/**
* @param mixed $metadataCache Either a Cache object, or a string naming a Registry key
* @return \libDb\Registry
* @throws Exception
*/
protected static function _setupMetadataCache($metadataCache)
{
if ($metadataCache === null) {
return null;
}
if (is_string($metadataCache)) {
$metadataCache = \libDb\Registry::get($metadataCache);
}
if (!$metadataCache instanceof \libDb\Registry) {
throw new Exception('Argument must be of type Registry ');
}
return $metadataCache;
}
