Elevator Low Level Design

Concrete Classes

1. Building
2. Floor
3. Display
4. ElevatorCar
5. InternalButtons
6. ElevatorController
7. ExternalDispatcher
8. InternalDispatcher
9. ElevatorCreator - contains hardcoded data
10. Util - contains utility functions

Enum Classes

1. Direction
2. Status

Explanation

1. InternalDispatcher gets triggered by InternalButtons in ElevatorCar.

2. ExternalDispatcher gets triggered by Floor pressButton() function

3. Elevator class contains a move() function which is triggered by dispatcher, and it runs a for-loop until it reaches the destination floor.

Future Enhancement

ElevatorController must implement min. seek time algorithm to effectively co-ordinate with the two elevators.