Igor Vaynberg wrote:
Discussing on improvements is allways good. I think we could
improve in the field of type safety, and model clarity.
However, as far as I can see, this is hard/ impossible to do
without either losing flexibility (e.g. being able to use
property models directly) or ending up with a lot of semi
duplicate models (like a property model for the normal
IModels, and a property model for ListView models). I might
have overlooked something though...
Once again, I don't understand the flexibility issue. We were not talking
about replacing the imodel interface, but the list interface, both
approaches can be wrapped in an imodel. What flexibility do you lose?
Actually, I was. Having such a nested specific interface nested would
maybe solve one problem - the problem that in some cases List isn't the
ideal interface for ListView - but I see more issues here. As one user
said last week, it wasn't immediately clear to him that ListView's
models need to return List instances. He found out not until runtime
testing it. This is where I could see space for improvement: by having a
special purpose model (e.g. like I proposed, but combined with your
suggestion it wouldn't force/ return a list but another interface, or it
would just /be/ that interface) we would enhance type safety. We could
prevent users from using models that return wrong kinds of objects. We
can't prevent that now until runtime. On top of that, there was the
discussion about whether ListView and the List interface were good matches.
Sorry if I didn't express myself too well,
Eelco
Igor
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