CDI-28

CDI-28

public interface Account {

    public void withdraw(int amount);

    public void deposit(int amount);
    
    public int getBalance();
}

public class BankAccount implements Account {

    int balance = 0;

    @Override
    public void withdraw(int amount) {
        balance -= amount;
    }

    @Override
    public void deposit(int amount) {
        balance += amount;
    }

    public int getBalance() {
        return balance;
    }
}

@Decorator
public abstract class ChargeDecorator implements Account {

    private static final int WITHDRAVAL_CHARGE = 5;

    public static int charged = 0;

    @Inject
    @Delegate
    private Account account;

    @Override
    public void withdraw(int amount) {
        account.withdraw(amount + WITHDRAVAL_CHARGE);
        charged += WITHDRAVAL_CHARGE;
    }

    @Override
    public abstract void deposit(int amount);

    public static void reset() {
        charged = 0;
    }
}