Package org.apache.lucene.codecs

Class BlockTreeTermsReader.FieldReader

java.lang.Object

org.apache.lucene.index.Terms

org.apache.lucene.codecs.BlockTreeTermsReader.FieldReader

Enclosing class:

BlockTreeTermsReader

public final class BlockTreeTermsReader.FieldReader
extends Terms

BlockTree's implementation of Terms.

Field Summary

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

EMPTY_ARRAY

Method Summary

Modifier and Type	Method	Description
BlockTreeTermsReader.Stats	computeStats()	For debugging -- used by CheckIndex too
java.util.Comparator<BytesRef>	getComparator()	Return the BytesRef Comparator used to sort terms provided by the iterator.
int	getDocCount()	Returns the number of documents that have at least one term for this field, or -1 if this measure isn't stored by the codec.
long	getSumDocFreq()	Returns the sum of TermsEnum.docFreq() for all terms in this field, or -1 if this measure isn't stored by the codec.
long	getSumTotalTermFreq()	Returns the sum of TermsEnum.totalTermFreq() for all terms in this field, or -1 if this measure isn't stored by the codec (or if this fields omits term freq and positions).
boolean	hasFreqs()	Returns true if documents in this field store per-document term frequency (DocsEnum.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	intersect(CompiledAutomaton compiled, BytesRef startTerm)	Returns a TermsEnum that iterates over all terms that are accepted by the provided CompiledAutomaton.
TermsEnum	iterator(TermsEnum reuse)	Returns an iterator that will step through all terms.
long	ramBytesUsed()	Returns approximate RAM bytes used
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 java.lang.Object

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

Method Detail

computeStats

public BlockTreeTermsReader.Stats computeStats()
                                        throws java.io.IOException

For debugging -- used by CheckIndex too

Throws:

java.io.IOException

getComparator

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

Description copied from class: Terms

Return the BytesRef Comparator used to sort terms provided by the iterator. This method may return null if there are no terms. This method may be invoked many times; it's best to cache a single instance & reuse it.

Specified by:

getComparator in class Terms

hasFreqs

public boolean hasFreqs()

Description copied from class: Terms

Returns true if documents in this field store per-document term frequency (DocsEnum.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

iterator

public TermsEnum iterator(TermsEnum reuse)
                   throws java.io.IOException

Description copied from class: Terms

Returns an iterator that will step through all terms. This method will not return null. If you have a previous TermsEnum, for example from a different field, you can pass it for possible reuse if the implementation can do so.

Specified by:

iterator in class Terms

Throws:

java.io.IOException

size

public long size()

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

getSumTotalTermFreq

public long getSumTotalTermFreq()

Description copied from class: Terms

Returns the sum of TermsEnum.totalTermFreq() for all terms in this field, or -1 if this measure isn't stored by the codec (or if this fields omits term freq and positions). Note that, just like other term measures, this measure does not take deleted documents into account.

Specified by:

getSumTotalTermFreq in class Terms

getSumDocFreq

public long getSumDocFreq()

Description copied from class: Terms

Returns the sum of TermsEnum.docFreq() for all terms in 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:

getSumDocFreq in class Terms

getDocCount

public int getDocCount()

Description copied from class: Terms

Returns the number of documents that have at least one term 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:

getDocCount in class Terms

intersect

public TermsEnum intersect(CompiledAutomaton compiled,
                           BytesRef startTerm)
                    throws java.io.IOException

Description copied from class: Terms

Returns a TermsEnum that iterates over all terms that are accepted by the provided CompiledAutomaton. If the startTerm is provided then the returned enum will only accept terms > startTerm, but you still must call next() first to get to the first term. Note that the provided startTerm must be accepted by the automaton.

NOTE: the returned TermsEnum cannot seek

.

Overrides:

intersect in class Terms

Throws:

java.io.IOException

ramBytesUsed

public long ramBytesUsed()

Returns approximate RAM bytes used