/**
* Parses the key turning it into a string (or array is required) suitable to be passed to the cache store.
*
* @param string|int $key As passed to get|set|delete etc.
* @return string|array String unless the store supports multi-identifiers in which case an array if returned.
*/
protected function parse_key($key)
{
// First up if the store supports multiple keys we'll go with that.
if ($this->store->supports_multiple_identifiers()) {
$result = $this->definition->generate_multi_key_parts();
$result['key'] = $key;
return $result;
}
// If not we need to generate a hash and to for that we use the cache_helper.
return cache_helper::hash_key($key, $this->definition);
}
