原型模式(Prototype Pattern)

一、介绍

　　用原型实例指定创建对象的种类，并且通过拷贝这些原型创建新的对象。Prototype原型模式是一种创建型设计模式，Prototype模式允许一个对象再创建另外一个可定制的对象，根本无需知道任何如何创建的细节,工作原理是:通过将一个原型对象传给那个要发动创建的对象，这个要发动创建的对象通过请求原型对象拷贝它们自己来实施创建。

二、UML图

三、示例

public class Dog
    {
        /// <summary>
        /// 名称
        /// </summary>
        public string Name { get; set; }
        /// <summary>
        /// 行为
        /// </summary>
        public string Action { get; set; }
    }
    /// <summary>
    /// 浅拷贝
    /// </summary>
    public class ShallowClone : ICloneable
    {

        #region IClone 成员
        public ShallowClone(Dog model, string Tag)
        {
            this.DogModel = model;
            this.Tag = Tag;
        }

        public object Clone()
        {
            return this.MemberwiseClone();
          
        }
        public string Tag { get; set; }
        /// <summary>
        /// 实体属性
        /// </summary>
        public Dog DogModel { get; set; }

        #endregion
    }
    /// <summary>
    /// 深拷贝
    /// </summary>
    public class DeepClone : ICloneable
    {
        #region IClone 成员
        public DeepClone(Dog model, string tag)
        {
            this.DogModel = model;
            this.Tag = tag;
        }
        public object Clone()
        {
            return new DeepClone(new Dog { Name = DogModel.Name, Action = DogModel.Action },this.Tag);
           
        }
        public string Tag { get; set; }
        /// <summary>
        /// 实体属性
        /// </summary>
        public Dog DogModel { get; set; }

        #endregion

    }

//program

static void Main(string[] args)
        {

            ShallowClone lowClone = new ShallowClone(new Dog { Name = "Dog", Action = "啃骨头" }, "浅拷贝");
            
            ShallowClone lowClone2 = (ShallowClone)lowClone.Clone();
            lowClone2.Tag = "浅拷贝克隆";
            lowClone2.DogModel.Name = "小狗";


            Console.WriteLine(lowClone.Tag+":"+ lowClone.DogModel.Name + lowClone.DogModel.Action);
            Console.WriteLine(lowClone2.Tag+":" + lowClone2.DogModel.Name + lowClone2.DogModel.Action);



            DeepClone deepClone = new DeepClone(new Dog { Name = "Dog", Action = "啃骨头" }, "深拷贝");
            DeepClone deepClone2 = (DeepClone)deepClone.Clone();
            deepClone2.Tag = "深拷贝克隆";
            deepClone2.DogModel.Name = "小狗";
            Console.WriteLine(deepClone.Tag + ":" + deepClone.DogModel.Name + deepClone.DogModel.Action);
            Console.WriteLine(deepClone2.Tag + ":" + deepClone2.DogModel.Name + deepClone2.DogModel.Action);


            Console.Read();
        }

//运行结果