hotelmanagementsystem

Hotel Management System (LLD)

Problem Statement

Design and implement a Hotel Management System that manages hotel rooms, reservations, and guest information. The system should handle room bookings, check-ins, check-outs, and maintain room status.

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Requirements

1. Room Management:

   • Track different types of rooms (STANDARD, DELUXE, SUITE)
   • Manage room availability and status
   • Handle room pricing and features

2. Reservation Management:

   • Create and manage reservations
   • Handle check-in and check-out processes
   • Track reservation status (CONFIRMED, CANCELLED, CHECKED_IN, CHECKED_OUT)

3. Guest Management:

   • Store guest information
   • Track guest history
   • Handle guest preferences

4. Room Status Tracking:

   • Monitor room availability (AVAILABLE, OCCUPIED, MAINTENANCE)
   • Update room status based on reservations
   • Handle room maintenance requests

5. Payment Integration:

   • Process room payments
   • Handle different payment methods
   • Generate invoices

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Core Entities

1. HotelManagementSystem

• Fields: List rooms, List reservations, List guests
• Methods:
  • addRoom()
  • makeReservation()
  • checkIn()
  • checkOut()
  • getAvailableRooms()
  • cancelReservation()

2. Room

• Fields: String roomNumber, RoomType type, double price, RoomStatus status
• Methods:
  • isAvailable()
  • updateStatus()
  • getPrice()

3. Guest

• Fields: String id, String name, String email, String phoneNumber
• Methods:
  • updateProfile()
  • getReservations()

4. Reservation

• Fields: String id, Guest guest, Room room, Date checkInDate, Date checkOutDate, ReservationStatus status
• Methods:
  • confirm()
  • cancel()
  • checkIn()
  • checkOut()

5. RoomType (Enum)

• Values: STANDARD, DELUXE, SUITE

6. RoomStatus (Enum)

• Values: AVAILABLE, OCCUPIED, MAINTENANCE

7. ReservationStatus (Enum)

• Values: CONFIRMED, CANCELLED, CHECKED_IN, CHECKED_OUT

UML Class Diagram

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Example Usage

HotelManagementSystem system = new HotelManagementSystem();

// Add a room
Room room = system.addRoom("101", RoomType.DELUXE, 150.0);

// Create a guest
Guest guest = new Guest("John Doe", "john@example.com", "1234567890");

// Make a reservation
Reservation reservation = system.makeReservation(guest, room, checkInDate, checkOutDate);

// Check in
system.checkIn(reservation);

// Check out
system.checkOut(reservation);

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Demo

See HotelManagementSystemDemo.java for a sample usage and simulation of the hotel management system.

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Extending the Framework

• Add room service: Track room service requests and delivery
• Add housekeeping: Manage housekeeping schedules and tasks
• Add loyalty program: Implement guest loyalty points and rewards
• Add inventory management: Track hotel supplies and amenities
• Add reporting system: Generate occupancy and revenue reports
• Add notification system: Send booking confirmations and reminders

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Design Patterns Used

• Singleton Pattern: For the hotel management system instance
• Factory Pattern: For creating different types of rooms
• Observer Pattern: For room status updates and notifications
• Strategy Pattern: For different pricing strategies

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Exception Handling

• RoomNotAvailableException: Thrown when trying to book an unavailable room
• InvalidReservationException: Thrown when reservation details are invalid
• CheckInException: Thrown when check-in process fails
• CheckOutException: Thrown when check-out process fails

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