Package io.deephaven.engine.table.impl.sources

Class RowPositionColumnSource

java.lang.Object

io.deephaven.engine.table.impl.AbstractColumnSource<Long>

io.deephaven.engine.table.impl.sources.RowPositionColumnSource

All Implemented Interfaces:

ChunkSource<Values>, ChunkSource.WithPrev<Values>, ColumnSource<Long>, ElementSource<Long>, FillContextMaker, GetContextMaker, ColumnSourceGetDefaults.ForLong, ColumnSourceGetDefaults.LongBacked<Long>, DefaultChunkSource<Values>, DefaultChunkSource.WithPrev<Values>, MutableColumnSource<Long>, MutableColumnSourceGetDefaults.ForLong, MutableColumnSourceGetDefaults.LongBacked<Long>, Releasable, TupleExporter<Long>, TupleSource<Long>

public class RowPositionColumnSource
extends AbstractColumnSource<Long>
implements MutableColumnSourceGetDefaults.ForLong

This is a column source that uses no additional memory and maps from row key to row position in the supplied row set.

Nested Class Summary

Nested classes/interfaces inherited from class io.deephaven.engine.table.impl.AbstractColumnSource

AbstractColumnSource.DefaultedImmutable<DATA_TYPE>, AbstractColumnSource.DefaultedMutable<DATA_TYPE>

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>

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

TupleExporter.ExportElementFunction<TUPLE_TYPE>

Field Summary

Fields inherited from class io.deephaven.engine.table.impl.AbstractColumnSource

componentType, type, updateGraph, USE_RANGES_AVERAGE_RUN_LENGTH

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

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

ZERO_LENGTH_COLUMN_SOURCE_ARRAY

Constructor Summary

Constructors

Constructor	Description
RowPositionColumnSource(TrackingRowSet rowSet)

Method Summary

Modifier and Type	Method	Description
void	fillChunk(@NotNull ChunkSource.FillContext context, @NotNull WritableChunk<? super Values> 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 Values> destination, @NotNull RowSequence rowSequence)	Populates the given destination chunk with data corresponding to the keys from the given RowSequence.
long	getLong(long rowKey)	Get the value at the rowKey as a long.
long	getPrevLong(long rowKey)	Get the previous value at the rowKey as a long.

Methods inherited from class io.deephaven.engine.table.impl.AbstractColumnSource

allowsReinterpret, defaultFillChunk, defaultFillPrevChunk, doReinterpret, getComponentType, getPrevSource, getType, match, reinterpret

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.ColumnSource

allowsReinterpret, cast, cast, createPreviousTuple, createTuple, createTupleFromValues, exportAllTo, exportElement, exportElement, getChunkType, getComponentType, getPrevSource, getType, isStateless, match, reinterpret, releaseCachedResources, startTrackingPrevValues, tupleLength

Methods inherited from interface io.deephaven.engine.table.impl.ColumnSourceGetDefaults.ForLong

get

Methods inherited from interface io.deephaven.engine.table.impl.ColumnSourceGetDefaults.LongBacked

getBoolean, getByte, getChar, getDouble, getFloat, getInt, getShort

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

getChunk, getChunk, getChunkByFilling, makeFillContext, makeGetContext

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

getPrevChunk, getPrevChunk, getPrevChunkByFilling

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

makeFillContext

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

makeGetContext

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

isImmutable

Methods inherited from interface io.deephaven.engine.table.impl.MutableColumnSourceGetDefaults.ForLong

getPrev

Methods inherited from interface io.deephaven.engine.table.impl.MutableColumnSourceGetDefaults.LongBacked

getPrevBoolean, getPrevByte, getPrevChar, getPrevDouble, getPrevFloat, getPrevInt, getPrevShort

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

exportAllReinterpretedTo, exportAllReinterpretedTo, exportAllTo, exportElementReinterpreted

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

createTupleFromReinterpretedValues

Constructor Details

RowPositionColumnSource

public RowPositionColumnSource(TrackingRowSet rowSet)

Method Details

getLong

public long getLong(long rowKey)

Description copied from interface: ElementSource

Get the value at the rowKey as a long. RowKeys that are not present are undefined.

Specified by:

getLong in interface ElementSource<Long>

Parameters:

rowKey - the location in key space to get the value from.

Returns:

the long at the rowKey, null values are represented by QueryConstants.NULL_LONG

getPrevLong

public long getPrevLong(long rowKey)

Description copied from interface: ElementSource

Get the previous value at the rowKey as a long. See ElementSource.getPrev(long) for more details.

Specified by:

getPrevLong in interface ElementSource<Long>

Parameters:

rowKey - the location in key space to get the previous value from.

Returns:

the previous long at the rowKey, null values are represented by QueryConstants.NULL_LONG

fillChunk

public void fillChunk(@NotNull
 @NotNull ChunkSource.FillContext context,
 @NotNull
 @NotNull WritableChunk<? super Values> 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<Values>

Overrides:

fillChunk in class AbstractColumnSource<Long>

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 Values> 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<Values>

Overrides:

fillPrevChunk in class AbstractColumnSource<Long>

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