question: protected void error ( String msg , Exception e ) throws org . xml . sax . SAXException { SAXSourceLocator locator = getLocator ( ) ; ErrorListener handler = m_stylesheetProcessor . getErrorListener ( ) ; TransformerException pe ; if ( ! ( e instanceof TransformerException ) ) { pe = ( null == e ) ? new TransformerException ( msg , locator ) : new TransformerException ( msg , locator , e ) ; } else pe = ( TransformerException ) e ; if ( null != handler ) { try { handler . error ( pe ) ; } catch ( TransformerException te ) { throw new org . xml . sax . SAXException ( te ) ; } } else throw new org . xml . sax . SAXException ( pe ) ; }
target:  Tell the user of an error, and probably throw an exception.