Big picture. Persistence

Слайд 2

Domain objects

User
CreditCard
Transaction

Domain objects User CreditCard Transaction

Слайд 3

User

String username;
Collection creditCards;

User String username; Collection creditCards;

Слайд 4

CreditCard

String password;
User user;
Collection fromTransaction;
Collection toTransaction;
BigDecimal balance;

CreditCard String password; User user; Collection fromTransaction; Collection toTransaction; BigDecimal balance;