private function getStorage($key)
{
if (!self::$data_storages) {
self::$data_storages = array('tags' => true, 'features_selectable' => 'shopProductFeaturesSelectableModel', 'skus' => true, 'features' => true, 'params' => true, 'categories' => 'shopCategoryProductsModel');
}
if (isset(self::$data_storages[$key])) {
$storage = self::$data_storages[$key];
if ($storage === true) {
$storage = "shopProduct" . ucfirst($key) . "Model";
$obj = new $storage();
if (!$obj instanceof shopProductStorageInterface) {
throw new waException($storage . ' must implement shopProductStorageInterface');
}
return self::$data_storages[$key] = $obj;
} elseif (is_string($storage)) {
return self::$data_storages[$key] = new $storage();
} elseif (is_object(self::$data_storages[$key])) {
return self::$data_storages[$key];
}
}
return null;
}
