Method getWeekOfYear

base/src/main/java/net/time4j/YOWElement.java:203–227

(PlainDate date)

    // Optimierung als Ersatz für date.getWeekOfYear()
    private static int getWeekOfYear(PlainDate date) {

        int dayOfYear = date.getDayOfYear();
        int wCurrent = getFirstCalendarWeekAsDayOfYear(date, 0);

        if (wCurrent <= dayOfYear) {
            int result = ((dayOfYear - wCurrent) / 7) + 1;

            if (result >= 53) { // Optimierung
                int wNext =
                    getFirstCalendarWeekAsDayOfYear(date, 1)
                    + getLengthOfYear(date, 0);
                if (wNext <= dayOfYear) {
                    result = 1;
                }
            }

            return result;
        } else {
            int wPrevious = getFirstCalendarWeekAsDayOfYear(date, -1);
            int dayCurrent = dayOfYear + getLengthOfYear(date, -1);
            return ((dayCurrent - wPrevious) / 7) + 1;
        }

    }

    private Object readResolve() throws ObjectStreamException {