public Transfer MakeTransfer(string counterAccount, Money amount) {
// 1. Check withdrawal limit:
if (amount.GreaterThan(this.transferLimit)) {
throw new BusinessException("Limit exceeded!");
}
if (Accounts.IsValid(counterAccount)) { // <1>
// 2. Look up counter account and make transfer object:
CheckingAccount acct = Accounts.FindAcctByNumber(counterAccount);
Transfer result = new Transfer(this, acct, amount); // <2>
return result;
} else {
throw new BusinessException("Invalid account number!");
}
}
public Transfer MakeTransfer(String counterAccount, Money amount) {
// 1. Check withdrawal limit:
if (amount.GreaterThan(this.transferLimit)) {
throw new BusinessException("Limit exceeded!");
}
// 2. Assuming result is 9-digit bank account number, validate 11-test:
int sum = 0;
for (int i = 0; i < counterAccount.Length; i++) {
sum = sum + (9 - i) * (int)Char.GetNumericValue(
counterAccount[i]);
}
if (sum % 11 == 0) {
// 3. Look up counter account and make transfer object:
CheckingAccount acct = Accounts.FindAcctByNumber(counterAccount);
Transfer result = new Transfer(this, acct, amount);
return result;
} else {
throw new BusinessException("Invalid account number!");
}
}
public override Transfer MakeTransfer(string counterAccount, Money amount) {
if (amount.GreaterThan(this.transferLimit)) {
throw new BusinessException("Limit exceeded!");
}
return base.MakeTransfer(counterAccount, amount);
}