private Source get(MessageContext mc) throws JAXBException {
      String path = (String)mc.get(MessageContext.PATH_INFO);
        if((path.indexOf("/errortest")!=-1)  || path.equals("") || path.equals("/")){
           mc.put(MessageContext.HTTP_RESPONSE_CODE, 400);
           POProcessingProblem fault= new POProcessingProblem();
          fault.setMessage("Unable to retrieve the order associated with the orderid 
                          you specified");
           return new JAXBSource(jc, new objectFactory().createPOProcessingFault(fault));
                             }
           }