深入浅出设计模式——职责链模式（Chain of Responsibility Pattern）

namespace ChainofResponsibilityPattern
{
//管理者
abstract class Manager
{
protected string name;
//管理者的上级
protected Manager superior;
public Manager(string name)
{
this.name = name;
}
//设置管理者的上级
public void SetSuperior(Manager superior)
{
this.superior = superior;
}
//申请请求
abstract public void RequestApplications(Request request);
}
}

namespace ChainofResponsibilityPattern
{
class Request
{
//申请类别
private string requestType;
public string RequestType
{
get { return requestType; }
set { requestType = value; }
}
//申请内容
private string requestContent;
public string RequestContent
{
get { return requestContent; }
set { requestContent = value; }
}
//数量
private int number;
public int Number
{
get { return number; }
set { number = value; }
}
}
}

using System;namespace ChainofResponsibilityPattern
{
//经理
class CommonManager : Manager
{
public CommonManager(string name)
: base(name)
{
}
public override void RequestApplications(Request request)
{
if (request.RequestType == "请假" && request.Number <= )
{
//经理所能有的权限就是可批准下属两天内的假期
Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
}
else
{
if (superior != null)
{
superior.RequestApplications(request);//其余的申请都需转到上级
}
}
}
}
}

using System;namespace ChainofResponsibilityPattern
{
//总监
class Majordomo : Manager
{
public Majordomo(string name)
: base(name)
{
}
public override void RequestApplications(Request request)
{
if (request.RequestType == "请假" && request.Number <= )
{
//总监所能有的权限就是可批准下属一周内的假期
Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
}
else
{
if (superior != null)
{
superior.RequestApplications(request);//其余的申请都需转到上级
}
}
}
}
}

using System;namespace ChainofResponsibilityPattern
{
//总经理
class GeneralManager : Manager
{
public GeneralManager(string name)
: base(name)
{
}
public override void RequestApplications(Request request)
{
if (request.RequestType == "请假")
{
//总经理可准许下属任意天的假期
Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
}
else if (request.RequestType == "加薪" && request.Number <= )
{
Console.WriteLine("{0}:{1} 数量{2} 被批准", name, request.RequestContent, request.Number);
}
else if (request.RequestType == "加薪" && request.Number > )
{
Console.WriteLine("{0}:{1} 数量{2} 再说吧", name, request.RequestContent, request.Number);
}
}
}
}

using System;namespace ChainofResponsibilityPattern
{
class Program
{
static void Main(string[] args)
{
CommonManager commonManger = new CommonManager("张经理");
Majordomo majordomo = new Majordomo("李总监");
GeneralManager generalManager = new GeneralManager("王总经理");
//设置上级，完全可以根据实际需求来更改设置
commonManger.SetSuperior(majordomo);
majordomo.SetSuperior(generalManager); Request request = new Request();
request.RequestType = "请假";
request.RequestContent = "小菜请假";
request.Number = ;
//客户端的申请都是由经理发起，但实际谁来决策由具体类来处理，客户端不知道
commonManger.RequestApplications(request); Request request2 = new Request();
request2.RequestType = "请假";
request2.RequestContent = "小菜请假";
request2.Number = ;
commonManger.RequestApplications(request2); Request request3 = new Request();
request3.RequestType = "加薪";
request3.RequestContent = "小菜请求加薪";
request3.Number = ;
commonManger.RequestApplications(request3); Request request4 = new Request();
request4.RequestType = "加薪";
request4.RequestContent = "小菜请求加薪";
request4.Number = ;
commonManger.RequestApplications(request4); Console.Read();
}
}
}