Module org.apache.arrow.format
Package org.apache.arrow.flatbuf

Class FieldNode

java.lang.Object
com.google.flatbuffers.Struct
org.apache.arrow.flatbuf.FieldNode
public final class FieldNode extends com.google.flatbuffers.Struct
---------------------------------------------------------------------- Data structures for describing a table row batch (a collection of equal-length Arrow arrays) Metadata about a field at some level of a nested type tree (but not its children). For example, a List with values `[[1, 2, 3], null, [4], [5, 6], null]` would have {length: 5, null_count: 2} for its List node, and {length: 6, null_count: 0} for its Int16 node, as separate FieldNode structs

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static final class 
    FieldNode.Vector
     

  • Field Summary

    Fields inherited from class com.google.flatbuffers.Struct

    bb, bb_pos

  • Constructor Summary

    Constructors
    Constructor
    Description
    FieldNode()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    FieldNode
    __assign(int _i, ByteBuffer _bb)
     
    void
    __init(int _i, ByteBuffer _bb)
     
    static int
    createFieldNode(com.google.flatbuffers.FlatBufferBuilder builder, long length, long nullCount)
     
    long
    length()
    The number of value slots in the Arrow array at this level of a nested tree
    long
    nullCount()
    The number of observed nulls.

    Methods inherited from class com.google.flatbuffers.Struct

    __reset, __reset

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • FieldNode

      public FieldNode()

  • Method Details

    • __init

      public void __init(int _i, ByteBuffer _bb)

    • __assign

      public FieldNode __assign(int _i, ByteBuffer _bb)

    • length

      public long length()
      The number of value slots in the Arrow array at this level of a nested tree

    • nullCount

      public long nullCount()
      The number of observed nulls. Fields with null_count == 0 may choose not to write their physical validity bitmap out as a materialized buffer, instead setting the length of the bitmap buffer to 0.

    • createFieldNode

      public static int createFieldNode(com.google.flatbuffers.FlatBufferBuilder builder, long length, long nullCount)