code: @Override
      public void error(SAXParseException exception) throws SAXException {
          logger.warn("Error on line " + exception.getLineNumber() + ": "
                  + exception.getMessage() + " ... "
                  + "Policy will not be available");
  
          throw new SAXException("error parsing policy");
      }
docs: Standard handler routine for the XML parsing.
  
  @param exception
  information on what caused the problem
  @throws SAXException
  always to halt parsing on errors