设计模式之——责任链模式

跳转到==>设计模式汇总

责任链模式(属于行为型模式)
1 很好理解，就是一个东西传下来，遇到合适的处理对象，才进行处理
2 重点：有多个处理者，这些处理者继承同一类；每个处理者有它的下一级处理者；当然每个的下一级是串联在一起的

    public class Mobile
    {
        public Mobile nextMobile;
        public Level mobileLevel;
        public Mobile()
        {
            nextMobile = new Honour();
            mobileLevel = Level.None;
        }

        public virtual void Call() { }

        public void CallSomeOne(Level level)
        {
            if (mobileLevel >= level)
            {
                this.Call();
            }
            else
            {
                nextMobile.Call();
            }
        }
    }

    public enum Level
    {
        None = 0,
        Low = 1,
        Middle = 2,
        High = 3
    }

    public class Honour : Mobile
    {
        public Honour()
        {
            nextMobile = new Note();
            mobileLevel = Level.Low;
        }

        public override void Call()
        {
            Console.WriteLine("call someone with honour ");
        }
    }

    public class Meta : Mobile
    {
        public Meta()
        {
            mobileLevel = Level.High;
            nextMobile = new Meta();
        }

        public override void Call()
        {
            Console.WriteLine("Call someone with Meta");
        }
    }

    public class Note : Mobile
    {
        public Note()
        {
            nextMobile = new Meta();
            mobileLevel = Level.Middle;
        }

        public override void Call()
        {
            Console.WriteLine("Call someone with Note");
        }
    }

    public class MobileUser
    {
        public static void CallSomeone()
        {
            Mobile phone = new Mobile();
            phone.CallSomeOne(Level.Middle);
        }
    }