| /* |
| * 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; |
| } |
| } |