/**
  * Get certificate/passed status for all given objects and users
  * 
  * Used in ilObjCourseAccess for ilObjCourseListGUI 
  * 
  * @param array $a_usr_ids
  * @param array $a_obj_ids 
  */
 static function _preloadListData($a_usr_ids, $a_obj_ids)
 {
     global $ilDB;
     if (!is_array($a_usr_ids)) {
         $a_usr_ids = array($a_usr_ids);
     }
     if (!is_array($a_obj_ids)) {
         $a_obj_ids = array($a_obj_ids);
     }
     foreach ($a_usr_ids as $usr_id) {
         foreach ($a_obj_ids as $obj_id) {
             self::$has_certificate[$usr_id][$obj_id] = false;
         }
     }
     include_once "Services/Certificate/classes/class.ilCertificate.php";
     if (ilCertificate::isActive()) {
         $obj_active = ilCertificate::areObjectsActive($a_obj_ids);
         include_once 'Modules/Course/classes/class.ilCourseParticipants.php';
         $data = ilCourseParticipants::getPassedUsersForObjects($a_obj_ids, $a_usr_ids);
         foreach ($data as $rec) {
             if ($obj_active[$rec["obj_id"]]) {
                 self::$has_certificate[$rec["usr_id"]][$rec["obj_id"]] = true;
             }
         }
     }
 }