[Symfony2] Extract the current namespace, bundle, controller and action name

$matches    = array();
$controller = $this->getRequest()->attributes->get('_controller');
preg_match('/(.*)\\\Bundle\\\(.*)\\\Controller\\\(.*)Controller::(.*)Action/', $controller, $matches);
 
$request = $this->getRequest();
$request->attributes->set('namespace',  $matches[1]);
$request->attributes->set('bundle',     $matches[2]);
$request->attributes->set('controller', $matches[3]);
$request->attributes->set('action',     $matches[4]);