org.sindice.siren.search.node

Class NodePhraseQuery

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.NodePhraseQuery

All Implemented Interfaces:

Cloneable

public class NodePhraseQuery
extends NodePrimitiveQuery

A NodePrimitiveQuery that matches nodes containing a particular sequence of terms. A NodePhraseQuery is built for input like "new york".

This query may be combined with other queries with a NodeBooleanQuery or a TwigQuery.

Code taken from PhraseQuery and adapted for the Siren use case.

Field Summary

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
NodePhraseQuery() Constructs an empty phrase query.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(org.apache.lucene.index.Term term) Adds a term to the end of the query phrase.
void	add(org.apache.lucene.index.Term term, int position) Adds a term to the end of the query phrase.
org.apache.lucene.search.Weight	createWeight(org.apache.lucene.search.IndexSearcher searcher)
boolean	equals(Object o)
void	extractTerms(Set<org.apache.lucene.index.Term> queryTerms)
int[]	getPositions() Returns the relative positions of terms in this phrase.
org.apache.lucene.index.Term[]	getTerms() Returns the set of terms in this phrase.
int	hashCode()
org.apache.lucene.search.Query	rewrite(org.apache.lucene.index.IndexReader reader)
String	toString(String f)

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, getBoost, setBoost, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NodePhraseQuery

public NodePhraseQuery()

Constructs an empty phrase query.

Method Detail

add

public void add(org.apache.lucene.index.Term term)

Adds a term to the end of the query phrase. The relative position of the term is the one immediately after the last term added.

add

public void add(org.apache.lucene.index.Term term,
       int position)

Adds a term to the end of the query phrase. The relative position of the term within the phrase is specified explicitly. This allows e.g. phrases with more than one term at the same position or phrases with gaps (e.g. in connection with stopwords).

Parameters:

term -

position -

getTerms

public org.apache.lucene.index.Term[] getTerms()

Returns the set of terms in this phrase.

getPositions

public int[] getPositions()

Returns the relative positions of terms in this phrase.

rewrite

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

Overrides:

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

Throws:

IOException

createWeight

public org.apache.lucene.search.Weight createWeight(org.apache.lucene.search.IndexSearcher searcher)
                                             throws IOException

Overrides:

createWeight in class org.apache.lucene.search.Query

Throws:

IOException

extractTerms

public void extractTerms(Set<org.apache.lucene.index.Term> queryTerms)

Overrides:

extractTerms in class org.apache.lucene.search.Query

See Also:

Query.extractTerms(java.util.Set)

toString

public String toString(String f)

Specified by:

toString in class org.apache.lucene.search.Query

equals

public boolean equals(Object o)

Overrides:

equals in class org.apache.lucene.search.Query

hashCode

public int hashCode()

Overrides:

hashCode in class org.apache.lucene.search.Query