Package org.apache.lucene.index

Class SegmentWriteState

java.lang.Object

org.apache.lucene.index.SegmentWriteState

public class SegmentWriteState
extends Object

Holder class for common parameters used during write.

Field Summary

Fields

Modifier and Type	Field	Description
IOContext	context	IOContext for all writes; you should pass this to Directory.createOutput(String,IOContext).
int	delCountOnFlush	Number of deleted documents set while flushing the segment.
Directory	directory	Directory where this segment will be written to.
FieldInfos	fieldInfos	FieldInfos describing all fields in this segment.
InfoStream	infoStream	InfoStream used for debugging messages.
MutableBits	liveDocs	MutableBits recording live documents; this is only set if there is one or more deleted documents.
SegmentInfo	segmentInfo	SegmentInfo describing this segment.
String	segmentSuffix	Unique suffix for any postings files written for this segment.
org.apache.lucene.index.BufferedUpdates	segUpdates	Deletes and updates to apply while we are flushing the segment.
int	termIndexInterval	Expert: The fraction of terms in the "dictionary" which should be stored in RAM.

Constructor Summary

Constructors

Constructor	Description
SegmentWriteState(SegmentWriteState state, String segmentSuffix)	Create a shallow copy of SegmentWriteState with a new segment suffix.
SegmentWriteState(InfoStream infoStream, Directory directory, SegmentInfo segmentInfo, FieldInfos fieldInfos, int termIndexInterval, org.apache.lucene.index.BufferedUpdates segUpdates, IOContext context)	Sole constructor.
SegmentWriteState(InfoStream infoStream, Directory directory, SegmentInfo segmentInfo, FieldInfos fieldInfos, int termIndexInterval, org.apache.lucene.index.BufferedUpdates segUpdates, IOContext context, String segmentSuffix)	Constructor which takes segment suffix.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

infoStream

public final InfoStream infoStream

InfoStream used for debugging messages.

directory

public final Directory directory

Directory where this segment will be written to.

segmentInfo

public final SegmentInfo segmentInfo

SegmentInfo describing this segment.

fieldInfos

public final FieldInfos fieldInfos

FieldInfos describing all fields in this segment.

delCountOnFlush

public int delCountOnFlush

Number of deleted documents set while flushing the segment.

segUpdates

public final org.apache.lucene.index.BufferedUpdates segUpdates

Deletes and updates to apply while we are flushing the segment. A Term is enrolled in here if it was deleted/updated at one point, and it's mapped to the docIDUpto, meaning any docID < docIDUpto containing this term should be deleted/updated.

liveDocs

public MutableBits liveDocs

MutableBits recording live documents; this is only set if there is one or more deleted documents.

segmentSuffix

public final String segmentSuffix

Unique suffix for any postings files written for this segment. PerFieldPostingsFormat sets this for each of the postings formats it wraps. If you create a new PostingsFormat then any files you write/read must be derived using this suffix (use IndexFileNames.segmentFileName(String,String,String)).

termIndexInterval

public int termIndexInterval

Expert: The fraction of terms in the "dictionary" which should be stored in RAM. Smaller values use more memory, but make searching slightly faster, while larger values use less memory and make searching slightly slower. Searching is typically not dominated by dictionary lookup, so tweaking this is rarely useful.

context

public final IOContext context

IOContext for all writes; you should pass this to Directory.createOutput(String,IOContext).

Constructor Detail

SegmentWriteState

public SegmentWriteState(InfoStream infoStream,
                         Directory directory,
                         SegmentInfo segmentInfo,
                         FieldInfos fieldInfos,
                         int termIndexInterval,
                         org.apache.lucene.index.BufferedUpdates segUpdates,
                         IOContext context)

Sole constructor.

SegmentWriteState

public SegmentWriteState(InfoStream infoStream,
                         Directory directory,
                         SegmentInfo segmentInfo,
                         FieldInfos fieldInfos,
                         int termIndexInterval,
                         org.apache.lucene.index.BufferedUpdates segUpdates,
                         IOContext context,
                         String segmentSuffix)

Constructor which takes segment suffix.

See Also:

SegmentWriteState(InfoStream, Directory, SegmentInfo, FieldInfos, int, BufferedUpdates, IOContext)

SegmentWriteState

public SegmentWriteState(SegmentWriteState state,
                         String segmentSuffix)

Create a shallow copy of SegmentWriteState with a new segment suffix.