c# - ASP.NET CORE : service design with generic objects, how can i avoid marker interface

Question

I have a design problem in my WEB API .NET CORE.

In my application users can search anything with keywords, results is a range of different business object, here a schema to explain :

We do not know what the user search and what he is looking for, we can return bank accounts, or users,... or a mixture of all type.

Model like BankAccountModel,UserModel,... are objects that are also used outside of research.

In UI, results is like thumbnail with different information depending on the type

So, for that, i have a "Marker interface" : ISearchResult ( empty interface ) to identify all "searchResult"

And my service SearchEngineService call each implementation of ISearchCriteria to get a result

     foreach (Type type in Assembly.GetExecutingAssembly()
                                       .GetTypes()
                                       .Where(mytype => mytype.GetInterfaces().Contains(typeof(ISearchCriteria))))
                {
                    var criteria = ((ISearchCriteria)ActivatorUtilities.CreateInstance(_provider, type));
 List<ISearchResult> results=criteria .GetContent(filtresMoteurRecherche.TexteRecherche)
                        //TODO return AddAll blablabla
                }

so my problem is : -How can avoid this marker interface?

-And Bonus: is this a good way to use ISearchCriteria to separate each search and scan all implementation ? (because each search can make 100+ lines of code)

thank you

question from:https://stackoverflow.com/questions/65907723/asp-net-core-service-design-with-generic-objects-how-can-i-avoid-marker-inter

Answer 1

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