C# 设计模式系列教程-原型模式

　　3.4 简历的深复制实现

 /// <summary>
 /// 实现了ICloneable接口的简历类
 /// </summary>
 public class Resume : ICloneable
 {
 public Resume()
 {
  mWorkExperience = new WorkExperience();
 }

 /// <summary>
 /// 这里使用一个私有的构造函数来对其连接到的引用类型进行复制
 /// </summary>
 /// <param name="workExperience"></param>
 private Resume(WorkExperience workExperience)
 {
  this.mWorkExperience = (WorkExperience)workExperience.Clone();
 }

 private string mName;
 private string mSex;
 private int mAge;
 private WorkExperience mWorkExperience;

 public string Name
 {
  get { return mName; }
  set { mName = value; }
 }

 public string Sex
 {
  get { return mSex; }
  set { mSex = value; }
 }

 public int Age
 {
  get { return mAge; }
  set { mAge = value; }
 }

 public WorkExperience WorkExperience
 {
  get { return mWorkExperience; }
 }

 /// <summary>
 /// 设置功过经历
 /// </summary>
 /// <param name="startDate"></param>
 /// <param name="endDate"></param>
 /// <param name="company"></param>
 /// <param name="position"></param>
 public void SetWorkExperience(DateTime startDate, DateTime endDate, string company, string position)
 {
  this.mWorkExperience.Company = company;
  this.mWorkExperience.EndDate = endDate;
  this.mWorkExperience.StartDate = startDate;
  this.mWorkExperience.Position = position;
 }

 /// <summary>
 /// 实现ICloneable接口的Clone方法
 /// </summary>
 /// <returns></returns>
 public object Clone()
 {
  // 这里不再使用MemberwiseClone方法进行复制了，而是新创建了一个全新的简历。它完全是在内部实现的，外部不用关心它的实现
  Resume newResume = new Resume(this.mWorkExperience);
  newResume.mSex = this.mSex;
  newResume.mName = this.mName;
  newResume.mAge = this.mAge;

  return newResume;
 }
 }

 public class WorkExperience :ICloneable
 {
 public DateTime StartDate { get; set; }
 public DateTime EndDate { get; set; }
 public string Company { get; set; }
 public string Position { get; set; }

 public object Clone()
 {
  // 使用.Net 为我们提供的浅复制对象的方法，因为这里已经没有引用对象了（string虽然是引用类型，但.NET为我们做了特别处理，可以像值类型一样使用它）。
  return this.MemberwiseClone();
 }
 }

 [TestMethod]
 public void TestDeepCopy()
 {
  Resume myFirstResume = new Resume
  {
  Age = 29,
  Name = "Kevin Wang",
  Sex = "男",
  };
  myFirstResume.SetWorkExperience(new DateTime(2006, 7, 1), new DateTime(2007, 7, 1), "My First Company", "Software Engineer");

  Resume mySecondResume = (Resume)myFirstResume.Clone();
  mySecondResume.SetWorkExperience(new DateTime(2007, 8, 1), new DateTime(2008, 8, 1), "My Second Company", "Software Engineer");

  Resume myThirdResume = (Resume)myFirstResume.Clone();
  myThirdResume.SetWorkExperience(new DateTime(2008, 8, 1), new DateTime(2009, 8, 1), "My Third Company", "Senior Software Engineer");

  Assert.AreEqual("My First Company", myFirstResume.WorkExperience.Company);
  Assert.AreEqual("My Second Company", mySecondResume.WorkExperience.Company);
  Assert.AreEqual("My Third Company", myThirdResume.WorkExperience.Company); 
 }

								 
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