Package org.apache.lucene.search
Class PrefixQuery
java.lang.Object
org.apache.lucene.search.Query
org.apache.lucene.search.MultiTermQuery
org.apache.lucene.search.AutomatonQuery
org.apache.lucene.search.PrefixQuery
- All Implemented Interfaces:
Accountable
A Query that matches documents containing terms with a specified prefix. A PrefixQuery is built
by QueryParser for input like
app*.
This query uses the MultiTermQuery.CONSTANT_SCORE_BLENDED_REWRITE rewrite method.
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.search.MultiTermQuery
MultiTermQuery.RewriteMethod, MultiTermQuery.TopTermsBlendedFreqScoringRewrite, MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite, MultiTermQuery.TopTermsScoringBooleanQueryRewrite -
Field Summary
Fields inherited from class org.apache.lucene.search.AutomatonQuery
automaton, automatonIsBinary, compiled, termFields inherited from class org.apache.lucene.search.MultiTermQuery
CONSTANT_SCORE_BLENDED_REWRITE, CONSTANT_SCORE_BOOLEAN_REWRITE, CONSTANT_SCORE_REWRITE, DOC_VALUES_REWRITE, field, rewriteMethod, SCORING_BOOLEAN_REWRITEFields inherited from interface org.apache.lucene.util.Accountable
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Constructor Summary
ConstructorsConstructorDescriptionPrefixQuery(Term prefix) Constructs a query for terms starting withprefix.PrefixQuery(Term prefix, MultiTermQuery.RewriteMethod rewriteMethod) Constructs a query for terms starting withprefixusing a defined RewriteMethod -
Method Summary
Modifier and TypeMethodDescriptionbooleanOverride and implement query instance equivalence properly in a subclass.Returns the prefix of this query.inthashCode()Override and implement query hash code properly in a subclass.static AutomatontoAutomaton(BytesRef prefix) Build an automaton accepting all terms with the specified prefix.Prints a user-readable version of this query.Methods inherited from class org.apache.lucene.search.AutomatonQuery
getAutomaton, getCompiled, getTermsEnum, isAutomatonBinary, ramBytesUsed, visitMethods inherited from class org.apache.lucene.search.MultiTermQuery
getField, getRewriteMethod, getTermsCount, getTermsEnum, rewriteMethods inherited from class org.apache.lucene.search.Query
classHash, createWeight, sameClassAs, toStringMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface org.apache.lucene.util.Accountable
getChildResources
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Constructor Details
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PrefixQuery
Constructs a query for terms starting withprefix. -
PrefixQuery
Constructs a query for terms starting withprefixusing a defined RewriteMethod
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Method Details
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toAutomaton
Build an automaton accepting all terms with the specified prefix. -
getPrefix
Returns the prefix of this query. -
toString
Prints a user-readable version of this query.- Overrides:
toStringin classAutomatonQuery
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hashCode
public int hashCode()Description copied from class:QueryOverride and implement query hash code properly in a subclass. This is required so thatQueryCacheworks properly.- Overrides:
hashCodein classAutomatonQuery- See Also:
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equals
Description copied from class:QueryOverride and implement query instance equivalence properly in a subclass. This is required so thatQueryCacheworks properly.Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical to those of the other instance. Utility methods are provided for certain repetitive code.
- Overrides:
equalsin classAutomatonQuery- See Also:
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