content: /**
   * 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 storm.trident.operation.impl;
  
  import java.util.Map;
  import storm.trident.operation.MultiReducer;
  import storm.trident.operation.TridentCollector;
  import storm.trident.operation.TridentMultiReducerContext;
  import storm.trident.tuple.TridentTuple;
  
  public class IdentityMultiReducer implements MultiReducer {
  
      @Override
      public void prepare(Map conf, TridentMultiReducerContext context) {
      }
  
      @Override
      public Object init(TridentCollector collector) {
          return null;
      }
  
      @Override
      public void execute(Object state, int streamIndex, TridentTuple input, TridentCollector collector) {
          collector.emit(input);
      }
  
      @Override
      public void complete(Object state, TridentCollector collector) {
      }
  
      @Override
      public void cleanup() {
      }
  
  }
  