private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
  in.defaultReadObject();
  if ((objBytes == null) && ((hash != 13) || (locBytes != null)))   throw new InvalidObjectException("Bad hash or annotation");
}

private void readObject ( ObjectInputStream in ) throws IOException , ClassNotFoundException { in . defaultReadObject ( ) ; if ( ( objBytes == null ) && ( ( hash != 13 ) || ( locBytes != null ) ) ) throw new InvalidObjectException ( "Bad hash or annotation" ) ; }
verify the case of null contained object .
