private static function adjust(TemporalAccessor $temporal, DateTimeFormatter $formatter)
{
// normal case first (early return is an optimization)
$overrideChrono = $formatter->getChronology();
$overrideZone = $formatter->getZone();
if ($overrideChrono == null && $overrideZone == null) {
return $temporal;
}
// ensure minimal change (early return is an optimization)
$temporalChrono = $temporal->query(TemporalQueries::chronology());
$temporalZone = $temporal->query(TemporalQueries::zoneId());
if ($temporalChrono !== null && $temporalChrono->equals($overrideChrono)) {
$overrideChrono = null;
}
if ($temporalZone !== null && $temporalZone->equals($overrideZone)) {
$overrideZone = null;
}
if ($overrideChrono === null && $overrideZone === null) {
return $temporal;
}
// make adjustment
$effectiveChrono = $overrideChrono != null ? $overrideChrono : $temporalChrono;
if ($overrideZone != null) {
// if have zone and instant, calculation is simple, defaulting chrono if necessary
if ($temporal->isSupported(ChronoField::INSTANT_SECONDS())) {
$chrono = $effectiveChrono != null ? $effectiveChrono : IsoChronology::INSTANCE();
return $chrono->zonedDateTime(Instant::from($temporal), $overrideZone);
}
// block changing zone on OffsetTime, and similar problem cases
if ($overrideZone->normalized() instanceof ZoneOffset && $temporal->isSupported(ChronoField::OFFSET_SECONDS()) && $temporal->get(ChronoField::OFFSET_SECONDS()) != $overrideZone->getRules()->getOffset(Instant::EPOCH())->getTotalSeconds()) {
throw new DateTimeException("Unable to apply override zone '" . $overrideZone . "' because the temporal object being formatted has a different offset but" . " does not represent an instant: " . $temporal);
}
}
$effectiveZone = $overrideZone !== null ? $overrideZone : $temporalZone;
$effectiveDate = null;
if ($overrideChrono !== null) {
if ($temporal->isSupported(ChronoField::EPOCH_DAY())) {
$effectiveDate = $effectiveChrono->dateFrom($temporal);
} else {
// check for date fields other than epoch-day, ignoring case of converting null to ISO
if (!($overrideChrono == IsoChronology::INSTANCE() && $temporalChrono === null)) {
foreach (ChronoField::values() as $f) {
if ($f->isDateBased() && $temporal->isSupported($f)) {
throw new DateTimeException("Unable to apply override chronology '" . $overrideChrono . "' because the temporal object being formatted contains date fields but" . " does not represent a whole date: " . $temporal);
}
}
}
$effectiveDate = null;
}
} else {
$effectiveDate = null;
}
// combine available data
// this is a non-standard temporal that is almost a pure delegate
// this better handles map-like underlying temporal instances
return new Test($effectiveDate, $temporal, $effectiveZone, $effectiveChrono);
}
/**
* Gets the effective chronology during parsing.
*
* @return Chronology the effective parsing chronology, not null
*/
public function getEffectiveChronology()
{
$chrono = $this->currentParsed()->chrono;
if ($chrono == null) {
$chrono = $this->formatter->getChronology();
if ($chrono == null) {
$chrono = IsoChronology::INSTANCE();
}
}
return $chrono;
}