Package io.deephaven.engine.table.impl.select

Class VectorChunkAdapter<ATTR extends Any>

java.lang.Object

io.deephaven.engine.table.impl.select.VectorChunkAdapter<ATTR>

All Implemented Interfaces:

ChunkSource<ATTR>, ChunkSource.WithPrev<ATTR>, FillContextMaker, GetContextMaker, DefaultChunkSource<ATTR>, DefaultChunkSource.WithPrev<ATTR>

public class VectorChunkAdapter<ATTR extends Any>
extends Object
implements DefaultChunkSource.WithPrev<ATTR>

This class wraps an inner ChunkSource holding a Vector. The purpose of doing so is to apply Vector#getDirect to the underlying Vector values returned by the underlying ChunkSource. This is the strategy for implementing this class: makeGetContext() - doesn't need to change. The default implementation in our parent, namely DefaultChunkSource#makeGetContext, already does the right thing. getChunk() - likewise. makeFillContext() - We don't need to add anything to the "inner" context, so we just delegate to inner and return its context fillContext() - We first let the inner fill the chunk, then we overwrite each value (where non-null) with the result of Vector#getDirect() invoked on that value.

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.engine.table.ChunkSource

ChunkSource.FillContext, ChunkSource.GetContext, ChunkSource.WithPrev<ATTR extends Any>

Nested classes/interfaces inherited from interface io.deephaven.engine.table.impl.DefaultChunkSource

DefaultChunkSource.SupportsContiguousGet<ATTR extends Any>, DefaultChunkSource.WithPrev<ATTR extends Any>

Field Summary

Fields inherited from interface io.deephaven.engine.table.ChunkSource

DEFAULT_FILL_INSTANCE, ZERO_LENGTH_CHUNK_SOURCE_ARRAY

Fields inherited from interface io.deephaven.engine.table.ChunkSource.WithPrev

ZERO_LENGTH_CHUNK_SOURCE_WITH_PREV_ARRAY

Constructor Summary

Constructors

Constructor	Description
VectorChunkAdapter(ChunkSource.WithPrev<ATTR> underlying)

Method Summary

Modifier and Type	Method	Description
void	fillChunk(@NotNull ChunkSource.FillContext context, @NotNull WritableChunk<? super ATTR> destination, @NotNull RowSequence rowSequence)	Populates the given destination chunk with data corresponding to the keys from the given RowSequence.
void	fillPrevChunk(@NotNull ChunkSource.FillContext context, @NotNull WritableChunk<? super ATTR> destination, @NotNull RowSequence rowSequence)	Populates the given destination chunk with data corresponding to the keys from the given RowSequence.
ChunkType	getChunkType()	Get the most suitable ChunkType for use with this ChunkSource.
ChunkSource.FillContext	makeFillContext(int chunkCapacity, SharedContext sharedContext)	Allocate a new ChunkSource.FillContext for filling chunks from this FillContextMaker, typically a ChunkSource.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.deephaven.engine.table.impl.DefaultChunkSource

getChunk, getChunk, getChunkByFilling, makeGetContext

Methods inherited from interface io.deephaven.engine.table.impl.DefaultChunkSource.WithPrev

getPrevChunk, getPrevChunk, getPrevChunkByFilling, getPrevSource

Methods inherited from interface io.deephaven.engine.table.FillContextMaker

makeFillContext

Methods inherited from interface io.deephaven.engine.table.GetContextMaker

makeGetContext

Constructor Details

VectorChunkAdapter

public VectorChunkAdapter(ChunkSource.WithPrev<ATTR> underlying)

Method Details

getChunkType

public ChunkType getChunkType()

Description copied from interface: ChunkSource

Get the most suitable ChunkType for use with this ChunkSource.

Specified by:

getChunkType in interface ChunkSource<ATTR extends Any>

Returns:

The ChunkType

fillChunk

public void fillChunk(@NotNull
 @NotNull ChunkSource.FillContext context,
 @NotNull
 @NotNull WritableChunk<? super ATTR> destination,
 @NotNull
 @NotNull RowSequence rowSequence)

Description copied from interface: ChunkSource

Populates the given destination chunk with data corresponding to the keys from the given RowSequence.

Specified by:

fillChunk in interface ChunkSource<ATTR extends Any>

Parameters:

context - A context containing all mutable/state related data used in retrieving the Chunk.

destination - The chunk to be populated according to rowSequence. No assumptions shall be made about the size of the chunk shall be made. The chunk will be populated from position [0,rowSequence.size()).

rowSequence - An RowSequence representing the keys to be fetched

fillPrevChunk

public void fillPrevChunk(@NotNull
 @NotNull ChunkSource.FillContext context,
 @NotNull
 @NotNull WritableChunk<? super ATTR> destination,
 @NotNull
 @NotNull RowSequence rowSequence)

Description copied from interface: ChunkSource.WithPrev

Populates the given destination chunk with data corresponding to the keys from the given RowSequence.

Specified by:

fillPrevChunk in interface ChunkSource.WithPrev<ATTR extends Any>

Parameters:

context - A context containing all mutable/state related data used in retrieving the Chunk.

destination - The chunk to be populated according to rowSequence. No assumptions shall be made about the size of the chunk shall be made. The chunk will be populated from position [0,rowSequence.size()).

rowSequence - An RowSequence representing the keys to be fetched

makeFillContext

public ChunkSource.FillContext makeFillContext(int chunkCapacity,
 SharedContext sharedContext)

Description copied from interface: FillContextMaker

Allocate a new ChunkSource.FillContext for filling chunks from this FillContextMaker, typically a ChunkSource.

Specified by:

makeFillContext in interface DefaultChunkSource<ATTR extends Any>

Specified by:

makeFillContext in interface FillContextMaker

Parameters:

chunkCapacity - The maximum size of any WritableChunk that will be filled with this context

sharedContext - Shared store of intermediate results.

Returns:

A context for use with fill operations