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 com.datatorrent.api.DefaultInputPort;
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.common.util.BaseOperator;
  
  import twitter4j.HashtagEntity;
  import twitter4j.Status;
  
  /**
   * <p>TwitterStatusHashtagExtractor class.</p>
   *
   * @since 1.0.2
   */
  public class TwitterStatusHashtagExtractor extends BaseOperator
  {
    public final transient DefaultOutputPort<String> hashtags = new DefaultOutputPort<String>();
    public final transient DefaultInputPort<Status> input = new DefaultInputPort<Status>()
    {
      @Override
      public void process(Status status)
      {
        HashtagEntity[] entities = status.getHashtagEntities();
        if (entities != null) {
          for (HashtagEntity he : entities) {
            if (he != null) {
              hashtags.emit(he.getText());
            }
          }
        }
      }
  
    };
  }
  