public final Iso8601DateTimeParser set()

in java/commons/src/main/java/com/epam/deltix/data/connectors/commons/Iso8601DateTimeParser.java [26:115]
71 lines of code
13 McCabe index (conditional complexity)

    public final Iso8601DateTimeParser set(final CharSequence from) {
        int idx = 0;

        final int year = (from.charAt(idx++) - '0') * 1000 +
                (from.charAt(idx++) - '0') * 100 +
                (from.charAt(idx++) - '0') * 10
                + (from.charAt(idx++) - '0');

        if (from.charAt(idx++) != '-') {
            throw new IllegalArgumentException("Expected '-' at " + idx);
        }

        final int month = (from.charAt(idx++) - '0') * 10 +
                (from.charAt(idx++) - '0');

        if (from.charAt(idx++) != '-') {
            throw new IllegalArgumentException("Expected '-' at " + idx);
        }

        final int day = (from.charAt(idx++) - '0') * 10 +
                (from.charAt(idx++) - '0');

        long valueDay = year * 10000L + month * 100L + day;

        if (lastValueDay != valueDay) {
            lastValueDayMidnightCalendar.set(Calendar.YEAR, year);
            lastValueDayMidnightCalendar.set(Calendar.MONTH, month - 1);
            lastValueDayMidnightCalendar.set(Calendar.DAY_OF_MONTH, day);
            lastValueDayMidnightCalendar.set(Calendar.HOUR_OF_DAY, 0);
            lastValueDayMidnightCalendar.set(Calendar.MINUTE, 0);
            lastValueDayMidnightCalendar.set(Calendar.SECOND, 0);
            lastValueDayMidnightCalendar.set(Calendar.MILLISECOND, 0);

            lastValueDayMidnight = lastValueDayMidnightCalendar.getTimeInMillis();

            lastValueDay = valueDay;
        }

        if (from.charAt(idx++) != 'T') {
            throw new IllegalArgumentException("Expected 'T' at " + idx);
        }
        millis = lastValueDayMidnight +
                TimeUnit.HOURS.toMillis((from.charAt(idx++) - '0') * 10L +
                        (from.charAt(idx++) - '0'));

        if (from.charAt(idx++) != ':') {
            throw new IllegalArgumentException("Expected ':' at " + idx);
        }
        millis += TimeUnit.MINUTES.toMillis((from.charAt(idx++) - '0') * 10L +
                (from.charAt(idx++) - '0'));

        if (from.charAt(idx++) != ':') {
            throw new IllegalArgumentException("Expected ':' at " + idx);
        }
        millis += TimeUnit.SECONDS.toMillis((from.charAt(idx++) - '0') * 10L +
                (from.charAt(idx++) - '0'));

        nanos = 0;

        if (from.length() > 20) {    // .SSS
            if (from.charAt(idx++) != '.') {
                throw new IllegalArgumentException("Expected '.' at " + idx);
            }
            millis = millis +
                    (from.charAt(idx++) - '0') * 100L +
                    (from.charAt(idx++) - '0') * 10L +
                    (from.charAt(idx++) - '0');

            if (from.length() > 24) { // .SSSSSS
                nanos = (from.charAt(idx++) - '0') * 100_000 +
                        (from.charAt(idx++) - '0') * 10_000 +
                        (from.charAt(idx++) - '0') * 1_000;

                if (from.length() > 27) { // .SSSSSSSSS
                    nanos += (from.charAt(idx++) - '0') * 100 +
                            (from.charAt(idx++) - '0') * 10 +
                            (from.charAt(idx++) - '0');
                }
            }
        }

        // check the timezone if exists
        if (from.length() > idx) {
            if (from.charAt(idx) != 'Z') {
                throw new IllegalArgumentException("Expected 'Z' timezone at " + idx);
            }
        }

        return this;
    }