/**
  * @service banner write
  * @param Gpf_Rpc_Params $params
  */
 public function load(Gpf_Rpc_Params $params) {
     $form = new Gpf_Rpc_Form($params);
     $banner = new Pap_Db_BannerInRotator();
     $banner->setId($form->getFieldValue("Id"));
     $banner->load();
     $form->setField("valid_from",$banner->getValidFrom());
     $form->setField("valid_until",$banner->getValidUntil());
     $form->setField("rank",$banner->getRank());
     $form->setField("rotatedbannerid",$banner->getRotatedBannerId());
     return $form;
 }