/**
  * This is called when a warning is received in the data stream.
  *
  * @param message The warning message.
  * @throws EInvalidData
  */
 public void onWarning(String message) throws EInvalidData {
   if (_eventHandler != null) {
     _eventHandler.onWarning(this, message);
   } else if (_multiEventHandler != null) {
     _multiEventHandler.onWarning(this, message);
   }
   // If we don't have a handler for this event, swallow it!
 }