question: private static String parseToken ( String pattern , int [ ] indexRef ) { StringBuffer buf = new StringBuffer ( ) ; int i = indexRef [ 0 ] ; int length = pattern . length ( ) ; char c = pattern . charAt ( i ) ; if ( c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' ) { buf . append ( c ) ; while ( i + 1 < length ) { char peek = pattern . charAt ( i + 1 ) ; if ( peek == c ) { buf . append ( c ) ; i ++ ; } else { break ; } } } else { buf . append ( '\'' ) ; boolean inLiteral = false ; for ( ; i < length ; i ++ ) { c = pattern . charAt ( i ) ; if ( c == '\'' ) { if ( i + 1 < length && pattern . charAt ( i + 1 ) == '\'' ) { i ++ ; buf . append ( c ) ; } else { inLiteral = ! inLiteral ; } } else if ( ! inLiteral && ( c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' ) ) { i -- ; break ; } else { buf . append ( c ) ; } } } indexRef [ 0 ] = i ; return buf . toString ( ) ; }
target:  Parses an individual token.