| // 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. |
| |
| using System.Collections.Generic; |
| using Org.Apache.REEF.Network.Group.Operators; |
| using Org.Apache.REEF.Tang.Annotations; |
| |
| namespace Org.Apache.REEF.IMRU.Examples.PipelinedBroadcastReduce |
| { |
| /// <summary> |
| /// A reduce function that sums integer arrays. |
| /// </summary> |
| internal sealed class IntArraySumReduceFunction : IReduceFunction<int[]> |
| { |
| [Inject] |
| private IntArraySumReduceFunction() |
| { |
| } |
| |
| /// <summary> |
| /// Reduce function that returns the sum of elements of int array |
| /// </summary> |
| /// <param name="elements">List of elements</param> |
| /// <returns>The sum of elements</returns> |
| int[] IReduceFunction<int[]>.Reduce(IEnumerable<int[]> elements) |
| { |
| int counter = 0; |
| int[] resArr = null; |
| |
| foreach (var element in elements) |
| { |
| if (counter == 0) |
| { |
| counter++; |
| resArr = new int[element.Length]; |
| } |
| |
| for (int i = 0; i < resArr.Length; i++) |
| { |
| resArr[i] += element[i]; |
| } |
| } |
| |
| return resArr; |
| } |
| } |
| } |