/**
  * User downloads (own) submitted files
  *
  * @param
  * @return
  */
 function download()
 {
     global $ilUser, $ilCtrl;
     $this->checkPermission("read");
     if (count($_REQUEST["delivered"])) {
         if (!is_array($_REQUEST["delivered"])) {
             $_REQUEST["delivered"] = array($_REQUEST["delivered"]);
         }
         ilEphAssignment::downloadSelectedFiles($this->object->getId(), (int) $_GET["ass_id"], $ilUser->getId(), $_REQUEST["delivered"]);
         exit;
     } else {
         ilUtil::sendFailure($this->lng->txt("please_select_a_delivered_file_to_download"), true);
         $ilCtrl->redirect($this, "submissionScreen");
     }
 }