org.apache.lucene.search.regex

Class SpanRegexQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.spans.SpanQuery

org.apache.lucene.search.regex.SpanRegexQuery

All Implemented Interfaces:

Serializable, Cloneable, RegexQueryCapable

public class SpanRegexQuery
extends SpanQuery
implements RegexQueryCapable

A SpanQuery version of RegexQuery allowing regular expression queries to be nested within other SpanQuery subclasses.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SpanRegexQuery(Term term)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getField() Returns the name of the field matched by this query.
PayloadSpans	getPayloadSpans(IndexReader reader) Returns the matches for this query in an index, including access to any Payloads at those positions.
RegexCapabilities	getRegexImplementation()
Spans	getSpans(IndexReader reader) Expert: Returns the matches for this query in an index.
Term	getTerm()
Collection	getTerms() Returns a collection of all terms matched by this query.
int	hashCode()
Query	rewrite(IndexReader reader) Expert: called to re-write queries into primitive queries.
void	setRegexImplementation(RegexCapabilities impl)
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.spans.SpanQuery

createWeight

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SpanRegexQuery

public SpanRegexQuery(Term term)

Method Detail

getTerm

public Term getTerm()

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Description copied from class: Query

Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Overrides:

rewrite in class Query

Throws:

IOException

getSpans

public Spans getSpans(IndexReader reader)
               throws IOException

Description copied from class: SpanQuery

Expert: Returns the matches for this query in an index. Used internally to search for spans.

Specified by:

getSpans in class SpanQuery

Throws:

IOException

getPayloadSpans

public PayloadSpans getPayloadSpans(IndexReader reader)
                             throws IOException

Description copied from class: SpanQuery

Returns the matches for this query in an index, including access to any Payloads at those positions. Implementing classes that want access to the payloads will need to implement this.

Overrides:

getPayloadSpans in class SpanQuery

Parameters:

reader - The IndexReader to use to get spans/payloads

Returns:

null

Throws:

IOException - if there is an error accessing the payload WARNING: The status of the Payloads feature is experimental. The APIs introduced here might change in the future and will not be supported anymore in such a case.

getField

public String getField()

Description copied from class: SpanQuery

Returns the name of the field matched by this query.

Specified by:

getField in class SpanQuery

getTerms

public Collection getTerms()

Description copied from class: SpanQuery

Returns a collection of all terms matched by this query.

Specified by:

getTerms in class SpanQuery

See Also:

Query.extractTerms(Set)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

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

setRegexImplementation

public void setRegexImplementation(RegexCapabilities impl)

Specified by:

setRegexImplementation in interface RegexQueryCapable

getRegexImplementation

public RegexCapabilities getRegexImplementation()

Specified by:

getRegexImplementation in interface RegexQueryCapable