org.apache.lucene.search

Class TopTermsRewrite<B>

java.lang.Object

org.apache.lucene.search.MultiTermQuery.RewriteMethod

org.apache.lucene.search.TermCollectingRewrite<B>

org.apache.lucene.search.TopTermsRewrite<B>

Direct Known Subclasses:

MultiTermQuery.TopTermsBlendedFreqScoringRewrite, MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite, MultiTermQuery.TopTermsScoringBooleanQueryRewrite

public abstract class TopTermsRewrite<B>
extends TermCollectingRewrite<B>

Base rewrite method for collecting only the top terms via a priority queue.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	TopTermsRewrite.ScoreTerm

Nested classes/interfaces inherited from class org.apache.lucene.search.TermCollectingRewrite

TermCollectingRewrite.TermCollector

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.Comparator<TopTermsRewrite.ScoreTerm>	scoreTermSortByTermComp
private int	size

Constructor Summary

Constructors

Constructor and Description
TopTermsRewrite(int size) Create a TopTermsBooleanQueryRewrite for at most size terms.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
protected abstract int	getMaxSize() return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).
int	getSize() return the maximum priority queue size
int	hashCode()
Query	rewrite(IndexReader reader, MultiTermQuery query)

Methods inherited from class org.apache.lucene.search.TermCollectingRewrite

addClause, addClause, build, collectTerms, getTopLevelBuilder

Methods inherited from class org.apache.lucene.search.MultiTermQuery.RewriteMethod

getTermsEnum

Methods inherited from class java.lang.Object

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

Field Detail

size

private final int size

scoreTermSortByTermComp

private static final java.util.Comparator<TopTermsRewrite.ScoreTerm> scoreTermSortByTermComp

Constructor Detail

TopTermsRewrite

public TopTermsRewrite(int size)

Create a TopTermsBooleanQueryRewrite for at most size terms.

NOTE: if BooleanQuery.getMaxClauseCount() is smaller than size, then it will be used instead.

Method Detail

getSize

public int getSize()

return the maximum priority queue size

getMaxSize

protected abstract int getMaxSize()

return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).

rewrite

public final Query rewrite(IndexReader reader,
                           MultiTermQuery query)
                    throws java.io.IOException

Specified by:

rewrite in class MultiTermQuery.RewriteMethod

Throws:

java.io.IOException

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object