AV4 Bank

package AV4;

public abstract class Account {
    private String accountOwner;
    private int id; //se odnesuva na momentalna smetka
    private static int idSeed = 10000;
    private double currentAmount;
    private AccountType accountType;

    public Account(String accountOwner, double currentAmount) {
        this.accountOwner = accountOwner;
        this.currentAmount = currentAmount;
        this.id = idSeed++;

    }

    public double getCurrentAmount() {
        return currentAmount;
    }

    public void addAmount(double amount) {
        this.currentAmount += amount;
    }

    public void withdrawAmount(double amount) throws CannotWithdrawMoneyException {
        if (currentAmount <= amount) {
            throw new CannotWithdrawMoneyException(currentAmount, amount);
        }
        this.currentAmount -= amount;

    }

    public abstract AccountType accountType();

    @Override
    public String toString() {
        return String.format("%d: %.2f", id, currentAmount);
    }
}
package AV4;

public enum AccountType {
    INTEREST,
    NON_INTEREST
}

package AV4;

import java.util.Arrays;

public class Bank {
    private Account[] accounts;
    private int totalAccounts;
    private int maxAccounts;

    public Bank(int maxAccounts) {
        this.maxAccounts = maxAccounts;
        this.accounts = new Account[maxAccounts];
        this.totalAccounts = 0;
    }

    public void addAccount(Account account) {
        if (totalAccounts == maxAccounts) {
            accounts = Arrays.copyOf(accounts, maxAccounts * 2);
            maxAccounts *= 2;
        }
        accounts[totalAccounts++] = account;
    }

    public double totalAssets() {
        double total = 0;
        for (Account account : accounts) {
            total += account.getCurrentAmount();
        }
        return total;
    }

    public void addInterestToAllAccounts() {
        for (Account account : accounts) {
            if(account.accountType().equals(AccountType.INTEREST))
            {
                InterestBearingAccount interestBearingAccount=(InterestBearingAccount) account;
                interestBearingAccount.addInterest();
            }
        }
    }
}
package AV4;

public class CannotWithdrawMoneyException extends Exception {
    public CannotWithdrawMoneyException(double currentAmount, double amount) {
        super(String.format("Your current amount is : %.2f, and you can not withdraw this amount %.2f",
                currentAmount, amount));
    }
}
package AV4;

public class InteresrCheckingAccount extends Account implements InterestBearingAccount {
    public static final double INTEREST_RATE=0.03;
    public InteresrCheckingAccount(String accountOwner, double currentAmount) {
        super(accountOwner, currentAmount);
    }

    @Override
    public AccountType accountType() {
        return AccountType.INTEREST;
    }

    @Override
    public void addInterest() {
        addAmount(getCurrentAmount() * INTEREST_RATE);
    }
}
package AV4;

public interface InterestBearingAccount {
    void addInterest();
}
package AV4;

public class NonInterestCheckingAccount extends Account{
    public NonInterestCheckingAccount(String accountOwner, double currentAmount) {
        super(accountOwner, currentAmount);
    }

    @Override
    public AccountType accountType() {
        return AccountType.NON_INTEREST;
    }
}
package AV4;

public class PlatinumCheckingAccount extends InteresrCheckingAccount{
    public PlatinumCheckingAccount(String accountOwner, double currentAmount) {
        super(accountOwner, currentAmount);
    }

    @Override
    public void addInterest() {
        addAmount(getCurrentAmount() * INTEREST_RATE *2);
    }
}