C#设计模式(3)——工厂方法模式

namespace 设计模式之工厂方法模式
{
    /// <summary>
    /// 菜抽象类
    /// </summary>
    public abstract class Food
    {
        // 输出点了什么菜
        public abstract void Print();
    }

    /// <summary>
    /// 西红柿炒鸡蛋这道菜
    /// </summary>
    public class TomatoScrambledEggs : Food
    {
        public override void Print()
        {
            Console.WriteLine("西红柿炒蛋好了！");
        }
    }

    /// <summary>
    /// 土豆肉丝这道菜
    /// </summary>
    public class ShreddedPorkWithPotatoes : Food
    {
        public override void Print()
        {
            Console.WriteLine("土豆肉丝好了");
        }
    }

    /// <summary>
    /// 抽象工厂类
    /// </summary>
    public abstract class Creator
    {
        // 工厂方法
        public abstract Food CreateFoddFactory();
    }

    /// <summary>
    /// 西红柿炒蛋工厂类
    /// </summary>
    public class TomatoScrambledEggsFactory:Creator
    {
        /// <summary>
        /// 负责创建西红柿炒蛋这道菜
        /// </summary>
        /// <returns></returns>
        public override Food CreateFoddFactory()
        {
            return new TomatoScrambledEggs();
        }
    }

    /// <summary>
    /// 土豆肉丝工厂类
    /// </summary>
    public class ShreddedPorkWithPotatoesFactory:Creator
    {
        /// <summary>
        /// 负责创建土豆肉丝这道菜
        /// </summary>
        /// <returns></returns>
        public override Food CreateFoddFactory()
        {
            return new ShreddedPorkWithPotatoes();
        }
    }

    /// <summary>
    /// 客户端调用
    /// </summary>
    class Client
    {
        static void Main(string[] args)
        {
            // 初始化做菜的两个工厂（）
            Creator shreddedPorkWithPotatoesFactory = new ShreddedPorkWithPotatoesFactory();
            Creator tomatoScrambledEggsFactory = new TomatoScrambledEggsFactory();

            // 开始做西红柿炒蛋
            Food tomatoScrambleEggs = tomatoScrambledEggsFactory.CreateFoddFactory();
            tomatoScrambleEggs.Print();

            //开始做土豆肉丝
            Food shreddedPorkWithPotatoes = shreddedPorkWithPotatoesFactory.CreateFoddFactory();
            shreddedPorkWithPotatoes.Print();

            Console.Read();
        }
    }  
}