com.atlassian.jira.util.lucene
Class ConstantScorePrefixQuery

java.lang.Object
  org.apache.lucene.search.Query
      org.apache.lucene.search.MultiTermQuery
          org.apache.lucene.search.PrefixQuery
              com.atlassian.jira.util.lucene.ConstantScorePrefixQuery

All Implemented Interfaces:

Serializable, Cloneable

public class ConstantScorePrefixQuery
extends org.apache.lucene.search.PrefixQuery

PrefixQuery that doesn't rewrite into a BooleanQuery with all matching terms in the field. This query returns a constant score equal to its boost for all documents with the matching prefix term.

This can be significantly cheaper and faster if there are a lot of matching terms. It is very slightly slower if the number of matched terms is one or two.

Since:

4.0

See Also:

http://jira.atlassian.com/browse/JRA-17623, Serialized Form

Nested Class Summary

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

org.apache.lucene.search.MultiTermQuery.ConstantScoreAutoRewrite, org.apache.lucene.search.MultiTermQuery.RewriteMethod, org.apache.lucene.search.MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite, org.apache.lucene.search.MultiTermQuery.TopTermsScoringBooleanQueryRewrite

Field Summary

Fields inherited from class org.apache.lucene.search.MultiTermQuery

CONSTANT_SCORE_AUTO_REWRITE_DEFAULT, CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE, CONSTANT_SCORE_FILTER_REWRITE, rewriteMethod, SCORING_BOOLEAN_QUERY_REWRITE

Constructor Summary

ConstantScorePrefixQuery(org.apache.lucene.index.Term term)

Method Summary

org.apache.lucene.search.Query

rewrite(org.apache.lucene.index.IndexReader reader)

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

equals, getEnum, getPrefix, hashCode, toString

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

clearTotalNumberOfTerms, getRewriteMethod, getTotalNumberOfTerms, incTotalNumberOfTerms, setRewriteMethod

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

clone, combine, createWeight, extractTerms, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ConstantScorePrefixQuery

public ConstantScorePrefixQuery(org.apache.lucene.index.Term term)

Method Detail

rewrite

public org.apache.lucene.search.Query rewrite(org.apache.lucene.index.IndexReader reader)
                                       throws IOException

Overrides:

rewrite in class org.apache.lucene.search.MultiTermQuery

Throws:

IOException