week4-crc-session.md

CRC Cards

• Train

  • R
    • Has an identifier.
    • Knows its carts.
    • Knows its physical location (I owe you an argument for this shouldn't be the responsibility of this class)
  • C
    • Cart

• Cart

  • R
    • Knows its seats, and their layout.
    • Physical Services
    • Knows which seats are taken.

• TrainCompany

  • R
    • Knows its name, and routes
    • Can access routes given from and/or to station(s).
    • Can update the price of a route.
    • Can delete a route.
  • C
    • DirectRoute

• DirectRoute

  • R
    • Train copmany
    • Train
    • From and to station
    • Departure/Arrival time.
    • Price.
  • C
    • TrainCompany
    • Train

As a train company manager, I want to specify arrival/departure times.

• Create a DirectRoute with an arrival and departure time.

As a train company manager, I want to list services that are available in each cart.

• From a DirectRoute, we can get the Train.
• From the Train, we can get all the Carts.
• Each Cart knows its physical services.

As a train company manager, I want to specify which seats are available in each cart of a scheduled trip.

• From a DirectRoute, we can get the Train.
• From the Train, we can get all the Carts.
• Each Cart knows which seats are taken.

As a train company manager, I want to offer different prices during different times.

• Specify the price of a DirectRoute.

As a train company manager, I want to offer different prices for different carts.

• We're a little stuck, but we can make things better by defining the following interface
  • PriceCalculator, Interface
    • R
      • Copmute the price of an avialable seat
      • Knows the direct route it's associated with.
    • C
      • DirectRoute
      • Train
      • Cart