/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.optimizer.plan;

import org.apache.flink.optimizer.dag.BinaryUnionNode;
import org.apache.flink.runtime.operators.DriverStrategy;

/**
 * A special subclass for the union to make it identifiable.
 */
public class BinaryUnionPlanNode extends DualInputPlanNode {
	
	/**
	 * @param template
	 */
	public BinaryUnionPlanNode(BinaryUnionNode template, Channel in1, Channel in2) {
		super(template, "Union", in1, in2, DriverStrategy.UNION);
	}
	
	public BinaryUnionPlanNode(BinaryUnionPlanNode toSwapFrom) {
		super(toSwapFrom.getOptimizerNode(), "Union-With-Cached", toSwapFrom.getInput2(), toSwapFrom.getInput1(),
				DriverStrategy.UNION_WITH_CACHED);
		
		this.globalProps = toSwapFrom.globalProps;
		this.localProps = toSwapFrom.localProps;
		this.nodeCosts = toSwapFrom.nodeCosts;
		this.cumulativeCosts = toSwapFrom.cumulativeCosts;
		
		setParallelism(toSwapFrom.getParallelism());
	}
	
	public BinaryUnionNode getOptimizerNode() {
		return (BinaryUnionNode) this.template;
	}
	
	public boolean unionsStaticAndDynamicPath() {
		return getInput1().isOnDynamicPath() != getInput2().isOnDynamicPath();
	}
	
	@Override
	public int getMemoryConsumerWeight() {
		return 0;
	}
}