【Unity3D与23种设计模式】享元模式（Flyweight）

//可以被共享的Flyweight接口
public abstract class Flyweight {
    protected string m_Count;

    public Flyweight() { }

    public Flyweight(string Content)
    {
        m_Count = Content;
    }

    public string GetContent() {
        return m_Count;
    }

    public abstract void Opreator();
}

//共享的组件
public class ConcreteFlyweight : Flyweight {
    public ConcreteFlyweight(string Content) : base(Content) { }

    public override void Opreator()
    {
        Debug.Log("ConcreteFlyweight.Content["+m_Count+"]");
    }
}

//不共享的组件
public class UnsharedCoincreteFlyweight {
    Flyweight m_Flyweight = null;
    string m_UnsharedContent;

    public UnsharedCoincreteFlyweight(string Content) {
        m_UnsharedContent = Content;
    }

    public void SetFlyweight(Flyweight theFlyweight) {
        m_Flyweight = theFlyweight;
    }

    public void Operator() {
        string Msg = string.Format("UnsharedCoincreteFlyweight.Content[{0}]",m_UnsharedContent);

        if (m_Flyweight != null)
            Msg += "包含了：" + m_Flyweight.GetContent();
        Debug.Log(Msg);
    }
}

//产生Flyweight的工厂接口
public class FlyweightFactor {
    Dictionary<string, Flyweight> m_Flyweights = new Dictionary<string, Flyweight>();

    public Flyweight GetFlyweight(string Key,string Content) {
        if (m_Flyweights.ContainsKey(Key)) {
            return m_Flyweights[Key];
        }

        ConcreteFlyweight theFlyweight = new ConcreteFlyweight(Content);

        m_Flyweights[Key] = theFlyweight;
        Debug.Log("New ConcreteFlyweight Key["+Key+"] Content["+ Content +"]");
        return theFlyweight;
    }
    public UnsharedCoincreteFlyweight GetUnsharedFlyweight(string Content) {
        return new UnsharedCoincreteFlyweight(Content);
    }

    public UnsharedCoincreteFlyweight GetUnsharedFlyweight(string Key, string SharedContent, string UnsharedContent) {
        Flyweight SharedFlyweight = GetFlyweight(Key,SharedContent);

        UnsharedCoincreteFlyweight theFlyweight = new UnsharedCoincreteFlyweight(UnsharedContent);
        theFlyweight.SetFlyweight(SharedFlyweight);
        return theFlyweight;
    }
}

//测试类
void UnitTest() {
        FlyweightFactor theFactory = new FlyweightFactor();

        theFactory.GetFlyweight("1","共享组件1");
        theFactory.GetFlyweight("2","共享组件2");
        theFactory.GetFlyweight("3","共享组件3");
    }

//输出信息
New ConcreteFlyweight Key[1] Content[共享组件1]
New ConcreteFlyweight Key[2] Content[共享组件2]
New ConcreteFlyweight Key[3] Content[共享组件3]