private static function getImpl() {
if(is_null(self::$impl)) {
$pkg = Package::getPackageByName('i18n');
$implName = $pkg->getProperty('provider');
try {
$rc = new ReflectionClass($implName);
self::$impl = $rc->newInstance();
} catch(ReflectionException $re) {
throw new ConfigurationException('i18n', 'provider', ($implName ? 'Cannot instantiate i18n provider ' . $$implName : 'i18n provider not set (provider option empty in i18n/.config)'));
}
}
return self::$impl;
}