public void refundTicket(Ticket ticket, final double refundAmount) throws Exception {
    User currentUser = Application.getCurrentUser();
    Terminal terminal = ticket.getTerminal();

    Session session = null;
    Transaction tx = null;

    GenericDAO dao = new GenericDAO();

    try {
      Double currentBalance = terminal.getCurrentBalance();
      Double totalPrice = ticket.getTotalAmount();
      double newBalance = currentBalance - totalPrice;
      terminal.setCurrentBalance(newBalance);

      //			double refundAmount = ticket.getPaidAmount();
      //			if(ticket.getGratuity() != null) {
      //				refundAmount -= ticket.getGratuity().getAmount();
      //			}

      RefundTransaction posTransaction = new RefundTransaction();
      posTransaction.setTicket(ticket);
      posTransaction.setPaymentType(PaymentType.CASH.name());
      posTransaction.setTransactionType(TransactionType.DEBIT.name());
      posTransaction.setAmount(refundAmount);
      posTransaction.setTerminal(terminal);
      posTransaction.setUser(currentUser);
      posTransaction.setTransactionTime(new Date());

      ticket.setVoided(false);
      ticket.setRefunded(true);
      ticket.setClosed(true);
      ticket.setDrawerResetted(false);
      ticket.setClosingDate(new Date());

      ticket.addTotransactions(posTransaction);

      session = dao.getSession();
      tx = session.beginTransaction();

      dao.saveOrUpdate(ticket, session);

      tx.commit();

      // String title = "- REFUND RECEIPT -";
      // String data = "Ticket #" + ticket.getId() + ", amount " + refundAmount + " was refunded.";

      ReceiptPrintService.printRefundTicket(ticket, posTransaction);

    } catch (Exception e) {
      try {
        tx.rollback();
      } catch (Exception x) {
      }

      throw e;
    } finally {
      dao.closeSession(session);
    }
  }
  public void voidTicket(Ticket ticket) throws Exception {
    Session session = null;
    Transaction tx = null;

    try {
      session = createNewSession();
      tx = session.beginTransaction();

      Terminal terminal = Application.getInstance().getTerminal();

      ticket.setVoided(true);
      ticket.setClosed(true);
      ticket.setClosingDate(new Date());
      ticket.setTerminal(terminal);

      if (ticket.isPaid()) {
        VoidTransaction transaction = new VoidTransaction();
        transaction.setTicket(ticket);
        transaction.setTerminal(terminal);
        transaction.setTransactionTime(new Date());
        transaction.setTransactionType(TransactionType.DEBIT.name());
        transaction.setPaymentType(PaymentType.CASH.name());
        transaction.setAmount(ticket.getPaidAmount());
        transaction.setTerminal(Application.getInstance().getTerminal());
        transaction.setCaptured(true);

        PosTransactionService.adjustTerminalBalance(transaction);

        ticket.addTotransactions(transaction);
      }

      session.update(ticket);
      session.update(terminal);

      session.flush();
      tx.commit();
    } catch (Exception x) {
      try {
        tx.rollback();
      } catch (Exception e) {
      }
      throw x;
    } finally {
      closeSession(session);
    }
  }