1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.giraph.reducers; 19 20 import org.apache.hadoop.io.Writable; 21 22 /** 23 * ReduceOperation object when single object being reduced is of 24 * same type as reduced value. 25 * 26 * @param <R> Reduced object type. 27 */ 28 public abstract class ReduceSameTypeOperation<R extends Writable> 29 implements ReduceOperation<R, R> { 30 @Override 31 public final R reduceMerge(R curValue, R valueToReduce) { 32 return reduce(curValue, valueToReduce); 33 } 34 }