org.sindice.siren.search.node

Class NodeRegexpQuery

java.lang.Object

org.apache.lucene.search.Query

org.sindice.siren.search.node.NodeQuery

org.sindice.siren.search.node.NodePrimitiveQuery

org.sindice.siren.search.node.MultiNodeTermQuery

org.sindice.siren.search.node.NodeAutomatonQuery

org.sindice.siren.search.node.NodeRegexpQuery

All Implemented Interfaces:

Cloneable

public class NodeRegexpQuery
extends NodeAutomatonQuery

A NodePrimitiveQuery that provides a fast regular expression matching based on the org.apache.lucene.util.automaton package.

• Comparisons are fast
• The term dictionary is enumerated in an intelligent way, to avoid comparisons. See NodeAutomatonQuery for more details.

The supported syntax is documented in the RegExp class. Note this might be different than other regular expression implementations. For some alternatives with different syntax, look under the sandbox.

Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow RegexpQueries, a Regexp term should not start with the expression .*

Code taken from RegexpQuery and adapted for SIREn.

Nested Class Summary

Nested classes/interfaces inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

MultiNodeTermQuery.RewriteMethod

Field Summary

Fields inherited from class org.sindice.siren.search.node.NodeAutomatonQuery

automaton, compiled, term

Fields inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

CONSTANT_SCORE_AUTO_REWRITE_DEFAULT, CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE, CONSTANT_SCORE_FILTER_REWRITE, field, rewriteMethod, SCORING_BOOLEAN_QUERY_REWRITE

Fields inherited from class org.sindice.siren.search.node.NodePrimitiveQuery

datatype

Fields inherited from class org.sindice.siren.search.node.NodeQuery

ancestor, levelConstraint, lowerBound, upperBound

Constructor Summary

Constructors

Constructor and Description
NodeRegexpQuery(org.apache.lucene.index.Term term) Constructs a query for terms matching term.
NodeRegexpQuery(org.apache.lucene.index.Term term, int flags) Constructs a query for terms matching term.
NodeRegexpQuery(org.apache.lucene.index.Term term, int flags, org.apache.lucene.util.automaton.AutomatonProvider provider) Constructs a query for terms matching term.

Method Summary

Methods

Modifier and Type	Method and Description
String	toString(String field) Prints a user-readable version of this query.

Methods inherited from class org.sindice.siren.search.node.NodeAutomatonQuery

equals, getTermsEnum, hashCode

Methods inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

getField, getRewriteMethod, getTermsEnum, rewrite, setRewriteMethod

Methods inherited from class org.sindice.siren.search.node.NodePrimitiveQuery

setDatatype, wrapToStringWithDatatype

Methods inherited from class org.sindice.siren.search.node.NodeQuery

getDocsNodesAndPositionsEnum, getLevelConstraint, getNodeConstraint, setAncestorPointer, setLevelConstraint, setNodeConstraint, setNodeConstraint

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

clone, createWeight, extractTerms, getBoost, setBoost, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeRegexpQuery

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

Constructs a query for terms matching term.

By default, all regular expression features are enabled.

Parameters:

term - regular expression.

NodeRegexpQuery

public NodeRegexpQuery(org.apache.lucene.index.Term term,
               int flags)

Constructs a query for terms matching term.

Parameters:

term - regular expression.

flags - optional RegExp features from RegExp

NodeRegexpQuery

public NodeRegexpQuery(org.apache.lucene.index.Term term,
               int flags,
               org.apache.lucene.util.automaton.AutomatonProvider provider)

Constructs a query for terms matching term.

Parameters:

term - regular expression.

flags - optional RegExp features from RegExp

provider - custom AutomatonProvider for named automata

Method Detail

toString

public String toString(String field)

Prints a user-readable version of this query.

Overrides:

toString in class NodeAutomatonQuery