/**
* @inheritdoc
*/
public function isUnitSupported(TemporalUnit $unit)
{
if ($unit instanceof ChronoUnit) {
return $unit->isDateBased();
}
return $unit != null && $unit->isSupportedBy($this);
}
/**
* Checks if the specified unit is supported.
* <p>
* This checks if the specified unit can be added to, or subtracted from, this year.
* If false, then calling the {@link #plus(long, TemporalUnit)} and
* {@link #minus(long, TemporalUnit) minus} methods will throw an exception.
* <p>
* If the unit is a {@link ChronoUnit} then the query is implemented here.
* The supported units are:
* <ul>
* <li>{@code YEARS}
* <li>{@code DECADES}
* <li>{@code CENTURIES}
* <li>{@code MILLENNIA}
* <li>{@code ERAS}
* </ul>
* All other {@code ChronoUnit} instances will return false.
* <p>
* If the unit is not a {@code ChronoUnit}, then the result of this method
* is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)}
* passing {@code this} as the argument.
* Whether the unit is supported is determined by the unit.
*
* @param TemporalUnit $unit the unit to check, null returns false
* @return bool true if the unit can be added/subtracted, false if not
*/
public function isUnitSupported(TemporalUnit $unit)
{
if ($unit instanceof ChronoUnit) {
return $unit == ChronoUnit::YEARS() || $unit == ChronoUnit::DECADES() || $unit == ChronoUnit::CENTURIES() || $unit == ChronoUnit::MILLENNIA() || $unit == ChronoUnit::ERAS();
}
return $unit != null && $unit->isSupportedBy($this);
}
