This document outlines the structure and components of an elevator system using UML and Mermaid diagrams to visualize the relationships between different objects, enums, and components in the system.
- Number of Lifts: Define the number of lifts (n) in the building.
- Lift Dispatch Logic: Implement logic to dispatch the lift based on requests.
- Building: Represents the building that houses the elevator system.
- Floor: Represents a single floor in the building.
- ElevatorCar: Represents an individual elevator car, which includes properties like the current floor, status, and direction.
- Display: Shows the elevator's current status and direction.
- Door: Represents the door of an elevator, which can open and close based on the elevator's movement.
- ExternalButton: Placed on each floor to call the elevator.
- InternalButton: Placed inside the elevator for selecting floors.
Enums represent fixed sets of values related to elevator states and directions.
- Direction: Represents the movement direction of the elevator (either UP or DOWN).
- ElevatorStatus: Indicates the elevator's current status (e.g., STAND_BY, MOVING).
- DoorStatus: Represents the status of the door (either OPENED or CLOSED).
This UML diagram, rendered using PlantUML, represents the core components, their properties, and their relationships within the system.
@startuml
class Building {
- int noOfFloors;
- List<Floor> floors;
+ void addFloors(int additionalNoOfFloors)
+ public void removeFloor(Floor floor)
}
class Floor {
- int floorId;
- ExternalButton button;
}
class ElevatorCar {
- int carId;
- Display display;
- Floor currentFloor;
- Direction direction;
- ElevatorStatus status;
- InternalButton button;
- Door door;
+ void move()
}
class Display {
- int displayId;
- Floor floor;
- Direction direction;
}
class Door {
- int doorId;
- DoorStatus status;
+ void open();
+ void close();
}
enum Direction {
UP,
DOWN
}
enum DoorStatus {
OPENED,
CLOSED
}
enum ElevatorStatus {
STAND_BY,
MOVING
}
class Button {
- ButtonDispatcher buttonDispatcher;
}
class InternalButton
class ExternalButton
abstract class ButtonDispatcher {
- List<ElevatorController> elevatorControllerList;
+ abstract void submitRequest(Floor floor, Direction direction);
}
class InternalButtonDispatcher {
+ void submitRequest(Floor floor, Direction direction);
}
class ExternalButtonDispatcher {
+ void submitRequest(Floor floor, Direction direction);
}
class ElevatorController {
- int controllerId;
- ElevatorCar car;
+ void acceptNewRequest()
}
Building "1" *-- "*" Floor
Button <|-- InternalButton
Button <|-- ExternalButton
ElevatorCar "1" *-- "1" Display
ElevatorCar o-- Floor
ElevatorCar *-- Direction
ElevatorCar *-- ElevatorStatus
ElevatorCar "1" o-- "1" InternalButton
ElevatorCar "1" o-- "1" Door
Door o-- DoorStatus
Floor "1" o-- "1" ExternalButton
ButtonDispatcher <|-- InternalButtonDispatcher
ButtonDispatcher <|-- ExternalButtonDispatcher
Button "1" *-- "1" ButtonDispatcher
InternalButton "1" *-- "1" InternalButtonDispatcher
ExternalButton "1" *-- "1" ExternalButtonDispatcher
ButtonDispatcher "1" o-- "*" ElevatorController
ElevatorController "1" o--
6E75
"1" ElevatorCar
@endumlThe following class diagram represents the system's classes and their relationships, rendered using Mermaid.
classDiagram
class Building {
- int noOfFloors;
- List<Floor> floors;
+ void addFloors(int additionalNoOfFloors)
+ public void removeFloor(Floor floor)
}
class Floor {
- int floorId;
- ExternalButton button;
}
class ElevatorCar {
- int carId;
- Display display;
- Floor currentFloor;
- Direction direction;
- ElevatorStatus status;
- InternalButton button;
- Door door;
+ void move()
}
class Display {
- int displayId;
- Floor floor;
- Direction direction;
}
class Door {
- int doorId;
- DoorStatus status;
+ void open();
+ void close();
}
class Direction {
<<enumeration>>
UP
DOWN
}
class DoorStatus {
<<enumeration>>
OPENED,
CLOSED
}
class ElevatorStatus {
<<enumeration>>
STAND_BY,
MOVING
}
class Button {
- ButtonDispatcher buttonDispatcher;
}
class InternalButton
class ExternalButton
class ButtonDispatcher {
<<abstract>>
- List<ElevatorController> elevatorControllerList;
+ abstract void submitRequest(Floor floor, Direction direction);
}
class InternalButtonDispatcher {
+ void submitRequest(Floor floor, Direction direction);
}
class ExternalButtonDispatcher {
+ void submitRequest(Floor floor, Direction direction);
}
class ElevatorController {
- int controllerId;
- ElevatorCar car;
+ void acceptNewRequest()
}
Building "1" *-- "*" Floor
Button <|-- InternalButton
Button <|-- ExternalButton
ElevatorCar "1" *-- "1" Display
ElevatorCar o-- Floor
ElevatorCar *-- Direction
ElevatorCar *-- ElevatorStatus
ElevatorCar "1" o-- "1" InternalButton
ElevatorCar "1" o-- "1" Door
Door o-- DoorStatus
Floor "1" o-- "1" ExternalButton
ButtonDispatcher <|-- InternalButtonDispatcher
ButtonDispatcher <|-- ExternalButtonDispatcher
Button "1" *-- "1" ButtonDispatcher
InternalButton "1" *-- "1" InternalButtonDispatcher
ExternalButton "1" *-- "1" ExternalButtonDispatcher
ButtonDispatcher "1" o-- "*" ElevatorController
ElevatorController "1" o-- "1" ElevatorCar