/**
 *  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.hadoop.hive.ql.exec.spark;

import org.apache.hadoop.hive.ql.io.HiveKey;
import org.apache.hadoop.io.BytesWritable;
import org.apache.spark.api.java.JavaPairRDD;

public class ReduceTran<V> extends CacheTran<HiveKey, V, HiveKey, BytesWritable> {
  private HiveReduceFunction<V> reduceFunc;
  private String name = "Reduce";

  public ReduceTran() {
    this(false);
  }

  public ReduceTran(boolean caching) {
    super(caching);
  }

  @Override
  public JavaPairRDD<HiveKey, BytesWritable> doTransform(
      JavaPairRDD<HiveKey, V> input) {
    return input.mapPartitionsToPair(reduceFunc);
  }

  public void setReduceFunction(HiveReduceFunction<V> redFunc) {
    this.reduceFunc = redFunc;
  }

  @Override
  public String getName() {
    return name;
  }

  @Override
  public void setName(String name) {
    this.name = name;
  }
}