.write_i64(self.num_rows)?;
    o_prot.write_field_end()?;
    o_prot.write_field_begin(&TFieldIdentifier::new("row_groups", TType::List, 4))?;
    o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, self.row_groups.len() as i32))?;
    for e in &self.row_groups {
      e.write_to_out_protocol(o_prot)?;
    }
    o_prot.write_list_end()?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.key_value_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("key_value_metadata", TType::List, 5))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, fld_var.len() as i32))?;
      for e in fld_var {
        e.write_to_out_protocol(o_prot)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.created_by {
      o_prot.write_field_begin(&TFieldIdentifier::new("created_by", TType::String, 6))?;
      o_prot.write_string(fld_var)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.column_orders {
      o_prot.write_field_begin(&TFieldIdentifier::new("column_orders", TType::List, 7))?;
      o_prot.write_list_begin(&TListIdentifier::new(TType::Struct, fld_var.len() as i32))?;
      for e in fld_var {
        e.write_to_out_protocol(o_prot)?;
      }
      o_prot.write_list_end()?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.encryption_algorithm {
      o_prot.write_field_begin(&TFieldIdentifier::new("encryption_algorithm", TType::Struct, 8))?;
      fld_var.write_to_out_protocol(o_prot)?;
      o_prot.write_field_end()?
    }
    if let Some(ref fld_var) = self.footer_signing_key_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("footer_signing_key_metadata", TType::String, 9))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}

//
// FileCryptoMetaData
//

/// Crypto metadata for files with encrypted footer *
#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct FileCryptoMetaData {
  /// Encryption algorithm. This field is only used for files
  /// with encrypted footer. Files with plaintext footer store algorithm id
  /// inside footer (FileMetaData structure).
  pub encryption_algorithm: EncryptionAlgorithm,
  /// Retrieval metadata of key used for encryption of footer,
  /// and (possibly) columns *
  pub key_metadata: Option<Vec<u8>>,
}

impl FileCryptoMetaData {
  pub fn new<F2>(encryption_algorithm: EncryptionAlgorithm, key_metadata: F2) -> FileCryptoMetaData where F2: Into<Option<Vec<u8>>> {
    FileCryptoMetaData {
      encryption_algorithm,
      key_metadata: key_metadata.into(),
    }
  }
}

impl crate::thrift::TSerializable for FileCryptoMetaData {
  fn read_from_in_protocol<T: TInputProtocol>(i_prot: &mut T) -> thrift::Result<FileCryptoMetaData> {
    i_prot.read_struct_begin()?;
    let mut f_1: Option<EncryptionAlgorithm> = None;
    let mut f_2: Option<Vec<u8>> = None;
    loop {
      let field_ident = i_prot.read_field_begin()?;
      if field_ident.field_type == TType::Stop {
        break;
      }
      let field_id = field_id(&field_ident)?;
      match field_id {
        1 => {
          let val = EncryptionAlgorithm::read_from_in_protocol(i_prot)?;
          f_1 = Some(val);
        },
        2 => {
          let val = i_prot.read_bytes()?;
          f_2 = Some(val);
        },
        _ => {
          i_prot.skip(field_ident.field_type)?;
        },
      };
      i_prot.read_field_end()?;
    }
    i_prot.read_struct_end()?;
    verify_required_field_exists("FileCryptoMetaData.encryption_algorithm", &f_1)?;
    let ret = FileCryptoMetaData {
      encryption_algorithm: f_1.expect("auto-generated code should have checked for presence of required fields"),
      key_metadata: f_2,
    };
    Ok(ret)
  }
  fn write_to_out_protocol<T: TOutputProtocol>(&self, o_prot: &mut T) -> thrift::Result<()> {
    let struct_ident = TStructIdentifier::new("FileCryptoMetaData");
    o_prot.write_struct_begin(&struct_ident)?;
    o_prot.write_field_begin(&TFieldIdentifier::new("encryption_algorithm", TType::Struct, 1))?;
    self.encryption_algorithm.write_to_out_protocol(o_prot)?;
    o_prot.write_field_end()?;
    if let Some(ref fld_var) = self.key_metadata {
      o_prot.write_field_begin(&TFieldIdentifier::new("key_metadata", TType::String, 2))?;
      o_prot.write_bytes(fld_var)?;
      o_prot.write_field_end()?
    }
    o_prot.write_field_stop()?;
    o_prot.write_struct_end()
  }
}