CSharp: Visitor Pattern

 

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/// <summary>
/// Summary description for Employee.
/// Visitor Pattern 访问者模式
///20220918
/// geovindu,Geovin Du,涂聚文
/// </summary>
public class Employee
{
    int sickDays, vacDays;
    float salary;
    string name;
    /// <summary>
    ///
    /// </summary>
    /// <param name="name"></param>
    /// <param name="salary"></param>
    /// <param name="vDays"></param>
    /// <param name="sDays"></param>
    public Employee(string name, float salary, int vDays, int sDays)
    {
        this.name = name;
        this.salary = salary;
        sickDays = sDays;
        vacDays = vDays;
    }
    /// <summary>
    ///
    /// </summary>
    public string Name
    {
        get { return name; }
        set { name = value; }
    }
    /// <summary>
    ///
    /// </summary>
    public float Salary
    {
 
        get { return salary; }
        set { salary = value; }
 
    }
    /// <summary>
    ///
    /// </summary>
    public int SickDays
    {
 
        get { return sickDays; }
        set { sickDays = value; }
 
    }
    /// <summary>
    ///
    /// </summary>
    public int VacDays
    {
 
        get { return vacDays; }
        set { vacDays = value; }
 
    }
    /// <summary>
    ///
    /// </summary>
    /// <returns></returns>
    public string getName()
    {
        return name;
    }
    /// <summary>
    ///
    /// </summary>
    /// <returns></returns>
    public int getSickDays()
    {
        return sickDays;
    }
    /// <summary>
    ///
    /// </summary>
    /// <returns></returns>
    public int getVacDays()
    {
        return vacDays;
    }
    /// <summary>
    ///
    /// </summary>
    /// <returns></returns>
    public float getSalary()
    {
        return salary;
    }
    /// <summary>
    ///
    /// </summary>
    /// <param name="v"></param>
    public virtual void accept(Visitor v)
    {
        v.visit(this);
    }
    /// <summary>
    ///
    /// </summary>
    /// <returns></returns>
    public string toString()
    {
        return name + "," + salary.ToString() + "," + sickDays.ToString() + "," + vacDays.ToString() + "";
    }
}

　　

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/// <summary>
/// Summary description for Visitor.
/// Visitor Pattern 访问者模式
///20220918
/// geovindu,Geovin Du,涂聚文
/// </summary>
public abstract class Visitor
{
    /// <summary>
    ///
    /// </summary>
    /// <param name="emp"></param>
    public abstract void visit(Employee emp);
 
    /// <summary>
    ///
    /// </summary>
    /// <param name="bos"></param>
    public abstract void visit(Boss bos);
}

　　

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/// <summary>
 /// Summary description for Manager.\
 /// Visitor Pattern 访问者模式
 ///20220918
 /// geovindu,Geovin Du,涂聚文
 /// </summary>
 public class Manager : Employee
 {
     private int bonusDays;
     /// <summary>
     ///
     /// </summary>
     /// <param name="nm"></param>
     /// <param name="slry"></param>
     /// <param name="vDays"></param>
     /// <param name="sDays"></param>
     public Manager(string nm, float slry, int vDays, int sDays) :
         base(nm, slry, vDays, sDays)
     {
     }
     /// <summary>
     ///
     /// </summary>
     /// <param name="bd"></param>
     public void setBonusDays(int bd)
     {
         bonusDays = bd;
     }
     /// <summary>
     ///
     /// </summary>
     /// <returns></returns>
     public int getBonusDays()
     {
         return bonusDays;
     }
     /// <summary>
     ///
     /// </summary>
     /// <param name="v"></param>
     public override void accept(Visitor v)
     {
         v.visit(this);
     }
 }

　　

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/// <summary>
  /// Summary description for Boss.
  /// Visitor Pattern 访问者模式
  ///20220918
  /// geovindu,Geovin Du,涂聚文
  /// </summary>
  public class Boss : Employee
  {
      private int bonusDays;
 
