二十三种设计模式之原型模式的C#实现

原型模式就是通过拷贝快速创建一个新的对象

本例UML如图

ColorBase

[Serializable]
    public abstract class ColorBase
    {
        public int R = 0;
        public int G = 0;
        public int B = 0;
        public virtual ColorBase Clone()
        {
            return this;
        }

        public virtual void ShowMe()
        {
            Console.WriteLine(string.Format(" r={0} g={1} b={2}", R, G, B));
        }
    }

　　RGBAColor

[Serializable]
    public class RGBAColor : ColorBase
    {
        public override ColorBase Clone()
        {
            ColorBase color;
            MemoryStream memoryStream = new MemoryStream();
            BinaryFormatter formatter = new BinaryFormatter();
            formatter.Serialize(memoryStream, this);
            memoryStream.Position = 0;
            color = (RGBAColor)formatter.Deserialize(memoryStream);
            return color;
        }
    }

　　ColorManager

 public class ColorManager
    {
        RGBAColor rgbColor = new RGBAColor();

        public ColorBase ColorBase
        {
            get
            {
                throw new System.NotImplementedException();
            }
            set
            {
            }
        }

        public ColorBase GetNewColor()
        {
            return rgbColor.Clone();
        }
    }

　　Main方法中进行测试

static void Main(string[] args)
        {
            ColorManager colorManager = new ColorManager();
            ColorBase red = colorManager.GetNewColor();
            red.R = 255;

            ColorBase green = colorManager.GetNewColor();
            green.G = 255;

            ColorBase blue = colorManager.GetNewColor();
            blue.B = 255;

            red.ShowMe();
            green.ShowMe();
            blue.ShowMe();

            Console.Read();
        }

　　执行结果