/**
* Get selected database delegation class
*
* @return string delegation class name
*/
private static function getDelegationClass()
{
if (is_null(self::$class)) {
$type = Config::get('db_type');
if (!$type) {
throw new ConfigBadParameterException('db_type');
}
$class = 'Database' . ucfirst($type);
$file = NOTES_BASE . '/classes/utils/' . $class . '.class.php';
if (!file_exists($file)) {
throw new CoreFileNotFoundException($file);
}
self::$class = $class;
}
return self::$class;
}
