【设计模式】之中介者模式

• UML

• 举例

	//同事抽象类
    class Colleague
    {
        protected Mediator mediator;

        public Colleague(Mediator mediator)
        {
            this.mediator = mediator;
        }
    }

	//中介者抽象类
    abstract class Mediator
    {
        public abstract void Send(string message, Colleague colleague);
    }

	//同事1
    class ConcreteColleague1 : Colleague
    {
        public ConcreteColleague1(Mediator mediator) : base(mediator)
        {
        }
        public void Send(string message)
        {
            mediator.Send(message, this);
        }

        public void Notify(string message)
        {
            Console.WriteLine($"同事1得到消息：{message}");
        }
    }

	//同事2
    class ConcreteColleague2 : Colleague
    {
        public ConcreteColleague2(Mediator mediator) : base(mediator)
        {
        }

        public void Send(string message)
        {
            mediator.Send(message, this);
        }

        public void Notify(string message)
        {
            Console.WriteLine($"同事2得到消息：{message}");
        }
    }

class ConcreteMediator : Mediator
    {

        private ConcreteColleague1 colleague1;
        private ConcreteColleague2 colleague2;
        public override void Send(string message, Colleague colleague)
        {
            if(colleague==colleague1)
            {
                colleague2.Notify(message);
            }
            else
            {
                colleague1.Notify(message);
            }
        }

        public ConcreteColleague1 Colleague1 { get => colleague1; set => colleague1 = value; }
        public ConcreteColleague2 Colleague2 { get => colleague2; set => colleague2 = value; }

        
    }

class Program
    {
        static void Main(string[] args)
        {
            ConcreteMediator mediator = new ConcreteMediator();
            ConcreteColleague1 colleague1 = new ConcreteColleague1(mediator);
            ConcreteColleague2 colleague2 = new ConcreteColleague2(mediator);

            mediator.Colleague1 = colleague1;
            mediator.Colleague2 = colleague2;

            colleague1.Send("你好啊！colleague2");
            colleague2.Send("你好，colleague1");
        }
    }