eu.stratosphere.compiler.dag.InterestingPropertiesClearer Maven / Gradle / Ivy

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/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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 eu.stratosphere.compiler.dag;

import eu.stratosphere.util.Visitor;

final class InterestingPropertiesClearer implements Visitor {
	
	static final InterestingPropertiesClearer INSTANCE = new InterestingPropertiesClearer();

	@Override
	public boolean preVisit(OptimizerNode visitable) {
		if (visitable.getInterestingProperties() != null) {
			visitable.clearInterestingProperties();
			return true;
		} else {
			return false;
		}
	}

	@Override
	public void postVisit(OptimizerNode visitable) {}
}