static void Main(string[] args)
{
ICamera camera = new TimerDecorator(new FlashDecorator(new SimpleCamera()));
Console.WriteLine(camera.Capture());
var newCam = new LensDecorator(CameraDecorator.RemoveRole <TimerDecorator>(camera));
Console.WriteLine(newCam.Capture());
var timer = CameraDecorator.GetRole <TimerDecorator>(camera);
timer.WaitTimer();
}
public static T GetRole <T>(ICamera decorator) where T : CameraDecorator
{
if (decorator is CameraDecorator)
{
CameraDecorator camDecorator = decorator as CameraDecorator;
while (camDecorator is CameraDecorator)
{
if (camDecorator is T)
{
return(camDecorator as T);
}
camDecorator = camDecorator._camera as CameraDecorator;
}
}
return(null);
}
