question: public void index ( Tuple t , String field ) { String s ; if ( ( s = t . getString ( field ) ) == null ) return ; StringTokenizer st = new StringTokenizer ( s , m_delim ) ; while ( st . hasMoreTokens ( ) ) { String tok = st . nextToken ( ) ; addString ( tok , t ) ; } }
target:  Indexes the given field of the provided Tuple instance.