static String unicodeToASCII()

in src/main/java/org/apache/commons/validator/routines/DomainValidator.java [2247:2278]

27 lines of code
9 McCabe index (conditional complexity)


    static String unicodeToASCII(final String input) {
        if (isOnlyASCII(input)) { // skip possibly expensive processing
            return input;
        }
        try {
            final String ascii = IDN.toASCII(input);
            if (IDNBUGHOLDER.IDN_TOASCII_PRESERVES_TRAILING_DOTS) {
                return ascii;
            }
            final int length = input.length();
            if (length == 0) {// check there is a last character
                return input;
            }
            // RFC3490 3.1. 1)
            //            Whenever dots are used as label separators, the following
            //            characters MUST be recognized as dots: U+002E (full stop), U+3002
            //            (ideographic full stop), U+FF0E (fullwidth full stop), U+FF61
            //            (halfwidth ideographic full stop).
            final char lastChar = input.charAt(length-1);// fetch original last char
            switch(lastChar) {
                case '\u002E': // "." full stop
                case '\u3002': // ideographic full stop
                case '\uFF0E': // fullwidth full stop
                case '\uFF61': // halfwidth ideographic full stop
                    return ascii + "."; // restore the missing stop
                default:
                    return ascii;
            }
        } catch (final IllegalArgumentException e) { // input is not valid
            return input;
        }
    }