class1.cs

来自「来自DoFactory的设计模式, 由于是本人根据已有代码创建,没有NETOpt」· CS 代码 · 共 76 行

// Proxy pattern -- Real World example  

using System;

namespace DoFactory.GangOfFour.Proxy.RealWorld
{

    // Mainapp test application 

    class MainApp
    {
        static void Main()
        {
            // Create math proxy 
            MathProxy p = new MathProxy();

            // Do the math 
            Console.WriteLine("4 + 2 = " + p.Add(4, 2));
            Console.WriteLine("4 - 2 = " + p.Sub(4, 2));
            Console.WriteLine("4 * 2 = " + p.Mul(4, 2));
            Console.WriteLine("4 / 2 = " + p.Div(4, 2));

            // Wait for user 
            Console.Read();
        }
    }

    // "Subject" 

    public interface IMath
    {
        double Add(double x, double y);
        double Sub(double x, double y);
        double Mul(double x, double y);
        double Div(double x, double y);
    }

    // "RealSubject" 

    class Math : IMath
    {
        public double Add(double x, double y) { return x + y; }
        public double Sub(double x, double y) { return x - y; }
        public double Mul(double x, double y) { return x * y; }
        public double Div(double x, double y) { return x / y; }
    }

    // "Proxy Object" 

    class MathProxy : IMath
    {
        Math math;

        public MathProxy()
        {
            math = new Math();
        }

        public double Add(double x, double y)
        {
            return math.Add(x, y);
        }
        public double Sub(double x, double y)
        {
            return math.Sub(x, y);
        }
        public double Mul(double x, double y)
        {
            return math.Mul(x, y);
        }
        public double Div(double x, double y)
        {
            return math.Div(x, y);
        }
    }
}