/**
* Gets the formatter to use.
* <p>
* The formatter will be the most appropriate to use for the date and time style in the locale.
* For example, some locales will use the month name while others will use the number.
*
* @param Locale $locale the locale to use, not null
* @param Chronology $chrono the chronology to use, not null
* @return DateTimeFormatter the formatter, not null
* @throws IllegalArgumentException if the formatter cannot be found
*/
private function formatter(Locale $locale, Chronology $chrono)
{
$key = $chrono->getId() . '|' . $locale . '|' . $this->dateStyle . '|' . $this->timeStyle;
$formatter = @self::$FORMATTER_CACHE[$key];
if ($formatter === null) {
$pattern = DateTimeFormatterBuilder::getLocalizedDateTimePattern($this->dateStyle, $this->timeStyle, $chrono, $locale);
$formatter = (new DateTimeFormatterBuilder())->appendPattern($pattern)->toFormatter2($locale);
$old = self::$FORMATTER_CACHE[$key] = $formatter;
if ($old !== null) {
$formatter = $old;
}
}
return $formatter;
}
/**
* Returns the chronology name of the given chrono in the given locale
* if available, or the chronology Id otherwise. The regular ResourceBundle
* search path is used for looking up the chronology name.
*
* @param Chronology $chrono the chronology, not null
* @param Locale $locale the locale, not null
* @return string the chronology name of chrono in locale, or the id if no name is available
* @throws NullPointerException if chrono or locale is null
*/
private function getChronologyName(Chronology $chrono, Locale $locale)
{
$key = "calendarname." . $chrono->getCalendarType();
$name = DateTimeTextProvider::getLocalizedResource($key, $locale);
return $name != null ? $name : $chrono->getId();
}
/**
* Casts the {@code Temporal} to {@code ChronoLocalDate} ensuring it bas the specified chronology.
*
* @param Chronology $chrono the chronology to check for, not null
* @param Temporal $temporal a date-time to cast, not null
* @return static the date-time checked and cast to {@code ChronoLocalDate}, not null
* @throws ClassCastException if the date-time cannot be cast to ChronoLocalDate
* or the chronology is not equal this Chronology
*/
static function ensureValid(Chronology $chrono, Temporal $temporal)
{
/** @var ChronoLocalDate $other */
$other = $temporal;
if ($chrono->equals($other->getChronology()) === false) {
throw new ClassCastException("Chronology mismatch, expected: " . $chrono->getId() . ", actual: " . $other->getChronology()->getId());
}
return $other;
}
/**
* Compares this chronology to another chronology.
* <p>
* The comparison order first by the chronology ID string, then by any
* additional information specific to the subclass.
* It is "consistent with equals", as defined by {@link Comparable}.
*
* @implSpec
* This implementation compares the chronology ID.
* Subclasses must compare any additional state that they store.
*
* @param Chronology $other the other chronology to compare to, not null
* @return int the comparator value, negative if less, positive if greater
*/
public function compareTo(Chronology $other)
{
return strcmp($this->getId(), $other->getId());
}
/**
* Casts the {@code Temporal} to {@code ChronoZonedDateTimeImpl} ensuring it bas the specified chronology.
*
* @param Chronology $chrono the chronology to check for, not null
* @param Temporal $temporal a date-time to cast, not null
* @return ChronoZonedDateTimeImpl the date-time checked and cast to {@code ChronoZonedDateTimeImpl}, not null
* @throws ClassCastException if the date-time cannot be cast to ChronoZonedDateTimeImpl
* or the chronology is not equal this Chronology
*/
static function ensureValid(Chronology $chrono, Temporal $temporal)
{
$other = $temporal;
// TODO cast
if ($chrono->equals($other->getChronology()) === false) {
throw new ClassCastException("Chronology mismatch, required: " . $chrono->getId() . ", actual: " . $other->getChronology()->getId());
}
return $other;
}