private String parseTokenValue()

in geronimo-mail_2.1_impl/geronimo-mail_2.1_provider/src/main/java/org/apache/geronimo/mail/authentication/DigestMD5Authenticator.java [478:536]

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

        private String parseTokenValue() {

            StringBuffer value = new StringBuffer();

            while (hasMore()) {
                char ch = currentChar();
                switch (ch) {
                // process the token separators.
                case ' ':
                case '\t':
                case '(':
                case ')':
                case '<':
                case '>':
                case '@':
                case ',':
                case ';':
                case ':':
                case '\\':
                case '"':
                case '/':
                case '[':
                case ']':
                case '?':
                case '=':
                case '{':
                case '}':
                    // no token characters found? this is bad.
                    if (value.length() == 0) {
                        return null;
                    }
                    // return the accumulated characters.
                    return value.toString();

                default:
                    // is this a control character? That's a delimiter (likely
                    // invalid for the next step,
                    // but it is a token terminator.
                    if (ch < 32 || ch > 127) {
                        // no token characters found? this is bad.
                        if (value.length() == 0) {
                            return null;
                        }
                        // return the accumulated characters.
                        return value.toString();
                    }
                    value.append(ch);
                    break;
                }
                // step to the next character.
                nextChar();
            }
            // no token characters found? this is bad.
            if (value.length() == 0) {
                return null;
            }
            // return the accumulated characters.
            return value.toString();
        }