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 org.apache.apex.examples.twitter;
  
  import java.io.Serializable;
  
  /**
   * Developed for a example<br>
   *
   * @param <T> Type of object for which sliding window is being maintained.
   * @since 0.3.2
   */
  public class SlidingContainer<T> implements Serializable
  {
    private static final long serialVersionUID = 201305291751L;
    T identifier;
    int totalCount;
    int position;
    int[] windowedCount;
  
    @SuppressWarnings("unused")
    private SlidingContainer()
    {
      /* needed for Kryo serialization */
    }
  
    public SlidingContainer(T identifier, int windowCount)
    {
      this.identifier = identifier;
      this.totalCount = 0;
      this.position = 0;
      windowedCount = new int[windowCount];
    }
  
    public void adjustCount(int i)
    {
      windowedCount[position] += i;
    }
  
    public void slide()
    {
      int currentCount = windowedCount[position];
      position = position == windowedCount.length - 1 ? 0 : position + 1;
      totalCount += currentCount - windowedCount[position];
      windowedCount[position] = 0;
    }
  
    @Override
    public String toString()
    {
      return identifier + " => " + totalCount;
    }
  
  }
  