Questions for Java preparation — Page 94

Read the code and highlight errors. /** * A client with a purchased ticket can choose a specific seat for an additional fee. * The base price of seats is determined by tariffs (external service). * For clients with certain tariffs (PREMIUM, ULTRA), a discount is applied at payment. * When booking, an invoice is issued to the client for payment. Payment management is handled by a third-party service. */ @Service public class SeatBookingService { @Autowired private SeatBookingRepository seatBookingRepository; @Autowired private TicketRepository ticketRepository; @Autowired private TariffClient tariffClient; @Autowired private CustomerClient customerClient; @Autowired private PaymentClient paymentClient; /** * Booking. * @param seatCode seat code (e.g., 19A) * @param ticketId ticket ID */ @Transactional public void bookSeat(String seatCode, UUID ticketId) { var ticket = ticketRepository.findById(ticketId); //book var seatBooking = new SeatBooking(seatCode, ticket.get().getFlightId(), ticketId, BookingStatus.BOOKED); seatBookingRepository.save(seatBooking); //find base tariff for the selected seat on the plane var basePrice = tariffClient.getBasePrice(ticket.get().getPlaneModel(), seatCode); //find customer data Long userId = (Long) SecurityContextHolder.getContext().getAuthentication().getPrincipal(); var userData = customerClient.getCustomer(userId); System.out.println("User found " + userData.getFio() + " document number " + userData.getDocument()); var price = basePrice; if (userData.getTariff() == "PREMIUM") { //50% discount price = basePrice * 0.5d; } if (userData.getTariff() == "ULTRA") { //20% discount price = basePrice * 0.8d; } var invoice = new Invoice(price, ticketId, userId); //issue invoice paymentClient.sendInvoice(invoice); System.out.println("Invoice issued"); } @Data @Table("seat_booking") public class SeatBooking { @Column private String seatCode; @Column private UUID flightId; @Column private UUID ticketId; @Column private BookingStatus status; } public enum BookingStatus { BOOKED, PAID; }

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