      /// <summary>
      ///
      /// </summary>
      /// <param name="name"></param>
      /// <param name="salary"></param>
      /// <param name="vdays"></param>
      /// <param name="sdays"></param>
      public Boss(string name, float salary, int vdays, int sdays)
          : base(name, salary, vdays, sdays)
      { }
      /// <summary>
      ///
      /// </summary>
      /// <param name="bdays"></param>
      public void setBonusDays(int bdays)
      {
          bonusDays = bdays;
      }
      /// <summary>
      ///
      /// </summary>
      /// <returns></returns>
      public int getBonusDays()
      {
          return bonusDays;
      }
      /// <summary>
      ///
      /// </summary>
      /// <param name="v"></param>
      public override void accept(Visitor v)
      {
          v.visit(this);
      }
  }

　　

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/// <summary>
  /// Summary description for VacationVisitor.
  /// Visitor Pattern 访问者模式
  ///20220918
  /// geovindu,Geovin Du,涂聚文
  /// </summary>
  public class VacationVisitor : Visitor
  {
      private int totalDays;
      /// <summary>
      ///
      /// </summary>
      public VacationVisitor()
      {
          totalDays = 0;
      }
      /// <summary>
      ///
      /// </summary>
      /// <returns></returns>
      public int getTotalDays()
      {
          return totalDays;
      }
      /// <summary>
      ///
      /// </summary>
      /// <param name="emp"></param>
      public override void visit(Employee emp)
      {
          totalDays += emp.getVacDays();
      }
      /// <summary>
      ///
      /// </summary>
      /// <param name="bos"></param>
      public override void visit(Boss bos)
      {
          totalDays += bos.getVacDays();
      }
  }

　　

调用：

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/// <summary>
 /// Visitor Pattern 访问者模式
 ///20220918
 /// geovindu,Geovin Du,涂聚文
 /// </summary>
 public partial class VisitorPatternForm : Form
 {
 
     private List<Employee>  empls;
     private Employee empl;
     private Boss bos;
     /// <summary>
     ///
     /// </summary>
     private void init()
     {
         int i = 0;
         empls = new List<Employee>();
         empl = new Employee("Susan Bear", 55000, 12, 1);
         empls.Add(empl);
         empl = new Employee("Adam Gehr", 150000, 9, 0);
         empls.Add(empl);
         empl = new Employee("Fred Harris", 50000, 15, 2);
         empls.Add(empl);
         empl = new Employee("David Oakley", 57000, 12, 2);
         empls.Add(empl);
         empl = new Employee("Larry Thomas", 100000, 20, 6);
         empls.Add(empl);
         bos = new Boss("Leslie Susi", 175000, 16, 4);
         empls.Add(empl);
         bos.setBonusDays(12);
         empls.Add(bos);
         bos = new Boss("Laurence Byerly", 35000, 17, 6);
         bos.setBonusDays(17);
         empls.Add(bos);
          
       
     }
     /// <summary>
     ///
     /// </summary>
     public VisitorPatternForm()
     {
         InitializeComponent();
         init();
     }
     /// <summary>
     ///
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>
     private void VisitorPatternForm_Load(object sender, EventArgs e)
     {
         this.dataGridView1.DataSource = empls;
     }
     /// <summary>
     ///
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>
     private void btCompute_Click(object sender, EventArgs e)
     {
         VacationVisitor vac = new VacationVisitor();
         VacationVisitor bvac = new VacationVisitor();
         for (int i = 0; i < empls.Count; i++)
         {
             empls[i].accept(vac);      //get the employee
             empls[i].accept(bvac);
         }
         lsVac.Items.Add("Total vacation days=" + vac.getTotalDays().ToString());
         lsVac.Items.Add("Total boss vacation days=" + bvac.getTotalDays().ToString());
 
         this.dataGridView1.DataSource = empls;
     }
 }

　　

输出：

 

posted @   ®Geovin Du Dream Park™  阅读(20)  评论(0)  编辑  收藏  举报
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