职责链模式代码,MSSQL代码库,德仔网

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【MSSQL】职责链模式
作者:ling1510 / 发布于2014/4/11/ 1089
职责链模式实例
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Chain_of_Responsibility_Use
{
  class PurchaseReuest
  {
    private int number;
    private double amount;
    private string purpose;

    public PurchaseReuest(int number, double amount, string purpose)
    {
      this.amount = amount;
      this.number = number;
      this.purpose = purpose;
    }
    public int Number
    {
      get { return number; }
      set { number = value; }
    }
    public double Amount
    {
      get { return amount; }
      set { amount = value; }
    }
    public string Purpose
    {
      get { return purpose; }
      set { purpose = value; }
    }
  }
  abstract class Approver
  {
    protected string name;
    protected Approver successor;

    public Approver(string name)
    {
      this.name = name;
    }
    public void setSuccessor(Approver successor)
    {
      this.successor = successor;
    }
    abstract public void ProcessRequest(PurchaseReuest request);
  }
  //ConcreteHandler
  class Director : Approver
  {
    public Director(string name)
      : base(name) { }
    public override void ProcessRequest(PurchaseReuest request)
    {
      //throw new NotImplementedException();
      if (request.Amount < 10000.0)
        Console.WriteLine("{0} {1} approved request# {2} ", this, name, request.Number);
      else
        if (successor != null)
          successor.ProcessRequest(request);
    }
  }
  //ConcreteHandler
  class VicePresident : Approver
  {
    public VicePresident(string name) : base(name) { }
    public override void ProcessRequest(PurchaseReuest request)
    {
      //throw new NotImplementedException();
      if (request.Amount < 25000.0)
        Console.WriteLine("{0} {1} approved request# {2} ", this, name, request.Number);
      else
        if (successor != null)
          successor.ProcessRequest(request);
    }
  }
  //ConcreteHandler
  class President : Approver
  {
    public President(string name) : base(name) { }
    public override void ProcessRequest(PurchaseReuest request)
    {
      //throw new NotImplementedException();
      if (request.Amount < 100000.0)
        Console.WriteLine("{0} {1} approved request# {2} ", this, name, request.Number);
      else
        Console.WriteLine("Request# {0} request " + "an executie meeting ! ", request.Number);
    }
  }

  class Program
  {
    static void Main(string[] args)
    {
      Director Larry = new Director("Larry");
      VicePresident Sam = new VicePresident("Sam");
      President Tammy = new President("Tammy");
      Larry.setSuccessor(Sam);
      Sam.setSuccessor(Tammy);

      PurchaseReuest rs = new PurchaseReuest(2034, 350.00, "Supplies");
      Larry.ProcessRequest(rs);

      PurchaseReuest rx = new PurchaseReuest(2035, 12590.10, "Project X");
      Larry.ProcessRequest(rx);

      PurchaseReuest ry = new PurchaseReuest(2036, 122100.00, "Project Y");
      Larry.ProcessRequest(ry);

      Console.ReadKey();
    }
  }
}
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