/** * Map the field range to a week range of a week year. * @param TemporalAccessor $temporal the temporal * @return ValueRange the ValueRange with the range adjusted to weeks. */ private function rangeWeekOfWeekBasedYear(TemporalAccessor $temporal) { if (!$temporal->isSupported(CF::DAY_OF_YEAR())) { return self::WEEK_OF_YEAR_RANGE(); } $dow = $this->localizedDayOfWeek($temporal); $doy = $temporal->get(CF::DAY_OF_YEAR()); $offset = $this->startOfWeekOffset($doy, $dow); $week = $this->computeWeek($offset, $doy); if ($week === 0) { // Day is in end of week of previous year // Recompute from the last day of the previous year $date = AbstractChronology::from($temporal)->dateFrom($temporal); $date = $date->minus($doy + 7, ChronoUnit::DAYS()); // Back down into previous year return $this->rangeWeekOfWeekBasedYear($date); } // Check if day of year is in partial week associated with next year $dayRange = $temporal->range(CF::DAY_OF_YEAR()); $yearLen = $dayRange->getMaximum(); $newYearWeek = $this->computeWeek($offset, $yearLen + $this->weekDef->getMinimalDaysInFirstWeek()); if ($week >= $newYearWeek) { // Overlaps with weeks of following year; recompute from a week in following year $date = AbstractChronology::from($temporal)->dateFrom($temporal); $date = $date->plus($yearLen - $doy + 1 + 7, ChronoUnit::DAYS()); return $this->rangeWeekOfWeekBasedYear($date); } return ValueRange::of(1, $newYearWeek - 1); }