/**
* 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 $formatter;
}
public function test_getLocalizedLocaleNPE()
{
TestHelper::assertNullException($this, function () {
DateTimeFormatterBuilder::getLocalizedDateTimePattern(FormatStyle::SHORT(), FormatStyle::SHORT(), IsoChronology::INSTANCE(), null);
});
}
