Requirements

Determine the different ways the system will be used. This includes main functions the system needs to perform and who will use it.





Based on the requirements to manage vehicle parking across multiple floors with different functionalities, here are the main objects within the system:

ParkingLot

  • Attributes: List of ParkingFloors, Address, Name.
  • Methods: FindAvailableSpot(Vehicle vehicle), CalculateFee(Vehicle vehicle).

ParkingFloor

  • Attributes: List of ParkingSpots, FloorNumber.
  • Methods: FindAvailableSpot(Vehicle vehicle), AddParkingSpot(ParkingSpot spot).

ParkingSpot

  • Attributes: SpotNumber, Size (enum: Small, Medium, Large), IsOccupied.
  • Methods: AssignVehicle(Vehicle vehicle), RemoveVehicle().

Vehicle

  • Attributes: VehicleID, Size (enum: Small, Medium, Large).
  • Methods: -- (Primarily used for data storage).

Ticket

  • Attributes: TicketID, VehicleID, StartTime, EndTime, IssuedAt.
  • Methods: CalculateDuration(), CalculateCharge().





The relationships between the core objects can be summarized as follows:

  • ParkingLot contains multiple ParkingFloors.
  • Each ParkingFloor consists of several ParkingSpots.
  • ParkingSpot can accommodate one Vehicle at a time.
  • Ticket is associated with each Vehicle that parks, to track time and calculate fees.






To promote code reuse and polymorphism, consider the following class hierarchy:

User Hierarchy:

  • The User class can serve as a base class, with specific roles such as Admin, Manager, and Worker inheriting from it.
    • Attributes: userID, username, password.
    • Subclasses: Admin, Manager, Worker

Vehicle Hierarchy:

  • The Vehicle class can serve as a base class for different types of vehicles like cars, motorcycles, and trucks.
    • Attributes: vehicleID, size.
    • Subclasses: Car, Motorcycle, Truck






Implement these design patterns to streamline operations and maintain flexibility:

Factory Pattern:

  • Use a ParkingSpotFactory to create spots suitable for different sizes of vehicles.

Singleton Pattern:

  • ParkingLotManager could be implemented as a Singleton to ensure only one instance manages all parking operations.

Strategy Pattern:

  • Implement different fee calculation strategies using the Strategy pattern, allowing easy adjustments for various fee structures.





public class ParkingSpot {

private String spotNumber;

private Vehicle.Size size; // Enum for Size

private boolean isOccupied;

public ParkingSpot(String spotNumber, Vehicle.Size size) {

this.spotNumber = spotNumber;

this.size = size;

this.isOccupied = false;

}

public boolean assignVehicle(Vehicle vehicle) {

if (vehicle.getSize() == this.size && !isOccupied) {

this.isOccupied = true;

return true;

}

return false;

}

public void removeVehicle() {

this.isOccupied = false;

}

}





Ensure that each class adheres to the SOLID principles for OOP design:

  • Single Responsibility Principle: Each class has a single responsibility, e.g., ParkingSpot only manages parking spot details.
  • Open/Closed Principle: The system should be open for extension but closed for modification, achieved through the use of interfaces and abstract classes.
  • Liskov Substitution Principle: Subclasses should be substitutable for their base classes.
  • Interface Segregation Principle: Use specific interfaces for specific purposes, avoiding large, unwieldy interfaces.
  • Dependency Inversion Principle: High-level modules should not depend on low-level modules. Both should depend on abstractions.





Consider implementing an event-driven architecture or microservices to handle different aspects of the parking lot system, such as payment processing and spot management, to ensure the system can scale and adapt as requirements grow or change.





Explanation of the Diagram:

  • ParkingLot has multiple ParkingFloors.
  • Each ParkingFloor contains multiple ParkingSpots.
  • ParkingSpots are assigned to Vehicles.
  • Tickets are associated with Vehicles for tracking parking times and fees.
  • Users manage the ParkingLot and are linked to administrative functionalities.



Predictive Analytics for Demand Forecasting

  • Description: Use historical data to predict peak times and demand patterns. This helps in dynamic pricing and better allocation of resources.
  • Benefit: Optimizes revenue management and improves customer satisfaction by reducing wait times during peak hours.

2. Advanced Reporting and Dashboards

  • Description: Implement a comprehensive dashboard that provides real-time insights into occupancy levels, revenue, and other operational metrics.
  • Benefit: Empowers management with data to make informed decisions and quickly identify issues like underutilized spaces or operational bottlenecks.

3. Integration with Mobile Apps

  • Description: Develop a mobile app that allows customers to check space availability, make reservations, and pay online.
  • Benefit: Enhances user experience by providing convenience and reducing the time spent searching for a spot.

4. Electric Vehicle Charging Stations

  • Description: Equip parking spots with electric vehicle (EV) charging stations, and manage them through the system.
  • Benefit: Attracts a growing segment of EV owners and provides an additional revenue stream.

5. License Plate Recognition (LPR)

  • Description: Implement LPR technology to automate vehicle entry and exit, thus speeding up the parking process and reducing manpower costs.
  • Benefit: Increases security, reduces potential human error, and improves traffic flow within the lot.

6. Robotics for Vehicle Relocation

  • Description: Use robotic systems to automatically park and retrieve vehicles in designated spots.
  • Benefit: Maximizes space utilization and reduces the risk of damage, as vehicles are handled by automated systems.

7. API Integration with Other Services

  • Description: Open APIs to integrate with city transport systems, event venues, or navigation services to provide holistic services.
  • Benefit: Creates a seamless transportation experience, potentially increasing customer retention and partnership opportunities.

8. Dynamic and Flexible Pricing Models

  • Description: Implement pricing models that adjust based on demand, duration of stay, and special events.
  • Benefit: Maximizes profitability during high-demand periods and offers competitive pricing during off-peak times.