question: public void error ( XPathContext xctxt , String msg , Object [ ] args ) throws javax . xml . transform . TransformerException { java . lang . String fmsg = XSLMessages . createXPATHMessage ( msg , args ) ; if ( null != xctxt ) { ErrorListener eh = xctxt . getErrorListener ( ) ; TransformerException te = new TransformerException ( fmsg , this ) ; eh . fatalError ( te ) ; } }
target:  Tell the user of an error, and probably throw an exception.