static void Main(string[] args)
{
var ba = new BankAccount();
var cmdDeposit = new BankAccountCommand(ba,
BankAccountCommand.Action.Deposit, 100);
var cmdWithdraw = new BankAccountCommand(ba,
BankAccountCommand.Action.Withdraw, 1000);
cmdDeposit.Call();
cmdWithdraw.Call();
WriteLine(ba);
cmdWithdraw.Undo();
cmdDeposit.Undo();
WriteLine(ba);
var from = new BankAccount();
from.Deposit(100);
var to = new BankAccount();
var mtc = new MoneyTransferCommand(from, to, 1000);
mtc.Call();
// Deposited $100, balance is now 100
// balance: 100
// balance: 0
WriteLine(from);
WriteLine(to);
}
public override void Call()
{
BankAccountCommand last = null;
foreach (var cmd in this)
{
if (last == null || last.Success)
{
cmd.Call();
last = cmd;
}
else
{
cmd.Undo();
break;
}
}
}
static void Main(string[] args)
{
// composite
var ba = new BankAccount();
var cmdDeposit = new BankAccountCommand(ba,
BankAccountCommand.Action.Deposit, 100);
var cmdWithdraw = new BankAccountCommand(ba,
BankAccountCommand.Action.Withdraw, 1000);
var composite = new CompositeBankAccountCommand(new[] {
cmdDeposit, cmdWithdraw
});
composite.Call();
Console.WriteLine(ba);
composite.Undo();
Console.WriteLine(ba);
// money transfer
var from = new BankAccount();
from.Deposit(100);
var to = new BankAccount();
var mtc = new MoneyTransferCommand(from, to, 1000);
mtc.Call();
Console.WriteLine(from);
Console.WriteLine(to);
mtc.Undo();
Console.WriteLine(from);
Console.WriteLine(to);
}