Home/ Questions/Q 1006121
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-16T08:24:27+00:00

Assuming a standard 3-tier application (UI – Domain – Data), should the Domain Layer

  • 0

Assuming a “standard” 3-tier application (UI – Domain – Data), should the Domain Layer show to the UI classes originally defined in the Data Layer?

I mean, assuming there’s a Product class defined in the Data Layer, is it wrong to make some method from my Domain Layer have methods returning it (this is, making them visible to the UI)? Or should I define in the Domain Layer itself some class that wraps the Product from the Data Layer, so the UI now doesn’t depend on the Data Layer?

Thanks

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    This kind of implementation binds the UI classes to data classes which generally is harmful. A better practice in all known scenario is to keep them separate. This will not only decouple them from each other but also give you the freedom to insert custom logic (anytime in future) between UI classes and data classes. It also gives you freedom to do customizations to data object without affecting the UI classes directly.

    • 0