private SectionType decode()

in protocols/imap/src/main/java/org/apache/james/imap/decode/FetchPartPathDecoder.java [69:143]
61 lines of code
19 McCabe index (conditional complexity)

    private SectionType decode(int at, CharSequence sectionSpecification) throws DecodingException {
        SectionType result;
        int length = sectionSpecification.length();
        if (at < length) {
            final char next = sectionSpecification.charAt(at);
            switch (next) {
            case '.':
                separator();
                result = decode(at + 1, sectionSpecification);
                break;

            case '0':
                result = digit(at, sectionSpecification, 0);
                break;

            case '1':
                result = digit(at, sectionSpecification, 1);
                break;

            case '2':
                result = digit(at, sectionSpecification, 2);
                break;

            case '3':
                result = digit(at, sectionSpecification, 3);
                break;

            case '4':
                result = digit(at, sectionSpecification, 4);
                break;

            case '5':
                result = digit(at, sectionSpecification, 5);
                break;

            case '6':
                result = digit(at, sectionSpecification, 6);
                break;

            case '7':
                result = digit(at, sectionSpecification, 7);
                break;

            case '8':
                result = digit(at, sectionSpecification, 8);
                break;

            case '9':
                result = digit(at, sectionSpecification, 9);
                break;

            case 't':
            case 'T':
                result = text(at, sectionSpecification);
                break;

            case 'h':
            case 'H':
                result = header(at, sectionSpecification);
                break;

            case 'm':
            case 'M':
                result = mime(at, sectionSpecification);
                break;

            default:
                throw new DecodingException(HumanReadableText.ILLEGAL_ARGUMENTS, "Did not expect '" + next + "' here in body specification.");
            }
        } else {
            storePartial();
            result = SectionType.CONTENT;
        }
        return result;
    }