public function listAction()
 {
     $this->indexAction();
     $year = trim($this->_getParam('year'));
     if (preg_match('/^\\d{4}$/', $year) > 0) {
         $f = new Opus_DocumentFinder();
         $f->setServerState('published');
         $f->setServerDatePublishedRange($year, $year + 1);
         $this->view->ids = $f->ids();
     }
     return $this->render('index');
 }