The scenario
Designing a class model for an airline reservation system, capturing passengers, flights, bookings, seats, tickets, and payment processing.
What is in this drawing
Read the decisions behind it.
01
Inheritance for payment methods with abstract Payment and concrete CreditCardPayment
02
Composition between Flight and Seat to model seat allocation
03
Enumeration BookingStatus to enforce valid booking states
When modeling domain entities for airline, travel agency, or ticketing software systems.
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