org.apache.arrow.vector

インタフェース FieldVector

すべてのスーパーインタフェース:

AutoCloseable, Closeable, Iterable<ValueVector>, ValueVector

既知の実装クラスのリスト:

BaseFixedWidthVector, BaseVariableWidthVector, BigIntVector, BitVector, DateDayVector, DateMilliVector, DecimalVector, FixedSizeBinaryVector, FixedSizeListVector, Float4Vector, Float8Vector, IntervalDayVector, IntervalYearVector, IntVector, ListVector, SmallIntVector, StructVector, TimeMicroVector, TimeMilliVector, TimeNanoVector, TimeSecVector, TimeStampMicroTZVector, TimeStampMicroVector, TimeStampMilliTZVector, TimeStampMilliVector, TimeStampNanoTZVector, TimeStampNanoVector, TimeStampSecTZVector, TimeStampSecVector, TimeStampVector, TinyIntVector, UInt1Vector, UInt2Vector, UInt4Vector, UInt8Vector, UnionVector, VarBinaryVector, VarCharVector, 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, ...)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
List<FieldVector>	getChildrenFromFields() the returned list is the same size as the list passed to initializeChildrenFromFields
long	getDataBufferAddress() Gets the starting address of the underlying buffer associated with data vector
List<ArrowBuf>	getFieldBuffers() (same size as getFieldVectors() since it is their content)
List<BufferBacked>	getFieldInnerVectors()
long	getOffsetBufferAddress() Gets the starting address of the underlying buffer associated with offset vector
long	getValidityBufferAddress() Gets the starting address of the underlying buffer associated with validity vector
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())

インタフェースから継承されたメソッド org.apache.arrow.vector.ValueVector

allocateNew, allocateNewSafe, clear, close, getAllocator, getBuffers, getBufferSize, getBufferSizeFor, getDataBuffer, getField, getMinorType, getNullCount, getObject, getOffsetBuffer, getReader, getTransferPair, getTransferPair, getTransferPair, getValidityBuffer, getValueCapacity, getValueCount, isNull, makeTransferPair, reAlloc, reset, setInitialCapacity, setValueCount

インタフェースから継承されたメソッド java.lang.Iterable

forEach, iterator, spliterator

メソッドの詳細

initializeChildrenFromFields

void initializeChildrenFromFields(List<Field> children)

Initializes the child vectors to be later loaded with loadBuffers

パラメータ:

children - the schema

getChildrenFromFields

List<FieldVector> getChildrenFromFields()

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

戻り値:

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())

パラメータ:

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)

戻り値:

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

getFieldInnerVectors

List<BufferBacked> getFieldInnerVectors()

戻り値:

the inner vectors for this field as defined by the TypeLayout

getValidityBufferAddress

long getValidityBufferAddress()

Gets the starting address of the underlying buffer associated with validity vector

戻り値:

buffer address

getDataBufferAddress

long getDataBufferAddress()

Gets the starting address of the underlying buffer associated with data vector

戻り値:

buffer address

getOffsetBufferAddress

long getOffsetBufferAddress()

Gets the starting address of the underlying buffer associated with offset vector

戻り値:

buffer address