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.r.oldfaithful;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.apex.malhar.contrib.r.RScript;
  
  import com.datatorrent.api.Context;
  import com.datatorrent.api.DefaultInputPort;
  import com.datatorrent.api.annotation.InputPortFieldAnnotation;
  
  /**
   * @since 2.1.0
   */
  public class FaithfulRScript extends RScript
  {
  
    private transient List<FaithfulKey> readingsList = new ArrayList<FaithfulKey>();
    private int elapsedTime;
    private static final Logger LOG = LoggerFactory.getLogger(FaithfulRScript.class);
  
    public FaithfulRScript()
    {
      super();
    }
  
    public FaithfulRScript(String rScriptFilePath, String rFunction, String returnVariable)
    {
      super(rScriptFilePath, rFunction, returnVariable);
    }
  
    @InputPortFieldAnnotation(optional = true)
    public final transient DefaultInputPort<FaithfulKey> faithfulInput = new DefaultInputPort<FaithfulKey>()
    {
      @Override
      public void process(FaithfulKey tuple)
      {
        // Create a map of ("String", values) to be passed to the process
        // function in the RScipt operator's process()
        readingsList.add(tuple);
  
      }
  
    };
  
    @InputPortFieldAnnotation(optional = true)
    public final transient DefaultInputPort<Integer> inputElapsedTime = new DefaultInputPort<Integer>()
    {
      @Override
      public void process(Integer eT)
      {
        elapsedTime = eT;
      }
    };
  
    @Override
    public void setup(Context.OperatorContext context)
    {
      super.setup(context);
    }
  
    @Override
    public void endWindow()
    {
      if (readingsList.size() == 0) {
        return;
      }
      LOG.info("Input data size: readingsList - " + readingsList.size());
  
      double[] eruptionDuration = new double[readingsList.size()];
      int[] waitingTime = new int[readingsList.size()];
  
      for (int i = 0; i < readingsList.size(); i++) {
        eruptionDuration[i] = readingsList.get(i).getEruptionDuration();
        waitingTime[i] = readingsList.get(i).getWaitingTime();
      }
      LOG.info("Input data size: eruptionDuration - " + eruptionDuration.length);
      LOG.info("Input data size: waitingTime - " + waitingTime.length);
  
      HashMap<String, Object> map = new HashMap<String, Object>();
  
      map.put("ELAPSEDTIME", elapsedTime);
      map.put("ERUPTIONS", eruptionDuration);
      map.put("WAITING", waitingTime);
  
      super.process(map);
      readingsList.clear();
      map.clear();
    }
  }
  