public static String decode()

in src/main/java/org/apache/openejb/tools/release/util/JarLocation.java [81:121]

• 29 lines of code
• 9 McCabe index (conditional complexity)

    public static String decode(final String fileName) {
        if (fileName.indexOf('%') == -1) return fileName;

        final StringBuilder result = new StringBuilder(fileName.length());
        final ByteArrayOutputStream out = new ByteArrayOutputStream();

        for (int i = 0; i < fileName.length(); ) {
            final char c = fileName.charAt(i);

            if (c == '%') {
                out.reset();
                do {
                    if (i + 2 >= fileName.length()) {
                        throw new IllegalArgumentException("Incomplete % sequence at: " + i);
                    }

                    final int d1 = Character.digit(fileName.charAt(i + 1), 16);
                    final int d2 = Character.digit(fileName.charAt(i + 2), 16);

                    if (d1 == -1 || d2 == -1) {
                        throw new IllegalArgumentException("Invalid % sequence (" + fileName.substring(i, i + 3) + ") at: " + String.valueOf(i));
                    }

                    out.write((byte) ((d1 << 4) + d2));

                    i += 3;

                } while (i < fileName.length() && fileName.charAt(i) == '%');


                result.append(out.toString());

                continue;
            } else {
                result.append(c);
            }

            i++;
        }
        return result.toString();
    }