public function range(TemporalField $field)
{
if ($field instanceof ChronoField) {
if ($this->isSupported($field)) {
$f = $field;
switch ($f) {
case CF::DAY_OF_MONTH():
case CF::DAY_OF_YEAR():
case CF::ALIGNED_WEEK_OF_MONTH():
return $this->isoDate->range($field);
case CF::YEAR_OF_ERA():
$range = CF::YEAR()->range();
$max = $this->getProlepticYear() <= 0 ? -($range->getMinimum() + ThaiBuddhistChronology::YEARS_DIFFERENCE) + 1 : $range->getMaximum() + ThaiBuddhistChronology::YEARS_DIFFERENCE;
return ValueRange::of(1, $max);
}
return $this->getChronology()->range($f);
}
throw new UnsupportedTemporalTypeException("Unsupported field: " . $field);
}
return $field->rangeRefinedBy($this);
}
/**
* Gets the range of valid values for the specified field.
* <p>
* The range object expresses the minimum and maximum valid values for a field.
* This date-time is used to enhance the accuracy of the returned range.
* If it is not possible to return the range, because the field is not supported
* or for some other reason, an exception is thrown.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@link #isSupported(TemporalField) supported fields} will return
* appropriate range instances.
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
* passing {@code this} as the argument.
* Whether the range can be obtained is determined by the field.
*
* @param TemporalField $field the field to query the range for, not null
* @return ValueRange the range of valid values for the field, not null
* @throws DateTimeException if the range for the field cannot be obtained
* @throws UnsupportedTemporalTypeException if the field is not supported
*/
public function range(TemporalField $field)
{
if ($field instanceof ChronoField) {
$f = $field;
return $f->isTimeBased() ? $this->time->range($field) : $this->date->range($field);
}
return $field->rangeRefinedBy($this);
}