Package com.illumon.iris.db.v2.sources

Class EmptyToNullStringRegionedColumnSource<STRING_LIKE_TYPE extends CharSequence>

java.lang.Object

com.illumon.iris.db.v2.sources.AbstractColumnSource<STRING_LIKE_TYPE>

com.illumon.iris.db.v2.sources.EmptyToNullStringRegionedColumnSource<STRING_LIKE_TYPE>

All Implemented Interfaces:

ChunkSource<Attributes.Values>, ChunkSource.WithPrev<Attributes.Values>, DefaultChunkSource<Attributes.Values>, DefaultChunkSource.WithPrev<Attributes.Values>, FillContextMaker, GetContextMaker, ColumnSource<STRING_LIKE_TYPE>, ColumnSourceGetDefaults.ForObject<STRING_LIKE_TYPE>, ElementSource<STRING_LIKE_TYPE>, MutableColumnSource<STRING_LIKE_TYPE>, MutableColumnSourceGetDefaults.ForObject<STRING_LIKE_TYPE>, Releasable, TupleExporter<STRING_LIKE_TYPE>, TupleSource<STRING_LIKE_TYPE>, Serializable

public class EmptyToNullStringRegionedColumnSource<STRING_LIKE_TYPE extends CharSequence>
extends AbstractColumnSource<STRING_LIKE_TYPE>
implements MutableColumnSourceGetDefaults.ForObject<STRING_LIKE_TYPE>

Regioned ColumnSource that replaces empty CharSequences with null.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.illumon.iris.db.v2.sources.AbstractColumnSource

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

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.sources.chunk.ChunkSource

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

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.sources.chunk.DefaultChunkSource

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

Field Summary

Fields inherited from class com.illumon.iris.db.v2.sources.AbstractColumnSource

componentType, type

Fields inherited from interface com.illumon.iris.db.v2.sources.chunk.ChunkSource

DEFAULT_FILL_INSTANCE, ZERO_LENGTH_CHUNK_SOURCE_ARRAY

Fields inherited from interface com.illumon.iris.db.v2.sources.chunk.ChunkSource.WithPrev

ZERO_LENGTH_CHUNK_SOURCE_WITH_PREV_ARRAY

Fields inherited from interface com.illumon.iris.db.v2.sources.ColumnSource

ZERO_LENGTH_COLUMN_SOURCE_ARRAY

Constructor Summary

Constructors

Constructor	Description
EmptyToNullStringRegionedColumnSource(ColumnSource<STRING_LIKE_TYPE> innerSource, Runnable callback)	Wrap inner source with a column source that replaces empty values with null.

Method Summary

Modifier and Type	Method	Description
STRING_LIKE_TYPE	get(long index)	Get the value from the source.
GroupingBuilder	getGroupingBuilder()	Get a GroupingBuilder to construct grouping tables for this column.
STRING_LIKE_TYPE	getPrev(long index)	Get the previous value at the index.
boolean	isImmutable()	Determine if this column source is immutable, meaning that the values at a given index key never change.
void	releaseCachedResources()	Release any resources held for caching purposes.
static <STRING_LIKE_TYPE extends CharSequence> STRING_LIKE_TYPE	replaceEmptyWithNull(boolean isCompressed, STRING_LIKE_TYPE inputValue)

Methods inherited from class com.illumon.iris.db.v2.sources.AbstractColumnSource

allowsReinterpret, defaultFillChunk, doReinterpret, fillChunk, fillPrevChunk, getComponentType, getGroupingProvider, getNativeType, getType, hasGrouping, isSerializable, match, reinterpret, setGroupingProvider

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.ChunkSource

fillChunk, getChunkType

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.ChunkSource.WithPrev

fillPrevChunk

Methods inherited from interface com.illumon.iris.db.v2.sources.ColumnSource

allowsReinterpret, cast, createPreviousTuple, createTuple, createTupleFromValues, exportElement, exportElement, exportToExternalKey, getColumnSources, getComponentType, getGroupingProvider, getNativeType, getPrevSource, getType, hasGrouping, match, reinterpret, setGroupingProvider, startTrackingPrevValues

Methods inherited from interface com.illumon.iris.db.v2.sources.ColumnSourceGetDefaults.ForObject

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

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.DefaultChunkSource

getChunk, getChunk, getChunkByFilling, makeFillContext, makeGetContext

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.DefaultChunkSource.WithPrev

getPrevChunk, getPrevChunk, getPrevChunkByFilling

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.FillContextMaker

makeFillContext

Methods inherited from interface com.illumon.iris.db.v2.sources.chunk.GetContextMaker

makeGetContext

Methods inherited from interface com.illumon.iris.db.v2.sources.MutableColumnSourceGetDefaults.ForObject

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

Methods inherited from interface com.illumon.iris.db.v2.tuples.TupleExporter

exportElementReinterpreted

Methods inherited from interface com.illumon.iris.db.v2.tuples.TupleSource

createTupleFromReinterpretedValues

Constructor Details

EmptyToNullStringRegionedColumnSource

public EmptyToNullStringRegionedColumnSource(@NotNull ColumnSource<STRING_LIKE_TYPE> innerSource, @Nullable Runnable callback)

Wrap inner source with a column source that replaces empty values with null. Callback will be invoked on the first occasion for remapping (modulo race conditions which may permit it to be invoked more than once).

Parameters:

innerSource - The inner source

callback - The callback

Method Details

get

public STRING_LIKE_TYPE get(long index)

Description copied from interface: ElementSource

Get the value from the source. This may return boxed values for basic types.

Specified by:

get in interface ElementSource<STRING_LIKE_TYPE extends CharSequence>

Parameters:

index - the location in index space to get the value from.

Returns:

the value at the index, potentially null.

getPrev

public STRING_LIKE_TYPE getPrev(long index)

Description copied from interface: ElementSource

Get the previous value at the index. Previous values are used during an LTM update cycle to process changes in data. During normal operation previous values will be identical to current values.

Specified by:

getPrev in interface ElementSource<STRING_LIKE_TYPE extends CharSequence>

Parameters:

index - the location in index space to get the value from.

Returns:

the previous value at the index, or null.

isImmutable

public boolean isImmutable()

Description copied from interface: ColumnSource

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

Specified by:

isImmutable in interface ColumnSource<STRING_LIKE_TYPE extends CharSequence>

Specified by:

isImmutable in interface MutableColumnSource<STRING_LIKE_TYPE extends CharSequence>

Returns:

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

releaseCachedResources

public void releaseCachedResources()

Description copied from interface: ColumnSource

Release any resources held for caching purposes. Implementations need not guarantee that concurrent accesses are correct, as the purpose of this method is to ensure cleanup for column sources that will no longer be used.

Specified by:

releaseCachedResources in interface ColumnSource<STRING_LIKE_TYPE extends CharSequence>

Specified by:

releaseCachedResources in interface Releasable

replaceEmptyWithNull

public static <STRING_LIKE_TYPE extends CharSequence> STRING_LIKE_TYPE replaceEmptyWithNull(boolean isCompressed, STRING_LIKE_TYPE inputValue)

getGroupingBuilder

public GroupingBuilder getGroupingBuilder()

Description copied from interface: ColumnSource

Get a GroupingBuilder to construct grouping tables for this column. Use ColumnSource.hasGrouping() to determine if this column has a grouping.

Specified by:

getGroupingBuilder in interface ColumnSource<STRING_LIKE_TYPE extends CharSequence>

Overrides:

getGroupingBuilder in class AbstractColumnSource<STRING_LIKE_TYPE extends CharSequence>

Returns:

a GroupingBuilder if this column supports grouping.