| /** |
| * 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.storm.streams.operations; |
| |
| /** |
| * The {@link Reducer} performs an operation on two values of the same type producing a result of the same type. |
| * |
| * @param <T> the type of the arguments and the result |
| */ |
| public interface Reducer<T> extends BiFunction<T, T, T> { |
| /** |
| * Applies this function to the given arguments. |
| * |
| * @param arg1 the first argument |
| * @param arg2 the second argument |
| * @return the result |
| */ |
| @Override |
| T apply(T arg1, T arg2); |
| } |