/*
 * 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.wayang.flink.compiler;

import org.apache.flink.api.common.functions.CoGroupFunction;
import org.apache.flink.util.Collector;
import org.apache.wayang.basic.data.Tuple2;

/**
 * Wrapper of {@Link CoGroupFunction} of Flink for use in Wayang
 */
public class FlinkCoGroupFunction<InputType0, InputType1, OutputType> implements CoGroupFunction<InputType0, InputType1, OutputType> {


    @Override
    public void coGroup(Iterable<InputType0> iterable, Iterable<InputType1> iterable1, Collector<OutputType> collector) throws Exception {
        collector.collect((OutputType) new Tuple2<Iterable<InputType0>, Iterable<InputType1>>(iterable, iterable1));
    }
}
