question: public String process ( String to_process ) { if ( to_process == null || to_process . length ( ) == 0 ) return "" ; String tmp = "" ; StringTokenizer st = new StringTokenizer ( to_process , " " , true ) ; StringBuffer newValue = new StringBuffer ( to_process . length ( ) + 50 ) ; while ( st . hasMoreTokens ( ) ) { tmp = st . nextToken ( ) ; if ( hasAttribute ( tmp ) ) newValue . append ( ( String ) get ( tmp ) ) ; else newValue . append ( tmp ) ; } return newValue . toString ( ) ; }
target:  this method actually performs the filtering.