/*
 * 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.operators;

import java.util.Collections;
import java.util.List;

import org.apache.flink.api.common.operators.util.FieldList;
import org.apache.flink.optimizer.dataproperties.LocalProperties;
import org.apache.flink.optimizer.dataproperties.RequestedLocalProperties;
import org.apache.flink.optimizer.util.Utils;

/**
 * 
 */
public class CoGroupWithSolutionSetSecondDescriptor extends CoGroupDescriptor {
	
	public CoGroupWithSolutionSetSecondDescriptor(FieldList keys1, FieldList keys2) {
		super(keys1, keys2);
	}
	
	@Override
	protected List<LocalPropertiesPair> createPossibleLocalProperties() {
		RequestedLocalProperties sort = new RequestedLocalProperties(Utils.createOrdering(this.keys1));
		RequestedLocalProperties none = new RequestedLocalProperties();
		return Collections.singletonList(new LocalPropertiesPair(sort, none));
	}
	
	@Override
	public boolean areCoFulfilled(RequestedLocalProperties requested1, RequestedLocalProperties requested2,
			LocalProperties produced1, LocalProperties produced2)
	{
		return true;
	}

	@Override
	public LocalProperties computeLocalProperties(LocalProperties in1, LocalProperties in2) {
		return in1;
	}
}