Package org.apache.lucene.index

Class MergeState

java.lang.Object

org.apache.lucene.index.MergeState

public class MergeState
extends java.lang.Object

Holds common state used during segment merging.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MergeState.DocMap	A map of doc IDs.

Field Summary

Fields

Modifier and Type	Field	Description
MergeState.DocMap[]	docMaps	Maps document IDs from old segments to document IDs in the new segment
DocValuesProducer[]	docValuesProducers	DocValues producers being merged
FieldInfos[]	fieldInfos	FieldInfos being merged
FieldsProducer[]	fieldsProducers	Postings to merge
InfoStream	infoStream	InfoStream for debugging messages.
(package private) MergeState.DocMap[]	leafDocMaps
Bits[]	liveDocs	Live docs for each reader
int[]	maxDocs	Max docs per reader
FieldInfos	mergeFieldInfos	FieldInfos of the newly merged segment.
boolean	needsIndexSort	Indicates if the index needs to be sorted
NormsProducer[]	normsProducers	Norms producers being merged
PointsReader[]	pointsReaders	Point readers to merge
SegmentInfo	segmentInfo	SegmentInfo of the newly merged segment.
StoredFieldsReader[]	storedFieldsReaders	Stored field producers being merged
TermVectorsReader[]	termVectorsReaders	Term vector producers being merged

Constructor Summary

Constructors

Constructor	Description
MergeState(java.util.List<CodecReader> originalReaders, SegmentInfo segmentInfo, InfoStream infoStream)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
private MergeState.DocMap[]	buildDeletionDocMaps(java.util.List<CodecReader> readers)
private MergeState.DocMap[]	buildDocMaps(java.util.List<CodecReader> readers, Sort indexSort)
private java.util.List<CodecReader>	maybeSortReaders(java.util.List<CodecReader> originalReaders, SegmentInfo segmentInfo)
(package private) static PackedLongValues	removeDeletes(int maxDoc, Bits liveDocs)

Methods inherited from class java.lang.Object

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

Field Detail

docMaps

public final MergeState.DocMap[] docMaps

Maps document IDs from old segments to document IDs in the new segment

leafDocMaps

final MergeState.DocMap[] leafDocMaps

segmentInfo

public final SegmentInfo segmentInfo

SegmentInfo of the newly merged segment.

mergeFieldInfos

public FieldInfos mergeFieldInfos

FieldInfos of the newly merged segment.

storedFieldsReaders

public final StoredFieldsReader[] storedFieldsReaders

Stored field producers being merged

termVectorsReaders

public final TermVectorsReader[] termVectorsReaders

Term vector producers being merged

normsProducers

public final NormsProducer[] normsProducers

Norms producers being merged

docValuesProducers

public final DocValuesProducer[] docValuesProducers

DocValues producers being merged

fieldInfos

public final FieldInfos[] fieldInfos

FieldInfos being merged

liveDocs

public final Bits[] liveDocs

Live docs for each reader

fieldsProducers

public final FieldsProducer[] fieldsProducers

Postings to merge

pointsReaders

public final PointsReader[] pointsReaders

Point readers to merge

maxDocs

public final int[] maxDocs

Max docs per reader

infoStream

public final InfoStream infoStream

InfoStream for debugging messages.

needsIndexSort

public boolean needsIndexSort

Indicates if the index needs to be sorted

Constructor Detail

MergeState

MergeState(java.util.List<CodecReader> originalReaders,
           SegmentInfo segmentInfo,
           InfoStream infoStream)
    throws java.io.IOException

Sole constructor.

Throws:

java.io.IOException

Method Detail

buildDeletionDocMaps

private MergeState.DocMap[] buildDeletionDocMaps(java.util.List<CodecReader> readers)

buildDocMaps

private MergeState.DocMap[] buildDocMaps(java.util.List<CodecReader> readers,
                                         Sort indexSort)
                                  throws java.io.IOException

Throws:

java.io.IOException

maybeSortReaders

private java.util.List<CodecReader> maybeSortReaders(java.util.List<CodecReader> originalReaders,
                                                     SegmentInfo segmentInfo)
                                              throws java.io.IOException

Throws:

java.io.IOException

removeDeletes

static PackedLongValues removeDeletes(int maxDoc,
                                      Bits liveDocs)