Struct Json

pub struct Json(JsonMetadata);

The extension type for JSON.

Extension name: arrow.json.

The storage type of this extension is String or LargeString or StringView. Only UTF-8 encoded JSON as specified in rfc8259 is supported.

This type does not have any parameters.

Metadata is either an empty string or a JSON string with an empty object. In the future, additional fields may be added, but they are not required to interpret the array.

https://arrow.apache.org/docs/format/CanonicalExtensions.html#json

Tuple Fields

0: JsonMetadata

Trait Implementations

impl Clone for Json

fn clone(&self) -> Json

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Json

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Json

fn default() -> Json

Returns the “default value” for a type.

impl ExtensionType for Json

const NAME: &'static str = "arrow.json"

The name identifying this extension type.

type Metadata = JsonMetadata

The metadata type of this extension type.

fn metadata(&self) -> &Self::Metadata

Returns a reference to the metadata of this extension type, or &() if if this extension type defines no metadata (Self::Metadata=()).

fn serialize_metadata(&self) -> Option<String>

Returns the serialized representation of the metadata of this extension type, or None if this extension type defines no metadata (Self::Metadata=()).

fn deserialize_metadata( metadata: Option<&str>, ) -> Result<Self::Metadata, ArrowError>

Deserialize the metadata of this extension type from the serialized representation of the metadata. An extension type that defines no metadata should expect None for the serialized metadata and return Ok(()).

fn supports_data_type(&self, data_type: &DataType) -> Result<(), ArrowError>

Returns OK()) iff the given data type is supported by this extension type.

fn try_new( data_type: &DataType, metadata: Self::Metadata, ) -> Result<Self, ArrowError>

Construct this extension type for a field with the given data type and metadata.

impl From<Json> for CanonicalExtensionType

fn from(value: Json) -> Self

Converts to this type from the input type.

impl PartialEq for Json

fn eq(&self, other: &Json) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Json