/***********************************************************************************************************************
* 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.operators;
import java.util.Collections;
import java.util.List;
import eu.stratosphere.api.common.operators.util.FieldList;
import eu.stratosphere.compiler.dataproperties.LocalProperties;
import eu.stratosphere.compiler.dataproperties.RequestedLocalProperties;
import eu.stratosphere.compiler.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;
}
}