com.hazelcast.query.VisitablePredicate Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.query;
import com.hazelcast.query.impl.Indexes;
import com.hazelcast.query.impl.predicates.Visitor;
/**
* Predicates which can be visited by optimizer.
*
*/
public interface VisitablePredicate {
/**
* Accept visitor. Predicate can either return it's own instance if no modification
* was done as a result of the visit. In the case there is a change needed then
* the predicate has to return changed copy of itself. Predicates has to be treated
* as immutable for optimization purposes.
*
* @param visitor visitor to accept
* @param indexes indexes
* @return itself or its changed copy
*/
Predicate accept(Visitor visitor, Indexes indexes);
}