/**
* Obtains an instance of {@code Duration} from a temporal amount.
* <p>
* This obtains a duration based on the specified amount.
* A {@code TemporalAmount} represents an amount of time, which may be
* date-based or time-based, which this factory extracts to a duration.
* <p>
* The conversion loops around the set of units from the amount and uses
* the {@linkplain TemporalUnit#getDuration() duration} of the unit to
* calculate the total {@code Duration}.
* Only a subset of units are accepted by this method. The unit must either
* have an {@linkplain TemporalUnit#isDurationEstimated() exact duration}
* or be {@link ChronoUnit#DAYS} which is treated as 24 hours.
* If any other units are found then an exception is thrown.
*
* @param TemporalAmount $amount the temporal amount to convert, not null
* @return Duration the equivalent duration, not null
* @throws DateTimeException if unable to convert to a {@code Duration}
* @throws ArithmeticException if numeric overflow occurs
*/
public static function from(TemporalAmount $amount)
{
$duration = self::$ZERO;
foreach ($amount->getUnits() as $unit) {
$duration = $duration->plus($amount->get($unit), $unit);
}
return $duration;
}
/**
* Obtains an instance of {@code Period} from a temporal amount.
* <p>
* This obtains a period based on the specified amount.
* A {@code TemporalAmount} represents an amount of time, which may be
* date-based or time-based, which this factory extracts to a {@code Period}.
* <p>
* The conversion loops around the set of units from the amount and uses
* the {@link ChronoUnit#YEARS YEARS}, {@link ChronoUnit#MONTHS MONTHS}
* and {@link ChronoUnit#DAYS DAYS} units to create a period.
* If any other units are found then an exception is thrown.
* <p>
* If the amount is a {@code ChronoPeriod} then it must use the ISO chronology.
*
* @param TemporalAmount $amount the temporal amount to convert, not null
* @return Period the equivalent period, not null
* @throws DateTimeException if unable to convert to a {@code Period}
* @throws ArithmeticException if the amount of years, months or days exceeds an int
*/
public static function from(TemporalAmount $amount)
{
if ($amount instanceof Period) {
return $amount;
}
if ($amount instanceof ChronoPeriod) {
if (IsoChronology::INSTANCE()->equals($amount->getChronology()) == false) {
throw new DateTimeException("Period requires ISO chronology: " . $amount);
}
}
$years = 0;
$months = 0;
$days = 0;
foreach ($amount->getUnits() as $unit) {
$unitAmount = $amount->get($unit);
if ($unit == ChronoUnit::YEARS()) {
$years = Math::toIntExact($unitAmount);
} else {
if ($unit == ChronoUnit::MONTHS()) {
$months = Math::toIntExact($unitAmount);
} else {
if ($unit == ChronoUnit::DAYS()) {
$days = Math::toIntExact($unitAmount);
} else {
throw new DateTimeException("Unit must be Years, Months or Days, but was " . $unit);
}
}
}
}
return self::create($years, $months, $days);
}
