/**
  * Exception processor for exceptions detected from the parser. (This is invoked by the parser
  * when an error is detected).
  *
  * @param sipMessage -- the message that incurred the error.
  * @param ex -- parse exception detected by the parser.
  * @param header -- header that caused the error.
  * @throws ParseException Thrown if we want to reject the message.
  */
 public void handleException(
     ParseException ex, SIPMessage sipMessage, Class hdrClass, String header, String message)
     throws ParseException {
   if (LogWriter.needsLogging) stack.logWriter.logException(ex);
   // Log the bad message for later reference.
   if ((hdrClass != null)
       && (hdrClass.equals(From.class)
           || hdrClass.equals(To.class)
           || hdrClass.equals(CSeq.class)
           || hdrClass.equals(Via.class)
           || hdrClass.equals(CallID.class)
           || hdrClass.equals(RequestLine.class)
           || hdrClass.equals(StatusLine.class))) {
     stack.logBadMessage(message);
     throw ex;
   } else {
     sipMessage.addUnparsed(header);
   }
 }