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 backtype.storm.tuple.Values;
  import java.util.Map;
  import storm.trident.operation.Aggregator;
  import storm.trident.operation.ReducerAggregator;
  import storm.trident.operation.TridentCollector;
  import storm.trident.operation.TridentOperationContext;
  import storm.trident.tuple.TridentTuple;
  
  public class ReducerAggregatorImpl implements Aggregator<Result> {
      ReducerAggregator _agg;
  
      public ReducerAggregatorImpl(ReducerAggregator agg) {
          _agg = agg;
      }
  
      public void prepare(Map conf, TridentOperationContext context) {
  
      }
  
      public Result init(Object batchId, TridentCollector collector) {
          Result ret = new Result();
          ret.obj = _agg.init();
          return ret;
      }
  
      public void aggregate(Result val, TridentTuple tuple, TridentCollector collector) {
          val.obj = _agg.reduce(val.obj, tuple);
      }
  
      public void complete(Result val, TridentCollector collector) {
          collector.emit(new Values(val.obj));
      }
  
      public void cleanup() {
  
      }
  }
  