com.hazelcast.query.impl.predicates

Class FlatteningVisitor

java.lang.Object

com.hazelcast.query.impl.predicates.AbstractVisitor

com.hazelcast.query.impl.predicates.FlatteningVisitor

All Implemented Interfaces:

Visitor

public class FlatteningVisitor
extends AbstractVisitor

Rewrites predicates: 1. AndPredicates flattening: (a = 1 and (b = 2 and c = 3)) into (a = 1 and b = 2 and c = 3) 2. OrPredicate flattening: (a = 1 or (b = 2 or c = 3)) into (a = 1 or b = 2 or c = 3) 3. NotElimination (not(P)) when P is NegatablePredicate is rewritten as P.negate()

Constructor Summary

Constructors

Constructor and Description
FlatteningVisitor()

Method Summary

Modifier and Type	Method and Description
Predicate	visit(AndPredicate andPredicate, Indexes indexes)
Predicate	visit(NotPredicate predicate, Indexes indexes)
Predicate	visit(OrPredicate orPredicate, Indexes indexes)

Methods inherited from class java.lang.Object

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

Constructor Detail

FlatteningVisitor

public FlatteningVisitor()

Method Detail

visit

public Predicate visit(AndPredicate andPredicate,
                       Indexes indexes)

Specified by:

visit in interface Visitor

Overrides:

visit in class AbstractVisitor

visit

public Predicate visit(OrPredicate orPredicate,
                       Indexes indexes)

Specified by:

visit in interface Visitor

Overrides:

visit in class AbstractVisitor

visit

public Predicate visit(NotPredicate predicate,
                       Indexes indexes)

Specified by:

visit in interface Visitor

Overrides:

visit in class AbstractVisitor