Package io.deephaven.engine.table.impl.by.ssmcountdistinct

Class ByteSsmBackedSource

java.lang.Object

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

io.deephaven.engine.table.impl.by.ssmcountdistinct.ByteSsmBackedSource

All Implemented Interfaces:

ChunkSource<Values>, ChunkSource.WithPrev<Values>, ColumnSource<ByteVector>, ElementSource<ByteVector>, FillContextMaker, GetContextMaker, SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>, ColumnSourceGetDefaults.ForObject<ByteVector>, DefaultChunkSource<Values>, DefaultChunkSource.WithPrev<Values>, MutableColumnSource<ByteVector>, MutableColumnSourceGetDefaults.ForObject<ByteVector>, Releasable, TupleExporter<ByteVector>, TupleSource<ByteVector>

public class ByteSsmBackedSource
extends AbstractColumnSource<ByteVector>
implements ColumnSourceGetDefaults.ForObject<ByteVector>, MutableColumnSourceGetDefaults.ForObject<ByteVector>, SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

A SsmBackedColumnSource for Bytes.

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>

Field Summary

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

componentType, groupToRange, rowSetIndexerKey, 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
ByteSsmBackedSource()

Method Summary

Modifier and Type	Method	Description
void	clear(long key)	Set the SSM at the specified key to null
void	clearDeltas(RowSet indices)	Clear out any tracked deltas from recent computations.
void	ensureCapacity(long capacity)	Ensure the source has at least `capacity` capacity
ByteVector	get(long rowKey)	Get the value from the source.
ByteSegmentedSortedMultiset	getCurrentSsm(long key)	Get the current SSM at the specified key.
ByteSegmentedSortedMultiset	getOrCreate(long key)	Get the ssm at the specified key, creating one if none existed.
ByteVector	getPrev(long rowKey)	Get the previous value at the rowKey.
ObjectArraySource<ByteSegmentedSortedMultiset>	getUnderlyingSource()
boolean	isImmutable()	Determine if this column source is immutable, meaning that the values at a given row key never change.
void	startTrackingPrevValues()	ColumnSource implementations that track previous values have the option to not actually start tracking previous values until this method is called.

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

allowsReinterpret, defaultFillChunk, defaultFillPrevChunk, doReinterpret, fillChunk, fillPrevChunk, getColumnSources, getComponentType, getGroupToRange, getGroupToRange, getPrevSource, getType, getValuesMapping, match, reinterpret, setGroupToRange

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.ChunkSource

fillChunk

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

fillPrevChunk

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

allowsReinterpret, cast, cast, createPreviousTuple, createTuple, createTupleFromValues, exportElement, exportElement, getChunkType, getComponentType, getGroupToRange, getGroupToRange, getPrevSource, getType, getValuesMapping, isStateless, match, reinterpret, releaseCachedResources

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

getBoolean, getByte, getChar, getDouble, getFloat, getInt, getLong, 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.MutableColumnSourceGetDefaults.ForObject

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

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

exportElementReinterpreted

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

createTupleFromReinterpretedValues, getColumnSources

Constructor Details

ByteSsmBackedSource

public ByteSsmBackedSource()

Method Details

getOrCreate

public ByteSegmentedSortedMultiset getOrCreate(long key)

Description copied from interface: SsmBackedColumnSource

Get the ssm at the specified key, creating one if none existed. This method will update the current previous tracking state of the SSM.

Specified by:

getOrCreate in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

Parameters:

key - the key to get the ssm for.

Returns:

the SSM at the key, or a new one.

getCurrentSsm

public ByteSegmentedSortedMultiset getCurrentSsm(long key)

Description copied from interface: SsmBackedColumnSource

Get the current SSM at the specified key. This does not permute it in any way.

Specified by:

getCurrentSsm in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

Parameters:

key - the key to get the ssm for.

Returns:

the SSM

clear

public void clear(long key)

Description copied from interface: SsmBackedColumnSource

Set the SSM at the specified key to null

Specified by:

clear in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

Parameters:

key - the key to get the ssm for.

ensureCapacity

public void ensureCapacity(long capacity)

Description copied from interface: SsmBackedColumnSource

Ensure the source has at least `capacity` capacity

Specified by:

ensureCapacity in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

Parameters:

capacity - the capacity to ensure.

getUnderlyingSource

public ObjectArraySource<ByteSegmentedSortedMultiset> getUnderlyingSource()

Specified by:

getUnderlyingSource in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

isImmutable

public boolean isImmutable()

Description copied from interface: ColumnSource

Determine if this column source is immutable, meaning that the values at a given row key never change.

Specified by:

isImmutable in interface ColumnSource<ByteVector>

Specified by:

isImmutable in interface MutableColumnSource<ByteVector>

Returns:

true if the values at a given row key of the column source never change, false otherwise

get

public ByteVector get(long rowKey)

Description copied from interface: ElementSource

Get the value from the source. This may return boxed values for basic types. RowKeys that are not present are undefined.

Specified by:

get in interface ElementSource<ByteVector>

Parameters:

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

Returns:

the value at the rowKey, potentially null.

getPrev

public ByteVector getPrev(long rowKey)

Description copied from interface: ElementSource

Get the previous value at the rowKey. Previous values are used during an UG update cycle to process changes in data. During normal operation previous values will be identical to current values. RowKeys that were not present are undefined.

Specified by:

getPrev in interface ElementSource<ByteVector>

Parameters:

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

Returns:

the previous value at the rowKey, potentially null.

startTrackingPrevValues

public void startTrackingPrevValues()

Description copied from interface: ColumnSource

ColumnSource implementations that track previous values have the option to not actually start tracking previous values until this method is called. This is an option, not an obligation: some simple ColumnSource implementations (like TSingleValueSource for various T) always track previous values; other implementations (like PrevColumnSource) never do; some (like TArrayColumnSource) only start tracking once this method is called. An immutable column source can not have distinct prev values; therefore it is implemented as a no-op.

Specified by:

startTrackingPrevValues in interface ColumnSource<ByteVector>

clearDeltas

public void clearDeltas(RowSet indices)

Description copied from interface: SsmBackedColumnSource

Clear out any tracked deltas from recent computations.

Specified by:

clearDeltas in interface SsmBackedColumnSource<ByteSegmentedSortedMultiset,ByteVector>

Parameters:

indices - the set of indices to clear deltas for.