Package io.deephaven.extensions.barrage.chunk

Class MapChunkReader<T>

java.lang.Object

io.deephaven.extensions.barrage.chunk.BaseChunkReader<WritableObjectChunk<T,Values>>

io.deephaven.extensions.barrage.chunk.MapChunkReader<T>

All Implemented Interfaces:

ChunkReader<WritableObjectChunk<T,Values>>

public class MapChunkReader<T>
extends BaseChunkReader<WritableObjectChunk<T,Values>>

Nested Class Summary

Nested classes/interfaces inherited from class io.deephaven.extensions.barrage.chunk.BaseChunkReader

BaseChunkReader.ChunkTransformer<READ_CHUNK_TYPE extends Chunk<Values>,DEST_CHUNK_TYPE extends WritableChunk<Values>>

Nested classes/interfaces inherited from interface io.deephaven.extensions.barrage.chunk.ChunkReader

ChunkReader.Factory

Constructor Summary

Constructors

Constructor	Description
MapChunkReader(ChunkReader<? extends WritableChunk<Values>> keyReader, ChunkReader<? extends WritableChunk<Values>> valueReader)

Method Summary

Modifier and Type	Method	Description
WritableObjectChunk<T,Values>	readChunk(@NotNull Iterator<ChunkWriter.FieldNodeInfo> fieldNodeIter, PrimitiveIterator.OfLong bufferInfoIter, @NotNull DataInput is, @Nullable WritableChunk<Values> outChunk, int outOffset, int totalRows)	Reads the given DataInput to extract the next Arrow buffer as a Deephaven Chunk.

Methods inherited from class io.deephaven.extensions.barrage.chunk.BaseChunkReader

castOrCreateChunk, getChunkTypeFor, readValidityBuffer

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.deephaven.extensions.barrage.chunk.ChunkReader

readChunk

Constructor Details

MapChunkReader

public MapChunkReader(ChunkReader<? extends WritableChunk<Values>> keyReader,
 ChunkReader<? extends WritableChunk<Values>> valueReader)

Method Details

readChunk

public WritableObjectChunk<T,Values> readChunk(@NotNull
 @NotNull Iterator<ChunkWriter.FieldNodeInfo> fieldNodeIter,
 @NotNull
 PrimitiveIterator.OfLong bufferInfoIter,
 @NotNull
 @NotNull DataInput is,
 @Nullable
 @Nullable WritableChunk<Values> outChunk,
 int outOffset,
 int totalRows)
                                        throws IOException

Description copied from interface: ChunkReader

Reads the given DataInput to extract the next Arrow buffer as a Deephaven Chunk.

Parameters:

fieldNodeIter - iterator to read fields from the stream

bufferInfoIter - iterator to read buffers from the stream

is - input stream containing buffers to be read

outChunk - chunk to write to

outOffset - offset within the outChunk to begin writing

totalRows - total rows to write to the outChunk

Returns:

a Chunk containing the data from the stream

Throws:

IOException - if an error occurred while reading the stream