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.mobile;
  
  import java.util.Map;
  import java.util.Random;
  import javax.validation.constraints.Min;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.common.collect.Maps;
  import com.google.common.collect.Range;
  
  import com.datatorrent.api.DefaultInputPort;
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.api.annotation.InputPortFieldAnnotation;
  import com.datatorrent.common.util.BaseOperator;
  
  /**
   * Generates mobile numbers that will be displayed in mobile example just after launch.<br></br>
   * Operator attributes:<b>
   * <ul>
   *   <li>initialDisplayCount: No. of seed phone numbers that will be generated.</li>
   *   <li>maxSeedPhoneNumber: The largest seed phone number.</li>
   * </ul>
   * </b>
   *
   * @since 0.3.5
   */
  public class PhoneEntryOperator extends BaseOperator
  {
    private static Logger LOG = LoggerFactory.getLogger(PhoneEntryOperator.class);
  
    private boolean seedGenerationDone = false;
  
    @Min(0)
    private int initialDisplayCount = 0;
  
    private int maxSeedPhoneNumber = 0;
    private int rangeLowerEndpoint;
    private int rangeUpperEndpoint;
  
    /**
     * Sets the initial number of phones to display on the google map.
     *
     * @param i the count of initial phone numbers to display
     */
    public void setInitialDisplayCount(int i)
    {
      initialDisplayCount = i;
    }
  
    /**
     * Sets the range for the phone numbers generated by the operator.
     *
     * @param i the range within which the phone numbers are randomly generated.
     */
    public void setPhoneRange(Range<Integer> phoneRange)
    {
      this.rangeLowerEndpoint = phoneRange.lowerEndpoint();
      this.rangeUpperEndpoint = phoneRange.upperEndpoint();
    }
  
    /**
     * Sets the max seed for random phone number generation
     *
     * @param i the number to initialize the random number phone generator.
     */
    public void setMaxSeedPhoneNumber(int number)
    {
      this.maxSeedPhoneNumber = number;
    }
  
    @InputPortFieldAnnotation(optional = true)
    public final transient DefaultInputPort<Map<String, String>> locationQuery = new DefaultInputPort<Map<String, String>>()
    {
      @Override
      public void process(Map<String, String> tuple)
      {
        seedPhones.emit(tuple);
      }
    };
  
    public final transient DefaultOutputPort<Map<String, String>> seedPhones = new DefaultOutputPort<Map<String, String>>();
  
    @Override
    public void beginWindow(long windowId)
    {
      if (!seedGenerationDone) {
        Random random = new Random();
        int maxPhone = (maxSeedPhoneNumber <= rangeUpperEndpoint && maxSeedPhoneNumber >= rangeLowerEndpoint) ? maxSeedPhoneNumber : rangeUpperEndpoint;
        maxPhone -= 5550000;
        int phonesToDisplay = initialDisplayCount > maxPhone ? maxPhone : initialDisplayCount;
        for (int i = phonesToDisplay; i-- > 0; ) {
          int phoneNo = 5550000 + random.nextInt(maxPhone + 1);
          LOG.info("seed no: " + phoneNo);
          Map<String, String> valueMap = Maps.newHashMap();
          valueMap.put(PhoneMovementGenerator.KEY_COMMAND, PhoneMovementGenerator.COMMAND_ADD);
          valueMap.put(PhoneMovementGenerator.KEY_PHONE, Integer.toString(phoneNo));
          seedPhones.emit(valueMap);
        }
        // done generating data
        seedGenerationDone = true;
        LOG.info("Finished generating seed data.");
      }
    }
  }
  