/**
  * Save employee leave brought forward for given period
  * @param int $employeeId
  * @param int $leaveTypeId
  * @param int $leavePeriodId
  * @param float $broughtForwardLeaveLength
  * @return boolean
  */
 public function saveEmployeeLeaveBroughtForward($employeeId, $leaveTypeId, $leavePeriodId, $broughtForwardLeaveLength)
 {
     try {
         $leaveEntitlement = $this->readEmployeeLeaveEntitlement($employeeId, $leaveTypeId, $leavePeriodId);
         if (!$leaveEntitlement instanceof EmployeeLeaveEntitlement) {
             $leaveEntitlement = new EmployeeLeaveEntitlement();
             $leaveEntitlement->setLeaveTypeId($leaveTypeId);
             $leaveEntitlement->setLeavePeriodId($leavePeriodId);
             $leaveEntitlement->setEmployeeId($employeeId);
             $leaveEntitlement->setNoOfDaysAllotted(0);
         }
         $leaveEntitlement->setLeaveBroughtForward($broughtForwardLeaveLength);
         $leaveEntitlement->save();
         return true;
     } catch (Exception $e) {
         throw new DaoException($e->getMessage());
     }
 }