Additional constructor requested in BytesWritable
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         Key: HADOOP-310
         URL: http://issues.apache.org/jira/browse/HADOOP-310
     Project: Hadoop
        Type: Improvement

  Components: io  
    Reporter: paul sutter
    Priority: Minor



It would be grand if BytesWritable.java had an additional constructor as below. 
This allows me to use the BytesWritable class without doing a buffer copy, 
since we have a less-than-fully-utilized byte array holding our key.

Thanks!
 
 /**
   * Create a BytesWritable using the byte array as the initial value.
   * @param bytes This array becomes the backing storage for the object.
   */
  public BytesWritable(byte[] bytes, int size) {
    this.bytes = bytes;
    this.size = size;
  }
  


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