org.sindice.siren.search.node

Class NodePrefixQuery

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.NodePrefixQuery

All Implemented Interfaces:

Cloneable

public class NodePrefixQuery
extends MultiNodeTermQuery

A NodePrimitiveQuery that matches documents containing terms with a specified prefix. A PrefixQuery is built by QueryParser for input like app*.

This query uses the MultiNodeTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT rewrite method.

Code taken from PrefixQuery 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.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
NodePrefixQuery(org.apache.lucene.index.Term prefix) Constructs a query for terms starting with prefix.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
org.apache.lucene.index.Term	getPrefix() Returns the prefix of this query.
protected org.apache.lucene.index.TermsEnum	getTermsEnum(org.apache.lucene.index.Terms terms, org.apache.lucene.util.AttributeSource atts) Construct the enumeration to be used, expanding the pattern term.
int	hashCode()
String	toString(String field) Prints a user-readable version of this query.

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

NodePrefixQuery

public NodePrefixQuery(org.apache.lucene.index.Term prefix)

Constructs a query for terms starting with prefix.

Method Detail

getPrefix

public org.apache.lucene.index.Term getPrefix()

Returns the prefix of this query.

getTermsEnum

protected org.apache.lucene.index.TermsEnum getTermsEnum(org.apache.lucene.index.Terms terms,
                                             org.apache.lucene.util.AttributeSource atts)
                                                  throws IOException

Description copied from class: MultiNodeTermQuery

Construct the enumeration to be used, expanding the pattern term. This method should only be called if the field exists (ie, implementations can assume the field does exist). This method should not return null (should instead return TermsEnum.EMPTY if no terms match). The TermsEnum must already be positioned to the first matching term. The given AttributeSource is passed by the MultiNodeTermQuery.RewriteMethod to provide attributes, the rewrite method uses to inform about e.g. maximum competitive boosts. This is currently only used by TopNodeTermsRewrite

Specified by:

getTermsEnum in class MultiNodeTermQuery

Throws:

IOException

toString

public String toString(String field)

Prints a user-readable version of this query.

Specified by:

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

hashCode

public int hashCode()

Overrides:

hashCode in class MultiNodeTermQuery

equals

public boolean equals(Object obj)

Overrides:

equals in class MultiNodeTermQuery