factory.cs

来自「C#设计模式源码」· CS 代码 · 共 64 行

using System;
using System.Collections.Generic;
using System.Text;

namespace DesignDll
{
    /************************************************************************
     * 工厂模式;(Factory Method) 定义一个用于创建对象的接口，让子类实例化哪个类
     * **********************************************************************/

    /// <summary>
    /// 此类有借助于简单工厂类中，加，减，乘，除类的操作基础上,提供创建工厂类的操作
    /// </summary>
    public interface ICreateOperator
    {
         Operation CreateOperator();
    }

    /// <summary>
    /// 加法工厂
    /// </summary>
    public class CreateOperationAdd : ICreateOperator
    {
        public Operation CreateOperator()
        {
            return new OperationAdd();
        }
    }

    /// <summary>
    /// 减法工厂
    /// </summary>
    public class CreateOperationSub : ICreateOperator
    {
        public Operation CreateOperator()
        {
            return new OperationSub();
        }
    }

    /// <summary>
    /// 乘法工厂
    /// </summary>
    public class CreateOperationAddMul : ICreateOperator
    {
        public Operation CreateOperator()
        {
            return new OperationMul();
        }
    }

    /// <summary>
    /// 除法工厂
    /// </summary>
    public class CreateOperationAddDiv : ICreateOperator
    {
        public Operation CreateOperator()
        {
            return new OperationDiv();
        }
    }

}