function setPayPeriodSchedule($id)
 {
     $id = trim($id);
     $ppslf = new PayPeriodScheduleListFactory();
     if ($id != 0 or $this->Validator->isResultSetWithRows('pay_period_schedule', $ppslf->getByID($id), TTi18n::gettext('Pay Period Schedule is invalid'))) {
         $this->data['pay_period_schedule_id'] = $id;
         return TRUE;
     }
     return FALSE;
 }