设计模式之命令模式

 class Program
    {        //这个相当于饭店里   服务员记下客户的请求命令， 然后交给 厨师去执行请求    
        static void Main(string[] args)
        {
            Barbucure bar = new Barbucure();
            Command cc = new BakeMuttonCommand(bar);
            Command c2 = new BakeChilkenCommand(bar);
            Waiter w = new Waiter();
            w.SetCommand(cc);
            w.SetCommand(c2);

            w.Notify();
            
            Console.Read();
        }
    }

    public abstract class Command
    {
        protected Barbucure receiver;    //请求的执行者   类似于  厨师
        public Command(Barbucure receiver)   //实例化 Barbucure 对象
        {
            this.receiver = receiver;
        }
        public abstract void ExecuteCommand();
    }
    class BakeMuttonCommand : Command
    {
        public BakeMuttonCommand(Barbucure bar):base(bar)
        {
        }
        public override void ExecuteCommand()   //调用厨师 的方法
        {
            receiver.BakeMutton();
        }
    }

    class BakeChilkenCommand : Command
    {
        public BakeChilkenCommand(Barbucure bar)
            : base(bar)
        {
        }
        public override void ExecuteCommand()
        {
            receiver.BakeChilken();
        }
    }

    class Waiter                     //相当于 服务员  可以记下客户的请求，交给厨师执行
    {
        //private Command cmd;
        //public Waiter(Command cmd)
        //{
        //    this.cmd = cmd;
        //}
        //public void Notify()           //通知厨师执行方法。
        //{
        //    cmd.ExecuteCommand();
        //}
        List<Command> listCommand = new List<Command>();
        public void SetCommand(Command cmd)
        {
            listCommand.Add(cmd);
        }

        public void RemoveCommand(Command cmd)
        {
            listCommand.Remove(cmd);
        }

        public void Notify()
        {
            foreach (var item in listCommand)
            {
                item.ExecuteCommand();
            }
        }

    }
    
   public class Barbucure     //厨师的具体执行方法
    {
        public void BakeMutton()
        {
            Console.WriteLine("烤羊肉");
        }

        public void BakeChilken()
        {
            Console.WriteLine("烤鸡翅");
        }
    }