org.apache.arrow.vector

Interface FieldVector

All Superinterfaces:

AutoCloseable, Closeable, Iterable<ValueVector>, ValueVector

All Known Implementing Classes:

FixedSizeListVector, ListVector, NullableBigIntVector, NullableBitVector, NullableDateDayVector, NullableDateMilliVector, NullableDecimalVector, NullableFloat4Vector, NullableFloat8Vector, NullableIntervalDayVector, NullableIntervalYearVector, NullableIntVector, NullableMapVector, NullableSmallIntVector, NullableTimeMicroVector, NullableTimeMilliVector, NullableTimeNanoVector, NullableTimeSecVector, NullableTimeStampMicroVector, NullableTimeStampMilliVector, NullableTimeStampNanoVector, NullableTimeStampSecVector, NullableTinyIntVector, NullableUInt1Vector, NullableUInt2Vector, NullableUInt4Vector, NullableUInt8Vector, NullableVarBinaryVector, NullableVarCharVector, UnionVector, ZeroVector

public interface FieldVector
extends ValueVector

A vector corresponding to a Field in the schema It has inner vectors backed by buffers (validity, offsets, data, ...)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.arrow.vector.ValueVector

ValueVector.Accessor, ValueVector.Mutator

Method Summary

Methods

Modifier and Type	Method and Description
List<FieldVector>	getChildrenFromFields() the returned list is the same size as the list passed to initializeChildrenFromFields
List<ArrowBuf>	getFieldBuffers() (same size as getFieldVectors() since it is their content)
List<BufferBacked>	getFieldInnerVectors()
void	initializeChildrenFromFields(List<Field> children) Initializes the child vectors to be later loaded with loadBuffers
void	loadFieldBuffers(ArrowFieldNode fieldNode, List<ArrowBuf> ownBuffers) loads data in the vectors (ownBuffers must be the same size as getFieldVectors())

Methods inherited from interface org.apache.arrow.vector.ValueVector

allocateNew, allocateNewSafe, clear, close, getAccessor, getAllocator, getBuffers, getBufferSize, getBufferSizeFor, getField, getMinorType, getMutator, getReader, getTransferPair, getTransferPair, getTransferPair, getValueCapacity, makeTransferPair, reAlloc, setInitialCapacity

Methods inherited from interface java.lang.Iterable

iterator

Method Detail

initializeChildrenFromFields

void initializeChildrenFromFields(List<Field> children)

Initializes the child vectors to be later loaded with loadBuffers

Parameters:

children - the schema

getChildrenFromFields

List<FieldVector> getChildrenFromFields()

the returned list is the same size as the list passed to initializeChildrenFromFields

Returns:

the children according to schema (empty for primitive types)

loadFieldBuffers

void loadFieldBuffers(ArrowFieldNode fieldNode,
                    List<ArrowBuf> ownBuffers)

loads data in the vectors (ownBuffers must be the same size as getFieldVectors())

Parameters:

fieldNode - the fieldNode

ownBuffers - the buffers for this Field (own buffers only, children not included)

getFieldBuffers

List<ArrowBuf> getFieldBuffers()

(same size as getFieldVectors() since it is their content)

Returns:

the buffers containing the data for this vector (ready for reading)

getFieldInnerVectors

List<BufferBacked> getFieldInnerVectors()

Returns:

the inner vectors for this field as defined by the TypeLayout