org.apache.lucene.codecs.lucene40

Class Lucene40TermVectorsWriter

java.lang.Object

org.apache.lucene.codecs.TermVectorsWriter

org.apache.lucene.codecs.lucene40.Lucene40TermVectorsWriter

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public final class Lucene40TermVectorsWriter
extends TermVectorsWriter

Lucene 4.0 Term Vectors writer.

It writes .tvd, .tvf, and .tvx files.

See Also:

Lucene40TermVectorsFormat

Constructor Summary

Constructors

Constructor and Description
Lucene40TermVectorsWriter(Directory directory, java.lang.String segment, IOContext context) Sole constructor.

Method Summary

Modifier and Type	Method and Description
void	abort() Aborts writing entirely, implementation should remove any partially-written files, etc.
void	addPosition(int position, int startOffset, int endOffset, BytesRef payload) Adds a term position and offsets
void	addProx(int numProx, DataInput positions, DataInput offsets) Called by IndexWriter when writing new segments.
void	close() Close all streams.
void	finish(FieldInfos fis, int numDocs) Called before TermVectorsWriter.close(), passing in the number of documents that were written.
void	finishDocument() Called after a doc and all its fields have been added.
void	finishTerm() Called after a term and all its positions have been added.
java.util.Comparator<BytesRef>	getComparator() Return the BytesRef Comparator used to sort terms before feeding to this API.
int	merge(MergeState mergeState) Merges in the term vectors from the readers in mergeState.
void	startDocument(int numVectorFields) Called before writing the term vectors of the document.
void	startField(FieldInfo info, int numTerms, boolean positions, boolean offsets, boolean payloads) Called before writing the terms of the field.
void	startTerm(BytesRef term, int freq) Adds a term and its term frequency freq.

Methods inherited from class org.apache.lucene.codecs.TermVectorsWriter

finishField

Methods inherited from class java.lang.Object

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

Constructor Detail

Lucene40TermVectorsWriter

public Lucene40TermVectorsWriter(Directory directory,
                                 java.lang.String segment,
                                 IOContext context)
                          throws java.io.IOException

Sole constructor.

Throws:

java.io.IOException

Method Detail

startDocument

public void startDocument(int numVectorFields)
                   throws java.io.IOException

Description copied from class: TermVectorsWriter

Called before writing the term vectors of the document. TermVectorsWriter.startField(FieldInfo, int, boolean, boolean, boolean) will be called numVectorFields times. Note that if term vectors are enabled, this is called even if the document has no vector fields, in this case numVectorFields will be zero.

Specified by:

startDocument in class TermVectorsWriter

Throws:

java.io.IOException

startField

public void startField(FieldInfo info,
                       int numTerms,
                       boolean positions,
                       boolean offsets,
                       boolean payloads)
                throws java.io.IOException

Description copied from class: TermVectorsWriter

Called before writing the terms of the field. TermVectorsWriter.startTerm(BytesRef, int) will be called numTerms times.

Specified by:

startField in class TermVectorsWriter

Throws:

java.io.IOException

finishDocument

public void finishDocument()
                    throws java.io.IOException

Description copied from class: TermVectorsWriter

Called after a doc and all its fields have been added.

Overrides:

finishDocument in class TermVectorsWriter

Throws:

java.io.IOException

startTerm

public void startTerm(BytesRef term,
                      int freq)
               throws java.io.IOException

Description copied from class: TermVectorsWriter

Adds a term and its term frequency freq. If this field has positions and/or offsets enabled, then TermVectorsWriter.addPosition(int, int, int, BytesRef) will be called freq times respectively.

Specified by:

startTerm in class TermVectorsWriter

Throws:

java.io.IOException

addProx

public void addProx(int numProx,
                    DataInput positions,
                    DataInput offsets)
             throws java.io.IOException

Description copied from class: TermVectorsWriter

Called by IndexWriter when writing new segments.

This is an expert API that allows the codec to consume positions and offsets directly from the indexer.

The default implementation calls TermVectorsWriter.addPosition(int, int, int, BytesRef), but subclasses can override this if they want to efficiently write all the positions, then all the offsets, for example.

NOTE: This API is extremely expert and subject to change or removal!!!

Overrides:

addProx in class TermVectorsWriter

Throws:

java.io.IOException

addPosition

public void addPosition(int position,
                        int startOffset,
                        int endOffset,
                        BytesRef payload)
                 throws java.io.IOException

Description copied from class: TermVectorsWriter

Adds a term position and offsets

Specified by:

addPosition in class TermVectorsWriter

Throws:

java.io.IOException

finishTerm

public void finishTerm()
                throws java.io.IOException

Description copied from class: TermVectorsWriter

Called after a term and all its positions have been added.

Overrides:

finishTerm in class TermVectorsWriter

Throws:

java.io.IOException

abort

public void abort()

Description copied from class: TermVectorsWriter

Aborts writing entirely, implementation should remove any partially-written files, etc.

Specified by:

abort in class TermVectorsWriter

merge

public final int merge(MergeState mergeState)
                throws java.io.IOException

Description copied from class: TermVectorsWriter

Merges in the term vectors from the readers in mergeState. The default implementation skips over deleted documents, and uses TermVectorsWriter.startDocument(int), TermVectorsWriter.startField(FieldInfo, int, boolean, boolean, boolean), TermVectorsWriter.startTerm(BytesRef, int), TermVectorsWriter.addPosition(int, int, int, BytesRef), and TermVectorsWriter.finish(FieldInfos, int), returning the number of documents that were written. Implementations can override this method for more sophisticated merging (bulk-byte copying, etc).

Overrides:

merge in class TermVectorsWriter

Throws:

java.io.IOException

finish

public void finish(FieldInfos fis,
                   int numDocs)

Description copied from class: TermVectorsWriter

Called before TermVectorsWriter.close(), passing in the number of documents that were written. Note that this is intentionally redundant (equivalent to the number of calls to TermVectorsWriter.startDocument(int), but a Codec should check that this is the case to detect the JRE bug described in LUCENE-1282.

Specified by:

finish in class TermVectorsWriter

close

public void close()
           throws java.io.IOException

Close all streams.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class TermVectorsWriter

Throws:

java.io.IOException

getComparator

public java.util.Comparator<BytesRef> getComparator()

Description copied from class: TermVectorsWriter

Return the BytesRef Comparator used to sort terms before feeding to this API.

Specified by:

getComparator in class TermVectorsWriter