Package org.apache.lucene.index

Class FilterLeafReader.FilterTerms

java.lang.Object

org.apache.lucene.index.Terms

org.apache.lucene.index.FilterLeafReader.FilterTerms

Direct Known Subclasses:

ExitableDirectoryReader.ExitableTerms

Enclosing class:

FilterLeafReader

public abstract static class FilterLeafReader.FilterTerms
extends Terms

Base class for filtering Terms implementations.

NOTE: If the order of terms and documents is not changed, and if these terms are going to be intersected with automata, you could consider overriding Terms.intersect(org.apache.lucene.util.automaton.CompiledAutomaton, org.apache.lucene.util.BytesRef) for better performance.

Field Summary

Fields

Modifier and Type	Field	Description
protected Terms	in	The underlying Terms instance.

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

EMPTY_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FilterTerms(Terms in)	Creates a new FilterTerms

Method Summary

Modifier and Type	Method	Description
int	getDocCount()	Returns the number of documents that have at least one term for this field.
Object	getStats()	Expert: returns additional information about this Terms instance for debugging purposes.
long	getSumDocFreq()	Returns the sum of TermsEnum.docFreq() for all terms in this field.
long	getSumTotalTermFreq()	Returns the sum of TermsEnum.totalTermFreq() for all terms in this field.
boolean	hasFreqs()	Returns true if documents in this field store per-document term frequency (PostingsEnum.freq()).
boolean	hasOffsets()	Returns true if documents in this field store offsets.
boolean	hasPayloads()	Returns true if documents in this field store payloads.
boolean	hasPositions()	Returns true if documents in this field store positions.
TermsEnum	iterator()	Returns an iterator that will step through all terms.
long	size()	Returns the number of terms for this field, or -1 if this measure isn't stored by the codec.

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

getMax, getMin, getTerms, intersect

Methods inherited from class java.lang.Object

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

Field Detail

in

protected final Terms in

The underlying Terms instance.

Constructor Detail

FilterTerms

protected FilterTerms(Terms in)

Creates a new FilterTerms

Parameters:

in - the underlying Terms instance.

Method Detail

iterator

public TermsEnum iterator()
                   throws IOException

Description copied from class: Terms

Returns an iterator that will step through all terms. This method will not return null.

Specified by:

iterator in class Terms

Throws:

IOException

size

public long size()
          throws IOException

Description copied from class: Terms

Returns the number of terms for this field, or -1 if this measure isn't stored by the codec. Note that, just like other term measures, this measure does not take deleted documents into account.

Specified by:

size in class Terms

Throws:

IOException

getSumTotalTermFreq

public long getSumTotalTermFreq()
                         throws IOException

Description copied from class: Terms

Returns the sum of TermsEnum.totalTermFreq() for all terms in this field. Note that, just like other term measures, this measure does not take deleted documents into account.

Specified by:

getSumTotalTermFreq in class Terms

Throws:

IOException

getSumDocFreq

public long getSumDocFreq()
                   throws IOException

Description copied from class: Terms

Returns the sum of TermsEnum.docFreq() for all terms in this field. Note that, just like other term measures, this measure does not take deleted documents into account.

Specified by:

getSumDocFreq in class Terms

Throws:

IOException

getDocCount

public int getDocCount()
                throws IOException

Description copied from class: Terms

Returns the number of documents that have at least one term for this field. Note that, just like other term measures, this measure does not take deleted documents into account.

Specified by:

getDocCount in class Terms

Throws:

IOException

hasFreqs

public boolean hasFreqs()

Description copied from class: Terms

Returns true if documents in this field store per-document term frequency (PostingsEnum.freq()).

Specified by:

hasFreqs in class Terms

hasOffsets

public boolean hasOffsets()

Description copied from class: Terms

Returns true if documents in this field store offsets.

Specified by:

hasOffsets in class Terms

hasPositions

public boolean hasPositions()

Description copied from class: Terms

Returns true if documents in this field store positions.

Specified by:

hasPositions in class Terms

hasPayloads

public boolean hasPayloads()

Description copied from class: Terms

Returns true if documents in this field store payloads.

Specified by:

hasPayloads in class Terms

getStats

public Object getStats()
                throws IOException

Description copied from class: Terms

Expert: returns additional information about this Terms instance for debugging purposes.

Overrides:

getStats in class Terms

Throws:

IOException