Parking lot

Questions & Requirements

• Who? what kind of car, what kind of parking lot/building
• What? parking, finding parking spot
• Where? parking lot
• When? Move in date, Move out date
• How? How to park(how to find empty parking spot), payment function
• Why? None

For example:

• N levels, each level has M rows of spots and each row has K spots. So each level has M*K spots
• the parking lot can park motorcycles, cars and buses
• The parking lot has motorcycle spots, compact spots, and large spots
• Each row,
  • motorcycle spots ID is in range [0, K/4)
  • compact spots ID is in range [K/4, K/4*3)
  • large spot ID is in range [K/4*3, K)
• A motorcycle can park in any spot
• A car park in single compact spot or large spot
• A bus can park in htree large spots that are consecutive and within same row. it cannot park in small spots

Define Class (Properties, State)

• Location
  • Parking spot
    • ID, Spot Size,
    • Available
  • Level
    • ID, Rows number, each Rows' spots number
    • Available spots number
  • Parking lot/building
    • ID
• Vehicle (base class)
  • ID, Size
• • Motorcycle
  • Car
  • Bus

Define Class(Relationship)

• Location
  • Parking Spot
    • Row number, Level number
  • Level
    • parking spot list
  • Parking lot/building
    • Level list
    • Dictionary<Vehicle, Parking Spot>
    • Dictionary<Parking Spot, Vehicle>

Define Class (Behavror)

• Parking Spot
  • Park vehicle/Leave spot
  • isAble to park
• Level
  • Leave/Park in Spots
  • Find Available Spots
• Parking Lot
  • Leave/Park in Spots
  • Find Available Spots
• Vehicle
  • Move in Spot
  • Move out Spot

Design Elevator

Question & Requirements

• What? Building management system?

Define Class (Object)

• Elevator
• User/Passager
• Building Management(Singleton)
• Message/Event

Define Class (properties, state)

• Elevator
  • ID
  • Elevator Info
  • Status, running/stop/emergency
  • Door Status, open/lock/working/emergency
  • Current Floor
• Elevator Info
  • Elevator size
  • Max Weight
• User
  • ID
• Message
  • Status
  • Elevator id
  • Target Floor
  • Time/Date -> Time out declare emergency
  • Operation

Define Class(Relationship)

• Building Management(Singleton)
  • Elevator set
  • Message Queue

Define Class (Behavior)

• Elevator
  • Move up, Move down
  • Open door, Close door
  • Get Status
  • Get Current Floor
  • Stop
  • Enter Emergency
• User
  • Call Elevator Up
  • Call Elevator Down
  • Get Current Floor
  • Go to Floor
  • Open Door
  • Close Door
  • Declare Emergency
• Message
  • Operations: Move Up, Move, Down, Open Door, Close Door
• Building Management
  • Get Message
  • PerformMessageOnElevator