flink-optimizer/src/main/java/org/apache/flink/optimizer/operators/CoGroupWithSolutionSetSecondDescriptor.java

/*
 * 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 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;

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

/** */
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;
    }
}