/**
* This method storages an element in the registry under the passed key.
*
* @param string $variable The variable (class, object) to store
* @param string $identifier The identifier for the stored object, class ...
* If not passed a UUID is calculated and returned
*
* @author Benjamin Carl <*****@*****.**>
*
* @return string The identifier for reading the stored variable
*/
public function set(&$variable, $identifier = null)
{
// Generate identifier if not passed
if (null === $identifier) {
$identifier = sha1(serialize($variable));
}
// store the variable as reference
self::$references[] = $variable;
$index = count(self::$references) - 1;
self::$lookup[$identifier] = $index;
self::$reverseLookup[$index] = $identifier;
// store count of elements
self::$count = $index + 1;
// return identifier for outer use
return $identifier;
}
