设计模式学习笔记--享元模式

using System;

namespace FlyWeight
{
    /// <summary> 
    /// 作者：bzyzhang
    /// 时间：2016/6/2 7:21:28 
    /// 博客地址：http://www.cnblogs.com/bzyzhang/
    /// FlyWeight说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 
    /// </summary> 
    public abstract class FlyWeight
    {
        public abstract void Operation(int extrinsticstate);
    }
}

using System;

namespace FlyWeight
{
    /// <summary> 
    /// 作者：bzyzhang
    /// 时间：2016/6/2 7:23:28 
    /// 博客地址：http://www.cnblogs.com/bzyzhang/
    /// ConcreteFlyWeight说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 
    /// </summary> 
    public class ConcreteFlyWeight : FlyWeight
    {
        public override void Operation(int extrinsticstate)
        {
            Console.WriteLine("具体FlyWeight：" + extrinsticstate);
        }
    }
}

using System;

namespace FlyWeight
{
    /// <summary> 
    /// 作者：bzyzhang
    /// 时间：2016/6/2 7:25:00 
    /// 博客地址：http://www.cnblogs.com/bzyzhang/
    /// UnsharedConcreteFlyWeight说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 
    /// </summary> 
    public class UnsharedConcreteFlyWeight:FlyWeight
    {
        public override void Operation(int extrinsticstate)
        {
            Console.WriteLine("不共享的具体FlyWeight：" + extrinsticstate);
        }
    }
}

using System;
using System.Collections;

namespace FlyWeight
{
    /// <summary> 
    /// 作者：bzyzhang
    /// 时间：2016/6/2 7:25:54 
    /// 博客地址：http://www.cnblogs.com/bzyzhang/
    /// FlyWeightFactory说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 
    /// </summary> 
    public class FlyWeightFactory
    {
        private Hashtable flyWeights = new Hashtable();

        public FlyWeightFactory()
        {
            flyWeights.Add("X",new ConcreteFlyWeight());
            flyWeights.Add("Y", new ConcreteFlyWeight());
            flyWeights.Add("Z", new ConcreteFlyWeight());
        }

        public FlyWeight GetFlyWeight(string key)
        {
            return (FlyWeight)flyWeights[key];
        }
    }
}

namespace FlyWeight
{
    class Program
    {
        static void Main(string[] args)
        {
            int extrinsicstate = 22;

            FlyWeightFactory flyWeightFactory = new FlyWeightFactory();

            FlyWeight flyWeightX = flyWeightFactory.GetFlyWeight("X");
            flyWeightX.Operation(--extrinsicstate);

            FlyWeight flyWeightY = flyWeightFactory.GetFlyWeight("Y");
            flyWeightY.Operation(--extrinsicstate);

            FlyWeight flyWeightZ = flyWeightFactory.GetFlyWeight("Z");
            flyWeightZ.Operation(--extrinsicstate);

            FlyWeight uf = new UnsharedConcreteFlyWeight();
            uf.Operation(--extrinsicstate);
        }
    }
}