Breaking News: Grepper is joining You.com. Read the official announcement!

spring boot service

Innocent Iguana answered on February 8, 2024 Popularity 9/10 Helpfulness 3/10

answer spring boot service

spring boot service

Comment

// NOTE: Always use a model to design your service
// Service Interface
public interface RoomReservationService {
    List<RoomReservation> getReservationsByDate(Date reservationDate);
}

// Service class Implementation
@Service
public class RoomReservationServiceImpl implements RoomReservationService {
    @Autowired
    private ReservationRepository reservationRepository;
    @Autowired
    private RoomRepository roomRepository;
    @Autowired
    private GuestRepository guestRepository;

    @Override
	public List<RoomReservation> getReservationsByDate(Date reservationDate) {
    List<RoomReservation> roomReservations = new ArrayList<>();
      // This "Reservation" is an Entity that represents the intermediate table which connects other tables
    List<Reservation> reservations = reservationRepository.findAllByReservationDate(reservationDate);
    List<Guest> guests = guestRepository.findAll(); // Fetch all data from Guest table
    List<Room> rooms = roomRepository.findAll(); // Fetch all data from Room table
    for (Reservation reservation : reservations) {
        Long roomId = reservation.getRoomId();
		Room room = roomRepository.findById(roomId).orElse(null); // Filter information from Room entity / table
        Long guestId = reservation.getGuestId();
        Guest guest = guestRepository.findById(guestId).orElse(null); // Filter information from Guest entity / table
        
        if (room != null && guest != null) {
            RoomReservation roomReservation = new RoomReservation(); // Start working with model
            roomReservation.setReservationId(reservation.getReservationId());
            roomReservation.setRoomNumber(room.getRoomNumber());
            roomReservation.setGuestName(guest.getGuestName());
            roomReservation.setReservationDate(reservation.getReservationDate());
            
            roomReservations.add(roomReservation);
        }
    }
    
    return roomReservations;
    }
}

Popularity 9/10 Helpfulness 3/10 Language java

Source: Grepper

Tags: java service spring-boot

Link to this answer
Share Copy Link

Contributed on Feb 08 2024

Innocent Iguana

0 Answers Avg Quality 2/10

spring boot service

Contents

More Related Answers

spring boot service

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.