这似乎可以做到。令人讨厌的包装器数量,但它可以完成工作,而无需重复存储。
public interface ITool { }
public interface IWidget : ITool { }
public class NativeTool { }
public class NativeWidget : NativeTool { }
public class MyTool : NativeTool, ITool, INativeTool {
public MyTool() {
this.Children = new List<INativeTool>();
}
public ITool InterfacePayload { get { return this; } }
public NativeTool NativePayload { get { return this; } }
public List<INativeTool> Children { get; set; }
public NativeTool NativeChild(int index) {
return this.Children[index].NativePayload;
}
public ITool InterfaceChild(int index) {
return this.Children[index].InterfacePayload;
}
public void AddChild(MyTool child) {
this.Children.Add(child);
}
public void AddChild(MyWidget child) {
this.Children.Add(child);
}
}
public class MyWidget : NativeWidget, IWidget, INativeTool {
public ITool InterfacePayload { get { return this; } }
public NativeTool NativePayload { get { return this; } }
}
public interface INativeTool {
// the two payloads are expected to be the same object. However, the interface cannot enforce this.
NativeTool NativePayload { get; }
ITool InterfacePayload { get; }
}
public class ToolChild<TPayload>: INativeTool where TPayload : NativeTool, ITool, INativeTool {
public TPayload Payload { get; set; }
public NativeTool NativePayload {
get {return this.Payload;}
}
public ITool InterfacePayload {
get { return this.Payload; }
}
}