public void serveRequest(AbstractBusinessLogicHandler.InputWrapper inWrapper, AbstractBusinessLogicHandler.OutputWrapper outWrapper, AbstractBusinessLogicHandler.ValidateInputResult vir) throws ApplicationException
   {
      try
      {
         InputWrapper  inputWrapper  = (InputWrapper)  inWrapper;
         OutputWrapper outputWrapper = (OutputWrapper) outWrapper;

         DateTime startDate = (DateTime) date.clone();
         DateTimeUtils.setTimeToStartOfDay(startDate);

         DateTime endDate = (DateTime) date.clone();
         DateTimeUtils.setTimeToEndOfDay(endDate);

         VoucherDAO voucherDAO = getDAO(VoucherDAO.class);
         VoucherQBEEntity voucherQBE = new VoucherQBEEntity();
//????????????????????????????????????????????????????????????????????????????????????????????????????????????
         Voucher voucher = voucherQBE.fieldCreateDate().setBetween(startDate, endDate);

         LinkedList<Voucher> voucherList = voucherDAO.queryByExample(voucher);
//????????????????????????????????????????????????????????????????????????????????????????????????????????????
         ///////////////////////////////////////////////////
         // extract unique deal ids from list of vouchers //
         ///////////////////////////////////////////////////
         Set<Integer> uniqueDealIds = new Set<Integer>();
         for(Voucher voucher : voucherList)
         {
            uniqueDealIds.add(voucher.getDealId());
         }

      }
      catch(Exception e)
      {
         throw(new ApplicationException("Error in BLH.", e));
      }
   }