设计模式之建造者模式

//最终产品
class Mate
{
    public string CPU { get; set; }
    public string Screen { get; set; }
    public string System { get; set; }

    public void LoadCPU(string cpu)
    {
        this.CPU = cpu;
    }
    
    public void LoadScreen(string scr)
    {
        this.Screen = scr;
    }

    public void LoadSystem(string sys)
    {
        this.System = sys;
    }

    public override string ToString ()
    {
        return $"Mate Stats：\n{CPU}\n{Screen}\n{System}";
    }
}

//抽象建造者
abstract class ABuilder
{
    protected Mate mate = new Mate ();

    public abstract void BuildCPU ();
    public abstract void BuildScreen ();
    public abstract void BuildSystem ();

    public Mate Products () => mate;

}

//具体建造者
class BuilderMate : ABuilder
{
    public override void BuildCPU ()
    {
        mate.LoadCPU ("CPU--就位");
    }

    public override void BuildScreen ()
    {
        mate.LoadScreen ("屏幕--就位");
    }

    public override void BuildSystem ()
    {
        mate.LoadSystem ("系统--就位");
    }
}

//指挥者
class Commander
{
    ABuilder bm = null;
    public Commander (ABuilder bm)
    {
        this.bm = bm;
    }

    //组装，出品
    public Mate construct ()
    {
        bm.BuildCPU ();
        bm.BuildScreen ();
        bm.BuildSystem ();
        return bm.Products ();
    }
}

ABuilder b = new BuilderMate ();
Commander comm = new Commander (b);
Mate m= comm.construct ();
Console.WriteLine (m.ToString ());