org.apache.lucene.index

Class FilterAtomicReader.FilterTerms

java.lang.Object

org.apache.lucene.index.Terms

org.apache.lucene.index.FilterAtomicReader.FilterTerms

Enclosing class:

FilterAtomicReader

public static class FilterAtomicReader.FilterTerms
extends Terms

Base class for filtering Terms implementations.

Field Summary

Fields

Modifier and Type	Field and Description
protected Terms	in

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

EMPTY_ARRAY

Constructor Summary

Constructors

Constructor and Description
FilterAtomicReader.FilterTerms(Terms in)

Method Summary

Methods

Modifier and Type	Method and Description
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).
TermsEnum	intersect(CompiledAutomaton automaton, BytesRef bytes) 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	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

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

Field Detail

in

protected final Terms in

Constructor Detail

FilterAtomicReader.FilterTerms

public FilterAtomicReader.FilterTerms(Terms in)

Method Detail

iterator

public TermsEnum iterator(TermsEnum reuse)
                   throws 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:

IOException

getComparator

public Comparator<BytesRef> getComparator()
                                   throws IOException

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

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, 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

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, 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

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, 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

Throws:

IOException

intersect

public TermsEnum intersect(CompiledAutomaton automaton,
                  BytesRef bytes)
                    throws 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:

IOException