Package org.apache.druid.segment

Class StringDimensionMergerV9

java.lang.Object

org.apache.druid.segment.DictionaryEncodedColumnMerger<String>

org.apache.druid.segment.StringDimensionMergerV9

All Implemented Interfaces:

DimensionMerger, DimensionMergerV9

public class StringDimensionMergerV9
extends DictionaryEncodedColumnMerger<String>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	StringDimensionMergerV9.SpatialIndexesMerger	Write spatial indexes for string columns that have them

Nested classes/interfaces inherited from class org.apache.druid.segment.DictionaryEncodedColumnMerger

DictionaryEncodedColumnMerger.ConvertingBitmapValues, DictionaryEncodedColumnMerger.ExtendedIndexesMerger, DictionaryEncodedColumnMerger.IndexSeeker, DictionaryEncodedColumnMerger.IndexSeekerWithConversion, DictionaryEncodedColumnMerger.IndexSeekerWithoutConversion

Field Summary

Fields

Modifier and Type	Field	Description
static Comparator<Pair<Integer,com.google.common.collect.PeekingIterator<String>>>	DICTIONARY_MERGING_COMPARATOR

Fields inherited from class org.apache.druid.segment.DictionaryEncodedColumnMerger

adapters, bitmapWriter, capabilities, cardinality, closer, dictionaryMergeIterator, dictionarySize, dictionaryWriter, dimConversions, dimensionName, encodedValueSerializer, firstDictionaryValue, hasNull, indexSpec, nullRowsBitmap, progress, rowCount, segmentWriteOutMedium

Constructor Summary

Constructors

Constructor	Description
StringDimensionMergerV9(String dimensionName, IndexSpec indexSpec, SegmentWriteOutMedium segmentWriteOutMedium, ColumnCapabilities capabilities, ProgressIndicator progress, Closer closer)

Method Summary

Modifier and Type	Method	Description
protected String	coerceValue(String value)
protected Comparator<Pair<Integer,com.google.common.collect.PeekingIterator<String>>>	getDictionaryMergingComparator()
protected DictionaryEncodedColumnMerger.ExtendedIndexesMerger	getExtendedIndexesMerger()
protected Indexed<String>	getNullDimValue()
protected ObjectStrategy<String>	getObjectStrategy()
ColumnDescriptor	makeColumnDescriptor()	Return a ColumnDescriptor containing ColumnPartSerde objects appropriate for this DimensionMerger's value metadata, sequence of row values, and index structures.
protected DictionaryWriter<String>	makeDictionaryWriter(String fileName)

Methods inherited from class org.apache.druid.segment.DictionaryEncodedColumnMerger

convertSortedSegmentRowValuesToMergedRowValues, hasOnlyNulls, mergeBitmaps, processMergedRow, setupEncodedValueWriter, toIndexSeekers, writeDictionary, writeIndexes, writeMergedValueDictionary

Methods inherited from class java.lang.Object

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

Field Detail

DICTIONARY_MERGING_COMPARATOR

public static final Comparator<Pair<Integer,com.google.common.collect.PeekingIterator<String>>> DICTIONARY_MERGING_COMPARATOR

Constructor Detail

StringDimensionMergerV9

public StringDimensionMergerV9(String dimensionName,
                               IndexSpec indexSpec,
                               SegmentWriteOutMedium segmentWriteOutMedium,
                               ColumnCapabilities capabilities,
                               ProgressIndicator progress,
                               Closer closer)

Method Detail

getDictionaryMergingComparator

protected Comparator<Pair<Integer,com.google.common.collect.PeekingIterator<String>>> getDictionaryMergingComparator()

Specified by:

getDictionaryMergingComparator in class DictionaryEncodedColumnMerger<String>

getNullDimValue

protected Indexed<String> getNullDimValue()

Specified by:

getNullDimValue in class DictionaryEncodedColumnMerger<String>

getObjectStrategy

protected ObjectStrategy<String> getObjectStrategy()

Specified by:

getObjectStrategy in class DictionaryEncodedColumnMerger<String>

coerceValue

protected String coerceValue(String value)

Specified by:

coerceValue in class DictionaryEncodedColumnMerger<String>

makeDictionaryWriter

protected DictionaryWriter<String> makeDictionaryWriter(String fileName)

Overrides:

makeDictionaryWriter in class DictionaryEncodedColumnMerger<String>

getExtendedIndexesMerger

@Nullable
protected DictionaryEncodedColumnMerger.ExtendedIndexesMerger getExtendedIndexesMerger()

Overrides:

getExtendedIndexesMerger in class DictionaryEncodedColumnMerger<String>

makeColumnDescriptor

public ColumnDescriptor makeColumnDescriptor()

Description copied from interface: DimensionMergerV9

Return a ColumnDescriptor containing ColumnPartSerde objects appropriate for this DimensionMerger's value metadata, sequence of row values, and index structures.

Returns:

ColumnDescriptor that IndexMergerV9 will use to build a column.