public static int decodeMonth()

in protocols/imap/src/main/java/org/apache/james/imap/decode/DecoderUtils.java [247:403]
156 lines of code
61 McCabe index (conditional complexity)

    public static int decodeMonth(char monthFirstChar, char monthSecondChar, char monthThirdChar) throws DecodingException {
        final int result;
        // Bitwise magic! Eliminate possibility by three switches
        int possibleMonths = ALL_MONTH_BITS;
        switch (monthFirstChar) {
        case 'J':
        case 'j':
            possibleMonths &= (JAN_BIT | JUN_BIT | JUL_BIT);
            break;
        case 'F':
        case 'f':
            possibleMonths &= FEB_BIT;
            break;
        case 'M':
        case 'm':
            possibleMonths &= (MAR_BIT | MAY_BIT);
            break;
        case 'A':
        case 'a':
            possibleMonths &= (APR_BIT | AUG_BIT);
            break;
        case 'S':
        case 's':
            possibleMonths &= SEP_BIT;
            break;
        case 'O':
        case 'o':
            possibleMonths &= OCT_BIT;
            break;
        case 'N':
        case 'n':
            possibleMonths &= NOV_BIT;
            break;
        case 'D':
        case 'd':
            possibleMonths &= DEC_BIT;
            break;
        default:
            possibleMonths = 0;
            break;
        }
        switch (monthSecondChar) {
        case 'A':
        case 'a':
            possibleMonths &= (JAN_BIT | MAR_BIT | MAY_BIT);
            break;
        case 'E':
        case 'e':
            possibleMonths &= (FEB_BIT | SEP_BIT | DEC_BIT);
            break;
        case 'P':
        case 'p':
            possibleMonths &= (APR_BIT);
            break;
        case 'U':
        case 'u':
            possibleMonths &= (JUN_BIT | JUL_BIT | AUG_BIT);
            break;
        case 'C':
        case 'c':
            possibleMonths &= OCT_BIT;
            break;
        case 'O':
        case 'o':
            possibleMonths &= NOV_BIT;
            break;
        default:
            possibleMonths = 0;
            break;
        }
        switch (monthThirdChar) {
        case 'N':
        case 'n':
            possibleMonths &= (JAN_BIT | JUN_BIT);
            break;
        case 'B':
        case 'b':
            possibleMonths &= FEB_BIT;
            break;
        case 'R':
        case 'r':
            possibleMonths &= (MAR_BIT | APR_BIT);
            break;
        case 'Y':
        case 'y':
            possibleMonths &= MAY_BIT;
            break;
        case 'L':
        case 'l':
            possibleMonths &= JUL_BIT;
            break;
        case 'G':
        case 'g':
            possibleMonths &= AUG_BIT;
            break;
        case 'P':
        case 'p':
            possibleMonths &= SEP_BIT;
            break;
        case 'T':
        case 't':
            possibleMonths &= OCT_BIT;
            break;
        case 'V':
        case 'v':
            possibleMonths &= NOV_BIT;
            break;
        case 'C':
        case 'c':
            possibleMonths &= DEC_BIT;
            break;
        default:
            possibleMonths = 0;
            break;
        }
        switch (possibleMonths) {
        case JAN_BIT:
            result = Calendar.JANUARY;
            break;
        case FEB_BIT:
            result = Calendar.FEBRUARY;
            break;
        case MAR_BIT:
            result = Calendar.MARCH;
            break;
        case APR_BIT:
            result = Calendar.APRIL;
            break;
        case MAY_BIT:
            result = Calendar.MAY;
            break;
        case JUN_BIT:
            result = Calendar.JUNE;
            break;
        case JUL_BIT:
            result = Calendar.JULY;
            break;
        case AUG_BIT:
            result = Calendar.AUGUST;
            break;
        case SEP_BIT:
            result = Calendar.SEPTEMBER;
            break;
        case OCT_BIT:
            result = Calendar.OCTOBER;
            break;
        case NOV_BIT:
            result = Calendar.NOVEMBER;
            break;
        case DEC_BIT:
            result = Calendar.DECEMBER;
            break;
        default:
            throw new DecodingException(HumanReadableText.ILLEGAL_ARGUMENTS, "Expected month name but was " + monthFirstChar + monthSecondChar + monthThirdChar);
        }
        return result;
    }