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.frauddetect;
  
  import java.util.ArrayList;
  
  import org.apache.apex.malhar.lib.multiwindow.AbstractSlidingWindowKeyVal;
  import org.apache.apex.malhar.lib.util.KeyValPair;
  
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
  
  
  /**
   * Sliding window sum operator
   *
   * @since 0.9.0
   */
  public class SlidingWindowSumKeyVal<K, V extends Number> extends AbstractSlidingWindowKeyVal<K, V, SlidingWindowSumObject>
  {
  
    /**
     * Output port to emit simple moving average (SMA) of last N window as Double.
     */
    @OutputPortFieldAnnotation(optional = true)
    public final transient DefaultOutputPort<KeyValPair<K, Double>> doubleSum = new DefaultOutputPort<KeyValPair<K, Double>>();
    /**
     * Output port to emit simple moving average (SMA) of last N window as Float.
     */
    @OutputPortFieldAnnotation(optional = true)
    public final transient DefaultOutputPort<KeyValPair<K, Float>> floatSum = new DefaultOutputPort<KeyValPair<K, Float>>();
    /**
     * Output port to emit simple moving average (SMA) of last N window as Long.
     */
    @OutputPortFieldAnnotation(optional = true)
    public final transient DefaultOutputPort<KeyValPair<K, Long>> longSum = new DefaultOutputPort<KeyValPair<K, Long>>();
    /**
     * Output port to emit simple moving average (SMA) of last N window as
     * Integer.
     */
    @OutputPortFieldAnnotation(optional = true)
    public final transient DefaultOutputPort<KeyValPair<K, Integer>> integerSum = new DefaultOutputPort<KeyValPair<K, Integer>>();
  
  
    @Override
    public void processDataTuple(KeyValPair<K, V> tuple)
    {
      K key = tuple.getKey();
      ArrayList<SlidingWindowSumObject> stateList = buffer.get(key);
      if (stateList == null) {
        stateList = new ArrayList<SlidingWindowSumObject>();
        for (int i = 0; i < windowSize; ++i) {
          stateList.add(new SlidingWindowSumObject());
        }
        buffer.put(key, stateList);
      }
      SlidingWindowSumObject state = stateList.get(currentstate);
      state.add(tuple.getValue());
    }
  
    @Override
    public void emitTuple(K key, ArrayList<SlidingWindowSumObject> obj)
    {
      double sum = 0;
      for (int i = 0; i < obj.size(); ++i) {
        SlidingWindowSumObject state = obj.get(i);
        sum += state.getSum();
      }
      if (doubleSum.isConnected()) {
        doubleSum.emit(new KeyValPair<K, Double>(key, sum));
      }
      if (floatSum.isConnected()) {
        floatSum.emit(new KeyValPair<K, Float>(key, (float)sum));
      }
      if (longSum.isConnected()) {
        longSum.emit(new KeyValPair<K, Long>(key, (long)sum));
      }
      if (integerSum.isConnected()) {
        integerSum.emit(new KeyValPair<K, Integer>(key, (int)sum));
      }
    }
  
  }
  