public function GetList($pageNumber, $pageSize, $sortField = null, $sortDirection = null, $filter = null)
 {
     if (!$this->user->IsAdmin) {
         $scheduleAdminGroupIds = array();
         $resourceAdminGroupIds = array();
         $groups = $this->repo->LoadGroups($this->user->UserId, array(RoleLevel::SCHEDULE_ADMIN, RoleLevel::RESOURCE_ADMIN));
         foreach ($groups as $group) {
             if ($group->IsResourceAdmin) {
                 $resourceAdminGroupIds[] = $group->GroupId;
             }
             if ($group->IsScheduleAdmin) {
                 $scheduleAdminGroupIds[] = $group->GroupId;
             }
         }
         if ($filter == null) {
             $filter = new SqlFilterNull();
         }
         $additionalFilter = new SqlFilterIn(new SqlFilterColumn(TableNames::SCHEDULES_ALIAS, ColumnNames::SCHEDULE_ADMIN_GROUP_ID), $scheduleAdminGroupIds);
         $filter->_And($additionalFilter->_Or(new SqlFilterIn(new SqlFilterColumn(TableNames::RESOURCES_ALIAS, ColumnNames::RESOURCE_ADMIN_GROUP_ID), $resourceAdminGroupIds)));
     }
     return parent::GetList($pageNumber, $pageSize, $sortField, $sortDirection, $filter);
 }