demos/frauddetect/src/main/java/com/datatorrent/demos/frauddetect/SlidingWindowSumObject.java

/*
 * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed 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 com.datatorrent.demos.frauddetect;


import org.apache.commons.lang.mutable.MutableDouble;

import com.datatorrent.lib.multiwindow.SimpleMovingAverageObject;

/**
 * State object for sliding window sum
 *
 * @since 0.9.0
 */
public class SlidingWindowSumObject extends SimpleMovingAverageObject
{

  MutableDouble sum = new MutableDouble(0);

  public void add(Number n) {
    sum.add(n);
  }

  @Override
  public double getSum() {
    return sum.doubleValue();
  }

  @Override
  public void clear()
  {
    sum.setValue(0);
  }

}