fullstack/algebricks/algebricks-compiler/src/main/java/edu/uci/ics/hyracks/algebricks/compiler/rewriter/rulecontrollers/SequentialOnceRuleController.java

/*
 * Copyright 2009-2010 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.algebricks.compiler.rewriter.rulecontrollers;

import java.util.Collection;

import org.apache.commons.lang3.mutable.Mutable;

import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
import edu.uci.ics.hyracks.algebricks.core.rewriter.base.AbstractRuleController;
import edu.uci.ics.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule;

public class SequentialOnceRuleController extends AbstractRuleController {

    private final boolean enterNestedPlans;

    public SequentialOnceRuleController(boolean enterNestedPlans) {
        super();
        this.enterNestedPlans = enterNestedPlans;
    }

    @Override
    public boolean rewriteWithRuleCollection(Mutable<ILogicalOperator> root, Collection<IAlgebraicRewriteRule> rules)
            throws AlgebricksException {
        boolean fired = false;
        for (IAlgebraicRewriteRule rule : rules) {
            if (rewriteOperatorRef(root, rule, enterNestedPlans, true)) {
                fired = true;
            }
        }
        return fired;
    }
}