C#面向对象设计模式纵横谈——9. Composite组合模式

主讲：李建忠

来源：http://www.microsoft.com/china/msdn/events/webcasts/shared/webcast/consyscourse/CsharpOOD.aspx

 

 

Compositepublic interface IBox

{

    public abstract void Process();

    public abstract void Add(IBox box);

    public abstract void Remove(IBox box);

}



public class SingleBox:IBox

{

    public void Add(IBox box)

    {

        throw new UnSupportedException();

    }



    public void Remove(IBox box)

    {

        throw new UnSupportedException();

    }



    public void Process()

    {

        //Do process for myself

        //...

    }

}



public class ContainerBox:IBox

{

    ArrayList  list=null;



    public void Add()

    {

        throw new UnSupportedException();

    }



    public abstract void Remove()

    {

        throw new UnSupportedException();

    }



    public void Process()

    {

        //Do process for myself

        //...



        //Do process for the box in the list

        if(list!=null)

	{

	    foreach(IBox box in list)  //内部实现递归

	    {

		box.Process();

	    }

	}

    }

}



//客户代码

class App

{

    public static void Main()

    {

        IBox box=Factory.CreateBox();



	box.Process();

    }

}