Hi

I have a collection of data-objects in my app, I want to use these data-objects to hold certain values to keep things in the app up to date. Is this a good idea?

For example, I have a USER data-object, that can add/edit/delete records, but also contains functions that can be called by it's parent, and may also validate usernames/passwords and also hold the currently logged in userid, userlevel etc.etc.

Is this OK to do in a 3-tier environment, or should I seek another solution?

Thanks
Kev