Bridge 模式
抽象A-------抽象b---------实现细节B
抽象B----稳定
实现细节B-----变化
面向对象就是软件的复用,软件最伟大的地方就是复用 。
bridge模式的解释:抽象部分与实现部分分离,使他们都可以独立的变化。
bridge模式使用“对象间的组合关系”解耦了对象和实现之间固有的邦定,使得抽象(tank的型号)和实现(
不同的平台)可以沿着各自的纬度来变化
所谓抽象和实现沿着各自纬度的变化,即“子类话”它们,比如不同的Tank型号子类,和不同的平台
子类。得到各个子类之后,便可以任意组合它们,从而获得不同平台上的不同型号。
bridge模式有时候类似于多继承方案,但是多继承方案往往违背单一职责原则(即一个类只有一个变
化的原因),复用性比较差,bridge模式是比多继承方案更好的解决方法。
bridge模式的应用一般在“在两个非常强的变化纬度”,有的时候及时又两个变化的纬度,但是某个
方向的变化纬度并不剧烈--换言之两个变化不会导致纵横交错的结果,并不一定要使用bridge模式。
稳定部分:
public abstract class Tank
{
protected TankPlatFormImplementation tankImpl;
public Tank(TankPlatFormImplementation tankImpl)
{
this.TankImpl = tankImpl;
}
public TankPlatFormImplementation TankImpl
{
get
{
return this.tankImpl;
}
set
{
this.tankImpl = value;
}
}
public abstract void Shot();
public abstract void Run();
public abstract void Stop();
}
public abstract class TankPlatFormImplementation
{
public abstract void MoveTankTo(Point to);
public abstract void DrawTank();
public abstract void DoShot();
}
{
protected TankPlatFormImplementation tankImpl;
public Tank(TankPlatFormImplementation tankImpl)
{
this.TankImpl = tankImpl;
}
public TankPlatFormImplementation TankImpl
{
get
{
return this.tankImpl;
}
set
{
this.tankImpl = value;
}
}
public abstract void Shot();
public abstract void Run();
public abstract void Stop();
}
public abstract class TankPlatFormImplementation
{
public abstract void MoveTankTo(Point to);
public abstract void DrawTank();
public abstract void DoShot();
}
变化部分:
//型号维度的变化
public class T50 : Tank
{
public T50(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
}
public override void Shot()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
public class T75 : Tank
{
public T75(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Shot()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
public class T90 : Tank
{
public T90(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Shot()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
//平台维度的变化
public class PCTankImplementation : TankPlatFormImplementation
{
public override void MoveTankTo(Point to)
{
}
public override void DrawTank()
{
}
public override void DoShot()
{
}
}
public class MobileTankImplementation : TankPlatFormImplementation
{
public override void MoveTankTo(Point to)
{
}
public override void DrawTank()
{
}
public override void DoShot()
{
}
}
public class T50 : Tank
{
public T50(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
}
public override void Shot()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T50
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
public class T75 : Tank
{
public T75(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Shot()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T75
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
public class T90 : Tank
{
public T90(TankPlatFormImplementation tankImpl) : base(tankImpl)
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Shot()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Run()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
public override void Stop()
{
//T90
TankImpl.DrawTank();
TankImpl.DoShot();
TankImpl.MoveTankTo(to);
}
}
//平台维度的变化
public class PCTankImplementation : TankPlatFormImplementation
{
public override void MoveTankTo(Point to)
{
}
public override void DrawTank()
{
}
public override void DoShot()
{
}
}
public class MobileTankImplementation : TankPlatFormImplementation
{
public override void MoveTankTo(Point to)
{
}
public override void DrawTank()
{
}
public override void DoShot()
{
}
}
主程序:
//用于多个维度变化的对象
public static void Main()
{
//变化点
//Mobile T50 的组合
TankPlatFormImplementation TankImpl = new MobileTankImplementation();
T50 tank = new T50(TankImpl);
//PC T90 的组合
TankPlatFormImplementation TankImpl = new PCTankImplementation();
T90 tank = new T90(TankImpl);
}
public static void Main()
{
//变化点
//Mobile T50 的组合
TankPlatFormImplementation TankImpl = new MobileTankImplementation();
T50 tank = new T50(TankImpl);
//PC T90 的组合
TankPlatFormImplementation TankImpl = new PCTankImplementation();
T90 tank = new T90(TankImpl);
}