no.sesat.search.query.finder
Class PredicateFinder

java.lang.Object
  no.sesat.commons.visitor.AbstractReflectionVisitor
      no.sesat.search.query.finder.PredicateFinder

All Implemented Interfaces:

no.sesat.commons.visitor.Visitor

public final class PredicateFinder
extends no.sesat.commons.visitor.AbstractReflectionVisitor

Responsible for Visiting the Query and finding where the predicate lies. This class is thread-safe. TODO Handle predicates under NOT and ANDNOT clauses. Currently they are ignored.

Version:

$Id: PredicateFinder.java 7225 2009-04-09 00:32:20Z ssmiweve $

Field Summary

Fields inherited from class no.sesat.commons.visitor.AbstractReflectionVisitor

VISIT_METHOD_IMPL

Constructor Summary

PredicateFinder()

Method Summary

Set<Clause>	findClauses(Clause root, org.apache.commons.collections.Predicate predicate, TokenEvaluationEngine engine) find all the clauses containing the predicate.
Clause	findFirstClause(Clause root, org.apache.commons.collections.Predicate predicate, TokenEvaluationEngine engine) find the first clause containing the predicate.
protected void	visitImpl(AndNotClause clause) TODO comment me.
protected void	visitImpl(BinaryClause clause) TODO comment me.
protected void	visitImpl(Clause clause) TODO comment me.
protected void	visitImpl(NotClause clause) TODO comment me.
protected void	visitImpl(XorClause clause) TODO comment me.

Methods inherited from class no.sesat.commons.visitor.AbstractReflectionVisitor

visit, visitImpl

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PredicateFinder

public PredicateFinder()

Method Detail

findFirstClause

public Clause findFirstClause(Clause root,
                              org.apache.commons.collections.Predicate predicate,
                              TokenEvaluationEngine engine)

find the first clause containing the predicate.

Parameters:

root -

predicate -

engine -

Returns:

findClauses

public Set<Clause> findClauses(Clause root,
                               org.apache.commons.collections.Predicate predicate,
                               TokenEvaluationEngine engine)

find all the clauses containing the predicate. returns largest multi-terms clauses and before leaf clauses.

Parameters:

root -

predicate -

engine -

Returns:

visitImpl

protected void visitImpl(BinaryClause clause)

TODO comment me. *

Parameters:

clause -

visitImpl

protected void visitImpl(XorClause clause)

TODO comment me. *

Parameters:

clause -

visitImpl

protected void visitImpl(NotClause clause)

TODO comment me. *

Parameters:

clause -

visitImpl

protected void visitImpl(AndNotClause clause)

TODO comment me. *

Parameters:

clause -

visitImpl

protected void visitImpl(Clause clause)

TODO comment me. *

Parameters:

clause -