org.apache.lucene.search.regex

Class RegexQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.MultiTermQuery

org.apache.lucene.search.regex.RegexQuery

All Implemented Interfaces:

Serializable, Cloneable, RegexQueryCapable

public class RegexQuery
extends MultiTermQuery
implements RegexQueryCapable

Implements the regular expression term search query. The expressions supported depend on the regular expression implementation used by way of the RegexCapabilities interface.

See Also:

RegexTermEnum, Serialized Form

Nested Class Summary

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

MultiTermQuery.ConstantScoreAutoRewrite, MultiTermQuery.RewriteMethod, MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite, 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

Constructors

Constructor and Description
RegexQuery(Term term) Constructs a query for terms matching term.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
protected FilteredTermEnum	getEnum(IndexReader reader) Construct the enumeration to be used, expanding the pattern term.
RegexCapabilities	getRegexImplementation()
Term	getTerm()
int	hashCode()
void	setRegexImplementation(RegexCapabilities impl) Defines which RegexCapabilities implementation is used by this instance.
String	toString(String field) Prints a query to a string, with field assumed to be the default field and omitted.

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

clearTotalNumberOfTerms, getRewriteMethod, getTotalNumberOfTerms, incTotalNumberOfTerms, rewrite, 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

RegexQuery

public RegexQuery(Term term)

Constructs a query for terms matching term.

Method Detail

getTerm

public Term getTerm()

setRegexImplementation

public void setRegexImplementation(RegexCapabilities impl)

Defines which RegexCapabilities implementation is used by this instance.

Specified by:

setRegexImplementation in interface RegexQueryCapable

Parameters:

impl -

getRegexImplementation

public RegexCapabilities getRegexImplementation()

Specified by:

getRegexImplementation in interface RegexQueryCapable

Returns:

The implementation used by this instance.

getEnum

protected FilteredTermEnum getEnum(IndexReader reader)
                            throws IOException

Description copied from class: MultiTermQuery

Construct the enumeration to be used, expanding the pattern term.

Specified by:

getEnum in class MultiTermQuery

Throws:

IOException

toString

public String toString(String field)

Description copied from class: Query

Prints a query to a string, with field assumed to be the default field and omitted.

The representation used is one that is supposed to be readable by QueryParser. However, there are the following limitations:

• If the query was created by the parser, the printed representation may not be exactly what was parsed. For example, characters that need to be escaped will be represented without the required backslash.
• Some of the more complicated queries (e.g. span queries) don't have a representation that can be parsed by QueryParser.

Specified by:

toString in class Query

equals

public boolean equals(Object o)

Overrides:

equals in class MultiTermQuery

hashCode

public int hashCode()

Overrides:

hashCode in class MultiTermQuery