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 java.nio.ByteBuffer;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import com.datatorrent.api.StreamCodec;
  import com.datatorrent.netlet.util.Slice;
  
  /**
   * <p>URLSerDe class.</p>
   *
   * @since 0.3.2
   */
  public class URLSerDe implements StreamCodec<byte[]>
  {
    /**
     * Covert the bytes into object useful for downstream node.
     *
     * @param fragment
     * @return WindowedURLHolder object which represents the bytes.
     */
    @Override
    public byte[] fromByteArray(Slice fragment)
    {
      if (fragment == null || fragment.buffer == null) {
        return null;
      } else if (fragment.offset == 0 && fragment.length == fragment.buffer.length) {
        return fragment.buffer;
      } else {
        byte[] buffer = new byte[fragment.buffer.length];
        System.arraycopy(fragment.buffer, fragment.offset, buffer, 0, fragment.length);
        return buffer;
      }
    }
  
    /**
     * Cast the input object to byte[].
     *
     * @param object - byte array representing the bytes of the string
     * @return the same object as input
     */
    @Override
    public Slice toByteArray(byte[] object)
    {
      return new Slice(object, 0, object.length);
    }
  
    @Override
    public int getPartition(byte[] object)
    {
      ByteBuffer bb = ByteBuffer.wrap(object);
      return bb.hashCode();
    }
  
    private static final Logger logger = LoggerFactory.getLogger(URLSerDe.class);
  }
  