/**
  * @see Action::readParameters()
  */
 public function readParameters()
 {
     parent::readParameters();
     if (isset($_REQUEST['jurytalkID'])) {
         $this->jurytalkID = intval($_REQUEST['jurytalkID']);
     }
     $this->jurytalk = new ContestJurytalkEditor($this->jurytalkID);
     if (!$this->jurytalk->jurytalkID) {
         throw new IllegalLinkException();
     }
     if (!$this->jurytalk->isDeletable()) {
         throw new PermissionDeniedException();
     }
 }