org.apache.arrow.vector

Class VectorUnloader

java.lang.Object

org.apache.arrow.vector.VectorUnloader

public class VectorUnloader
extends Object

Helper class that handles converting a VectorSchemaRoot to a ArrowRecordBatch.

Constructor Summary

Constructors

Constructor and Description
VectorUnloader(VectorSchemaRoot root) Constructs a new instance of the given set of vectors.
VectorUnloader(VectorSchemaRoot root, boolean includeNullCount, boolean alignBuffers) Constructs a new instance.
VectorUnloader(VectorSchemaRoot root, boolean includeNullCount, CompressionCodec codec, boolean alignBuffers) Constructs a new instance.

Method Summary

Modifier and Type	Method and Description
ArrowRecordBatch	getRecordBatch() Performs the depth first traversal of the Vectors to create an ArrowRecordBatch suitable for serialization.

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorUnloader

public VectorUnloader(VectorSchemaRoot root)

Constructs a new instance of the given set of vectors.

VectorUnloader

public VectorUnloader(VectorSchemaRoot root,
                      boolean includeNullCount,
                      boolean alignBuffers)

Constructs a new instance.

Parameters:

root - The set of vectors to serialize to an ArrowRecordBatch.

includeNullCount - Controls whether null count is copied to the ArrowRecordBatch

alignBuffers - Controls if buffers get aligned to 8-byte boundaries.

VectorUnloader

public VectorUnloader(VectorSchemaRoot root,
                      boolean includeNullCount,
                      CompressionCodec codec,
                      boolean alignBuffers)

Constructs a new instance.

Parameters:

root - The set of vectors to serialize to an ArrowRecordBatch.

includeNullCount - Controls whether null count is copied to the ArrowRecordBatch

codec - the codec for compressing data. If it is null, then no compression is needed.

alignBuffers - Controls if buffers get aligned to 8-byte boundaries.

Method Detail

getRecordBatch

public ArrowRecordBatch getRecordBatch()

Performs the depth first traversal of the Vectors to create an ArrowRecordBatch suitable for serialization.