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 backtype.storm.metric.api;
  
  @Deprecated
  class MeanReducerState {
      public int count = 0;
      public double sum = 0.0;
  }
  
  @Deprecated
  public class MeanReducer implements IReducer<MeanReducerState> {
      public MeanReducerState init() {
          return new MeanReducerState();
      }
  
      public MeanReducerState reduce(MeanReducerState acc, Object input) {
          acc.count++;
          if (input instanceof Double) {
              acc.sum += (Double) input;
          } else if (input instanceof Long) {
              acc.sum += ((Long) input).doubleValue();
          } else if (input instanceof Integer) {
              acc.sum += ((Integer) input).doubleValue();
          } else {
              throw new RuntimeException("MeanReducer::reduce called with unsupported input type `" + input.getClass()
                      + "`. Supported types are Double, Long, Integer.");
          }
          return acc;
      }
  
      public Object extractResult(MeanReducerState acc) {
          if (acc.count > 0) {
              return acc.sum / (double) acc.count;
          } else {
              return null;
          }
      }
  }
  