protected void parseJdbcDatetime()

in src/main/java/com/aliyun/dts/subscribe/clients/record/value/DateTime.java [624:720]
92 lines of code
33 McCabe index (conditional complexity)

    protected void parseJdbcDatetime(String datetime) {
        if (null == datetime || datetime.trim().isEmpty()) {
            throw new IllegalArgumentException("datetime is null or empty.");
        }
        if (isSet(SEG_COMMON_ERA) && datetime.length() > 2) {
            String commonEra = datetime.substring(datetime.length() - 2);
            if (commonEraNames.contains(commonEra)) {
                this.setCommonEra(commonEra);
                datetime = datetime.substring(0, datetime.length() - 2).trim();
            }
        }
        if (isSet(SEG_TIMEZONE)) {
            int index = -1;
            for (int i = datetime.length() - 1; i >= 0; --i) {
                char c = datetime.charAt(i);
                if (' ' == c || '+' == c || '-' == c) {
                    if (i > 1) {
                        char lc = datetime.charAt(i - 1);
                        if ((lc >= 'a' && lc <= 'z') || (lc >= 'A' && lc <= 'Z')) {
                            continue;
                        }
                    }
                    index = i;
                    break;
                }
            }
            if (index >= 0) {
                String rawTimeZone = datetime.substring(index);
                Triple<Boolean, StringBuilder, StringBuilder> normalizedTimeZone = validateAndConvertTimeZone(rawTimeZone.trim());
                if (normalizedTimeZone.getLeft()) {
                    this.timeOffset = normalizedTimeZone.getMiddle().toString();
                    this.timeZone = normalizedTimeZone.getRight().toString();
                    datetime = datetime.substring(0, datetime.length() - rawTimeZone.length()).trim();
                }
            }
        }
        int[] ret = new int[7];
        int j = 0, m = 0, n = 0;
        byte[] bytes = datetime.getBytes();
        boolean microMode = false;
        for (int i = 0; i < bytes.length && j < bytes.length; ++i) {
            if ('0' <= bytes[i] && '9' >= bytes[i]) {
                m *= 10;
                m += bytes[i] - '0';
                n += 1;
            } else if (0 != n) {
                ret[j] = m;
                if (microMode) {
                    ret[j] = upMicroToNaons(m, 9 - n);
                }
                m = 0;
                n = 0;
                ++j;

                if ('.' == bytes[i]) {
                    microMode = true;
                } else {
                    microMode = false;
                }
            }
        }
        if (n != 0) {
            ret[j] = m;
            if (microMode) {
                ret[j] = upMicroToNaons(m, 9 - n);
            }
        }

        int index = 0;
        if (isSet(SEG_YEAR)) {
            this.setYear(ret[index++]);
        }
        if (isSet(SEG_MONTH)) {
            this.setMonth(ret[index++]);
        }
        if (isSet(SEG_DAY)) {
            this.setDay(ret[index++]);
        }

        if (isSet(SEG_HOUR)) {
            this.setHour(ret[index++]);
        }
        if (isSet(SEG_MINITE)) {
            this.setMinute(ret[index++]);
        }
        if (isSet(SEG_SECOND)) {
            this.setSecond(ret[index++]);
        }

        if (isSet(SEG_NAONS)) {
            this.setNaons(ret[index++]);
        }

        if ('-' == bytes[0]) {
            setSegments(SEG_NEGATIVE);
        }
    }