/**
* 构造函数
*
* @return Db_Orm
*/
public static function getOrm()
{
$class = get_called_class();
if (defined($class . '::WHERE_CACHE')) {
$bWhereCache = $class::WHERE_CACHE;
}
return Util_Common::getOrm($class::DB_NAME, $class::TABLE_NAME, $bWhereCache);
}