org.apache.lucene.codecs.blocktree

Class BitSetTermsEnum

java.lang.Object

org.apache.lucene.index.TermsEnum

org.apache.lucene.codecs.blocktree.BitSetTermsEnum

All Implemented Interfaces:

BytesRefIterator

class BitSetTermsEnum
extends TermsEnum

Silly stub class, used only when writing an auto-prefix term in order to expose DocsEnum over a FixedBitSet. We pass this to PostingsWriterBase.writeTerm(org.apache.lucene.util.BytesRef, org.apache.lucene.index.TermsEnum, org.apache.lucene.util.FixedBitSet) so that it can pull .docs() multiple times for the current term.

Nested Class Summary

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

TermsEnum.SeekStatus

Field Summary

Fields

Modifier and Type	Field and Description
private BitSetPostingsEnum	postingsEnum

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

EMPTY

Constructor Summary

Constructors

Constructor and Description
BitSetTermsEnum(BitSet docs)

Method Summary

Modifier and Type	Method and Description
int	docFreq() Returns the number of documents containing the current term.
BytesRef	next() Increments the iteration to the next BytesRef in the iterator.
long	ord() Returns ordinal position for current term.
PostingsEnum	postings(PostingsEnum reuse, int flags) Get PostingsEnum for the current term, with control over whether freqs, positions, offsets or payloads are required.
TermsEnum.SeekStatus	seekCeil(BytesRef text) Seeks to the specified term, if it exists, or to the next (ceiling) term.
void	seekExact(long ord) Seeks to the specified term by ordinal (position) as previously returned by TermsEnum.ord().
BytesRef	term() Returns current term.
long	totalTermFreq() Returns the total number of occurrences of this term across all documents (the sum of the freq() for each doc that has this term).

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

attributes, postings, seekExact, seekExact, termState

Methods inherited from class java.lang.Object

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

Field Detail

postingsEnum

private final BitSetPostingsEnum postingsEnum

Constructor Detail

BitSetTermsEnum

public BitSetTermsEnum(BitSet docs)

Method Detail

seekCeil

public TermsEnum.SeekStatus seekCeil(BytesRef text)

Description copied from class: TermsEnum

Seeks to the specified term, if it exists, or to the next (ceiling) term. Returns SeekStatus to indicate whether exact term was found, a different term was found, or EOF was hit. The target term may be before or after the current term. If this returns SeekStatus.END, the enum is unpositioned.

Specified by:

seekCeil in class TermsEnum

seekExact

public void seekExact(long ord)

Description copied from class: TermsEnum

Seeks to the specified term by ordinal (position) as previously returned by TermsEnum.ord(). The target ord may be before or after the current ord, and must be within bounds.

Specified by:

seekExact in class TermsEnum

term

public BytesRef term()

Description copied from class: TermsEnum

Returns current term. Do not call this when the enum is unpositioned.

Specified by:

term in class TermsEnum

next

public BytesRef next()

Description copied from interface: BytesRefIterator

Increments the iteration to the next BytesRef in the iterator. Returns the resulting BytesRef or null if the end of the iterator is reached. The returned BytesRef may be re-used across calls to next. After this method returns null, do not call it again: the results are undefined.

Returns:

the next BytesRef in the iterator or null if the end of the iterator is reached.

ord

public long ord()

Description copied from class: TermsEnum

Returns ordinal position for current term. This is an optional method (the codec may throw UnsupportedOperationException). Do not call this when the enum is unpositioned.

Specified by:

ord in class TermsEnum

docFreq

public int docFreq()

Description copied from class: TermsEnum

Returns the number of documents containing the current term. Do not call this when the enum is unpositioned. TermsEnum.SeekStatus.END.

Specified by:

docFreq in class TermsEnum

totalTermFreq

public long totalTermFreq()

Description copied from class: TermsEnum

Returns the total number of occurrences of this term across all documents (the sum of the freq() for each doc that has this term). This will be -1 if the codec doesn't support this measure. Note that, like other term measures, this measure does not take deleted documents into account.

Specified by:

totalTermFreq in class TermsEnum

postings

public PostingsEnum postings(PostingsEnum reuse,
                             int flags)

Description copied from class: TermsEnum

Get PostingsEnum for the current term, with control over whether freqs, positions, offsets or payloads are required. Do not call this when the enum is unpositioned. This method may return null if the postings information required is not available from the index

NOTE: the returned iterator may return deleted documents, so deleted documents have to be checked on top of the PostingsEnum.

Specified by:

postings in class TermsEnum

Parameters:

reuse - pass a prior PostingsEnum for possible reuse

flags - specifies which optional per-document values you require; see PostingsEnum.FREQS