public static int parseTimePart()

in asterixdb/asterix-om/src/main/java/org/apache/asterix/om/base/temporal/ATimeParserFactory.java [66:160]
73 lines of code
37 McCabe index (conditional complexity)

    public static int parseTimePart(String timeString, int start, int length) throws HyracksDataException {
        int offset = 0;

        int hour = 0, min = 0, sec = 0, millis = 0;
        int timezone = 0;

        boolean isExtendedForm = false;
        if (timeString.charAt(start + offset + 2) == ':') {
            isExtendedForm = true;
        }

        if (isExtendedForm
                && (timeString.charAt(start + offset + 2) != ':' || timeString.charAt(start + offset + 5) != ':')) {
            throw new HyracksDataException(timeErrorMessage + ": Missing colon in an extended time format.");
        }
        // hour
        for (int i = 0; i < 2; i++) {
            if ((timeString.charAt(start + offset + i) >= '0' && timeString.charAt(start + offset + i) <= '9')) {
                hour = hour * 10 + timeString.charAt(start + offset + i) - '0';
            } else {
                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in hour field");
            }
        }

        if (hour < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.HOUR.ordinal()]
                || hour > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.HOUR.ordinal()]) {
            throw new HyracksDataException(timeErrorMessage + ": hour " + hour);
        }

        offset += (isExtendedForm) ? 3 : 2;

        // minute
        for (int i = 0; i < 2; i++) {
            if ((timeString.charAt(start + offset + i) >= '0' && timeString.charAt(start + offset + i) <= '9')) {
                min = min * 10 + timeString.charAt(start + offset + i) - '0';
            } else {
                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in minute field");
            }
        }

        if (min < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]
                || min > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]) {
            throw new HyracksDataException(timeErrorMessage + ": min " + min);
        }

        offset += (isExtendedForm) ? 3 : 2;

        // second
        for (int i = 0; i < 2; i++) {
            if ((timeString.charAt(start + offset + i) >= '0' && timeString.charAt(start + offset + i) <= '9')) {
                sec = sec * 10 + timeString.charAt(start + offset + i) - '0';
            } else {
                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in second field");
            }
        }

        if (sec < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.SECOND.ordinal()]
                || sec > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.SECOND.ordinal()]) {
            throw new HyracksDataException(timeErrorMessage + ": sec " + sec);
        }

        offset += 2;

        if ((isExtendedForm && length > offset && timeString.charAt(start + offset) == '.')
                || (!isExtendedForm && length > offset)) {

            offset += (isExtendedForm) ? 1 : 0;
            int i = 0;
            for (; i < 3 && offset + i < length; i++) {
                if (timeString.charAt(start + offset + i) >= '0' && timeString.charAt(start + offset + i) <= '9') {
                    millis = millis * 10 + timeString.charAt(start + offset + i) - '0';
                } else {
                    break;
                }
            }

            offset += i;

            for (; i < 3; i++) {
                millis = millis * 10;
            }

            // error is thrown if more than three digits are seen for the millisecond part
            if (length > offset && timeString.charAt(start + offset) >= '0'
                    && timeString.charAt(start + offset) <= '9') {
                throw new HyracksDataException(timeErrorMessage + ": too many fields for millisecond.");
            }
        }

        if (length > offset) {
            parseTimezonePart(timeString, start + offset); // parsed, then ignored
        }

        return GregorianCalendarSystem.getInstance().getChronon(hour, min, sec, millis);
    }