org.apache.lucene.codecs.idversion

Class IDVersionSegmentTermsEnum

java.lang.Object

org.apache.lucene.index.TermsEnum

org.apache.lucene.codecs.idversion.IDVersionSegmentTermsEnum

All Implemented Interfaces:

BytesRefIterator

public final class IDVersionSegmentTermsEnum
extends TermsEnum

Iterates through terms in this field; this class is public so users can cast it to call seekExact(BytesRef, long) for optimistic-concurreny, and also getVersion() to get the version of the currently seek'd term.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.TermsEnum

TermsEnum.SeekStatus

Field Summary

Fields inherited from class org.apache.lucene.index.TermsEnum

EMPTY

Method Summary

Methods

Modifier and Type	Method and Description
int	docFreq()
long	getVersion() Get the version of the currently seek'd term; only valid if we are positioned.
BytesRef	next()
long	ord()
PostingsEnum	postings(PostingsEnum reuse, int flags)
TermsEnum.SeekStatus	seekCeil(BytesRef target)
boolean	seekExact(BytesRef target)
boolean	seekExact(BytesRef target, long minIDVersion) Optimized version of seekExact(BytesRef) that can sometimes fail-fast if the version indexed with the requested ID is less than the specified minIDVersion.
void	seekExact(BytesRef target, TermState otherState)
void	seekExact(long ord)
BytesRef	term()
TermState	termState()
String	toString()
long	totalTermFreq()

Methods inherited from class org.apache.lucene.index.TermsEnum

attributes, docs, docs, docsAndPositions, docsAndPositions, postings

Methods inherited from class java.lang.Object

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

Method Detail

seekExact

public boolean seekExact(BytesRef target)
                  throws IOException

Overrides:

seekExact in class TermsEnum

Throws:

IOException

getVersion

public long getVersion()

Get the version of the currently seek'd term; only valid if we are positioned.

seekExact

public boolean seekExact(BytesRef target,
                long minIDVersion)
                  throws IOException

Optimized version of seekExact(BytesRef) that can sometimes fail-fast if the version indexed with the requested ID is less than the specified minIDVersion. Applications that index a monotonically increasing global version with each document can use this for fast optimistic concurrency.

Throws:

IOException

seekCeil

public TermsEnum.SeekStatus seekCeil(BytesRef target)
                              throws IOException

Specified by:

seekCeil in class TermsEnum

Throws:

IOException

next

public BytesRef next()
              throws IOException

Throws:

IOException

term

public BytesRef term()

Specified by:

term in class TermsEnum

docFreq

public int docFreq()
            throws IOException

Specified by:

docFreq in class TermsEnum

Throws:

IOException

totalTermFreq

public long totalTermFreq()
                   throws IOException

Specified by:

totalTermFreq in class TermsEnum

Throws:

IOException

postings

public PostingsEnum postings(PostingsEnum reuse,
                    int flags)
                      throws IOException

Specified by:

postings in class TermsEnum

Throws:

IOException

seekExact

public void seekExact(BytesRef target,
             TermState otherState)

Overrides:

seekExact in class TermsEnum

termState

public TermState termState()
                    throws IOException

Overrides:

termState in class TermsEnum

Throws:

IOException

seekExact

public void seekExact(long ord)

Specified by:

seekExact in class TermsEnum

ord

public long ord()

Specified by:

ord in class TermsEnum

toString

public String toString()

Overrides:

toString in class Object