public int translate()

in src/main/java/org/apache/commons/text/translate/UnicodeUnescaper.java [42:71]

• 25 lines of code
• 10 McCabe index (conditional complexity)

    public int translate(final CharSequence input, final int index, final Writer writer) throws IOException {
        if (input.charAt(index) == '\\' && index + 1 < input.length() && input.charAt(index + 1) == 'u') {
            // consume optional additional 'u' chars
            int i = 2;
            while (index + i < input.length() && input.charAt(index + i) == 'u') {
                i++;
            }

            if (index + i < input.length() && input.charAt(index + i) == '+') {
                i++;
            }

            if (index + i + 4 <= input.length()) {
                // Get 4 hex digits
                final CharSequence unicode = input.subSequence(index + i, index + i + 4);

                try {
                    final int value = Integer.parseInt(unicode.toString(), 16);
                    writer.write((char) value);
                } catch (final NumberFormatException nfe) {
                    throw new IllegalArgumentException("Unable to parse unicode value: " + unicode, nfe);
                }
                return i + 4;
            }
            throw new IllegalArgumentException("Less than 4 hex digits in unicode value: '"
                    + input.subSequence(index, input.length())
                    + "' due to end of CharSequence");
        }
        return 0;
    }