CODEWITHSUNDEEP
c#
Pinx0
Pinx0

Reputation: 1258

Interface implementation override type of another interface

I have an interface IArticle with several implementations: ProductType,RawMaterial,PaintType, etc.

Then I have what I consider a reference (SKU) that is a composite element between an IArticleand a Color:

public interface IReference
{
    Color Color { get; set; }
    IArticle Article { get; set; }
}

Then I have several implementations, each one has a corresponding IArticle implementation:

So the thing is... how can I override the Article type, something like this:

public class Paint: IReference
{
    public virtual Color Color { get; set; }
    public virtual PaintType Article { get; set; }
}

So that I can access PaintType specific properties instead of only being an IArticle when I'm dealing with a Paint.Article without having to cast everytime? What is wrong in this architecture?

Upvotes: 3

Views: 85

Answers (1)

Rob Lyndon
Rob Lyndon

Reputation: 12651

Generic type parameters solve this very easily.

public interface IReference<TArticle> where TArticle : IArticle
{
    Color Color { get; set; }
    TArticle Article { get; set; }
}

public class Paint : IReference<PaintType>
{
    public virtual Color Color { get; set; }
    public virtual PaintType Article { get; set; }
}

Upvotes: 7

Related Questions