Package io.deephaven.engine.table.impl.util

Class InverseWrappedRowSetRowRedirection

java.lang.Object

io.deephaven.engine.table.impl.util.InverseWrappedRowSetRowRedirection

All Implemented Interfaces:

ChunkSource<RowKeys>, ChunkSource.WithPrev<RowKeys>, FillContextMaker, GetContextMaker, DefaultChunkSource<RowKeys>, DefaultChunkSource.WithPrev<RowKeys>, FillUnordered<RowKeys>, RowRedirection

public class InverseWrappedRowSetRowRedirection
extends Object
implements RowRedirection

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
InverseWrappedRowSetRowRedirection(RowSet wrappedRowSet)	This class accepts a RowSet and attempts to cast to a TrackingRowSet if getPrev(long) or fillPrevChunk(FillContext, WritableChunk, RowSequence) is called.

Method Summary

Modifier and Type	Method	Description
boolean	ascendingMapping()	If this RowRedirection is guaranteed to map outer keys in ascending order to inner keys in ascending order; then return true; all other redirections must return false.
void	fillChunk(@NotNull ChunkSource.FillContext fillContext, @NotNull WritableChunk<? super RowKeys> mappedKeysOut, @NotNull RowSequence keysToMap)	Lookup each element in a RowSequence and write the result to a WritableLongChunk.
void	fillPrevChunk(@NotNull ChunkSource.FillContext fillContext, @NotNull WritableChunk<? super RowKeys> mappedKeysOut, @NotNull RowSequence keysToMap)	Lookup each element in a RowSequence using previous values and write the result to a WritableLongChunk.
long	get(long key)	Simple redirected lookup.
long	getPrev(long key)	Simple redirected lookup, using previous values.
String	toString()

Methods inherited from class java.lang.Object

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

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, getPrevSource

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.util.RowRedirection

fillChunkUnordered, fillPrevChunkUnordered, getChunkType, isWritable, providesFillUnordered, writableCast

Constructor Details

InverseWrappedRowSetRowRedirection

public InverseWrappedRowSetRowRedirection(RowSet wrappedRowSet)

This class accepts a RowSet and attempts to cast to a TrackingRowSet if getPrev(long) or fillPrevChunk(FillContext, WritableChunk, RowSequence) is called. Calling these functions on a non-tracking RowSet will result in a ClassCastException.

Parameters:

wrappedRowSet - the RowSet (or TrackingRowSet) to use as the redirection source

Method Details

ascendingMapping

public boolean ascendingMapping()

Description copied from interface: RowRedirection

If this RowRedirection is guaranteed to map outer keys in ascending order to inner keys in ascending order; then return true; all other redirections must return false.

Specified by:

ascendingMapping in interface RowRedirection

Returns:

if our output maintains ascending order

get

public long get(long key)

Description copied from interface: RowRedirection

Simple redirected lookup.

Specified by:

get in interface RowRedirection

Parameters:

key - The "outer" row key

Returns:

The corresponding "inner" row key, or RowSequence.NULL_ROW_KEY if no mapping exists

getPrev

public long getPrev(long key)

Description copied from interface: RowRedirection

Simple redirected lookup, using previous values.

Specified by:

getPrev in interface RowRedirection

Parameters:

key - The "outer" row key

Returns:

The corresponding "inner" row key, or RowSequence.NULL_ROW_KEY if no mapping exists

fillChunk

public void fillChunk(@NotNull
 @NotNull ChunkSource.FillContext fillContext,
 @NotNull
 @NotNull WritableChunk<? super RowKeys> mappedKeysOut,
 @NotNull
 @NotNull RowSequence keysToMap)

Description copied from interface: RowRedirection

Lookup each element in a RowSequence and write the result to a WritableLongChunk.

Specified by:

fillChunk in interface ChunkSource<RowKeys>

Specified by:

fillChunk in interface RowRedirection

Parameters:

fillContext - The fill context

mappedKeysOut - The result WritableLongChunk

keysToMap - The row keys to lookup in this RowRedirection

fillPrevChunk

public void fillPrevChunk(@NotNull
 @NotNull ChunkSource.FillContext fillContext,
 @NotNull
 @NotNull WritableChunk<? super RowKeys> mappedKeysOut,
 @NotNull
 @NotNull RowSequence keysToMap)

Description copied from interface: RowRedirection

Lookup each element in a RowSequence using previous values and write the result to a WritableLongChunk.

Specified by:

fillPrevChunk in interface ChunkSource.WithPrev<RowKeys>

Specified by:

fillPrevChunk in interface RowRedirection

Parameters:

fillContext - The fill context

mappedKeysOut - The result WritableLongChunk

keysToMap - The row keys to lookup in this RowRedirection

toString

public String toString()

Overrides:

toString in class Object