question: public void startElement ( String uri , String localName , String qName , Attributes attributes ) throws SAXException { try { if ( qName . equals ( "packages" ) && packages . size ( ) > 0 ) { throw new RuntimeException ( "packages can not be specified in ASDoc_Config.xml and as a Flex parameter" ) ; } writer . newLine ( ) ; writer . write ( "<" + qName ) ; for ( int i = 0 ; i < attributes . getLength ( ) ; i ++ ) { writer . write ( " " + attributes . getQName ( i ) + "=\"" + attributes . getValue ( i ) + "\"" ) ; } writer . write ( ">" ) ; } catch ( IOException ioe ) { throw new SAXException ( ioe ) ; } }
target:  implementation for Default Handler method 