学习笔录——大话设计模式——原型模式

Posted 2020-12-08 caiyangcc

学习笔录——设计模式

原型模式(Prototype)

简介

原型模式就是从一个对象在创建另一个可定制的对象，而不需要知道任何创建的细节。

代码示例

 
    public class WorkDeep : ICloneable
    {
        public string WorkDate { get; set; }

        public string Company { get; set; }

        public object Clone()
        {
            return (object)this.MemberwiseClone();
        }
    }

    public class ResumeDeep : ICloneable
    {
        public string Name { get; set; }
        public int Age { get; set; }

        public WorkDeep Work { get; set; }

        private ResumeDeep(WorkDeep work)
        {
            this.Work = (WorkDeep)work.Clone();
        }

        public ResumeDeep(string name, int age)
        {
            this.Name = name;
            this.Age= age;
            this.Work = new WorkDeep();
        }
        
        public void SetWork(string company, string workDate)
        {
            this.Work.WorkDate = workDate;
            this.Work.Company = company;
        }

        public void Display()
        {
            System.Console.WriteLine(this.Name + this.Age);
            System.Console.WriteLine($"{this.Work.Company} {this.Work.Company}");
        }

        public object Clone()
        {
            ResumeDeep resume = new ResumeDeep(this.Work);
            resume.Name = this.Name;
            resume.Age = this.Age;
            return resume;
        }
    }

    static void Main(string[] args)
    {
        // Resume resume = new Resume("hmy");
        // resume.SetPersonInfo(21);
        // resume.SetWorkExperience("2020","YH");

        // Resume resume1 = (Resume)resume.Clone();
        // resume1.SetWorkExperience("2019", string.Empty);

        ResumeDeep resume3 = new ResumeDeep("hmy", 21);
        resume3.SetWork("2020","YH");

        ResumeDeep resume4 = (ResumeDeep)resume3.Clone();
        resume4.SetWork("2019", string.Empty);

        resume3.Display();
        resume4.Display();

        Console.Read();
    }

个人理解，不足之处还请指教。

需要注意值类型和引用类型，在进行复制时的区别，浅复制只会复制值类型，引用类型只会复制引用，比如我在EFCore值类型时的坑的示例

EFCore值类型时的坑的示例