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职责链模式、桥接模式

2024-07-05 03:28:02   230人阅读

参考资料《大话设计模式》

职责链模式：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ds_chainofresponsibility
{
    class Program
    {
        static void Main(string[] args)
        {
            Handler h1 = new ConcreteHandler1();
            Handler h2 = new ConcreteHandler2();
            Handler h3 = new ConcreteHandler3();
            h1.SetSuccessor(h2);
            h2.SetSuccessor(h3);

            int[] requests = { 2, 5, 14, 22, 18, 3, 27, 20 ,100 };

            foreach (int request in requests)
            {
                h1.HandleRequest(request);
            }
        }
    }
    /// <summary>
    /// 处理请求的接口
    /// </summary>
    abstract class Handler
    {
        protected Handler successor;
        public void SetSuccessor(Handler successor)//设置继任者
        {
            this.successor = successor;
        }
        public abstract void HandleRequest(int request);//处理请求的抽象方法
    }
    /// <summary>
    /// 处理0-10之间的请求
    /// </summary>
    class ConcreteHandler1 : Handler
    {
        public override void HandleRequest(int request)
        {
            if (request >= 0 && request < 10)
            {
                Console.WriteLine("{0}处理请求{1}", this.GetType().Name, request);
            }
            else if (successor != null)
            {
                successor.HandleRequest(request);//转移到下一位
            }
        }
    }
    /// <summary>
    /// 处理10-20之间的请求
    /// </summary>
    class ConcreteHandler2 : Handler
    {
        public override void HandleRequest(int request)
        {
            if (request >= 10 && request < 20)
            {
                Console.WriteLine("{0}处理请求{1}", this.GetType().Name, request);
            }
            else if (successor != null)
            {
                successor.HandleRequest(request);//转移到下一位
            }
        }
    }
    /// <summary>
    /// 处理20-30之间的请求
    /// </summary>
    class ConcreteHandler3 : Handler
    {
        public override void HandleRequest(int request)
        {
            if (request >= 20 && request < 30)
            {
                Console.WriteLine("{0}处理请求{1}", this.GetType().Name, request);
            }
            else if (successor != null)
            {
                successor.HandleRequest(request);//转移到下一位
            }
            else
            {
                Console.WriteLine("不能处理请求{0}",request);
            }
        }
    }
}

桥接模式：将抽象部分与实现部分分离。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ds_bridge
{
    class Program
    {
        static void Main(string[] args)
        {
            
            Abstraction abs = new Abstraction();
            abs.SetImplementor(new ConcreteImplementorA());
            abs.Operation();

            abs.SetImplementor(new ConcreteImplementorB());
            abs.Operation();

            /*Implementor ss = new ConcreteImplementorA();
            ss.Operation();*/
        }
    }
    /// <summary>
    /// 实现
    /// </summary>
    abstract class Implementor
    {
        public abstract void Operation();
    }
    /// <summary>
    /// 具体实现
    /// </summary>
    class ConcreteImplementorA : Implementor
    {
        public override void Operation()
        {
            Console.WriteLine("具体实现A的方法执行");
        }
    }
    class ConcreteImplementorB : Implementor
    {
        public override void Operation()
        {
            Console.WriteLine("具体实现B的方法执行");
        }
    }
    /// <summary>
    /// 抽象
    /// </summary>
    class Abstraction
    {
        protected Implementor implementor;
        public void SetImplementor(Implementor implementor)
        {
            this.implementor = implementor;
        }
        public virtual void Operation()
        {
            implementor.Operation();
        }
    }
    class RefinedAbstraction : Abstraction
    {
        public override void Operation()
        {
            implementor.Operation();
        }
    }
}

 


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