CoreData Experiments?

Hi,

I was wondering some days ago if CoreData can be used in Lispworks.
xcdatamodel files need to be designed in XCode, but they can be
compiled manually with momc.
It should be possible then to initialize a ManagedObjectModel with the 
compiled  model
object file ("mom").

I'm not sure, though, what parts can stay in a nib file. Working in
Cocoa, every entity of the model corresponds to an array controller
in the nib. I'm not sure about Lispworks here.

Has anyone thought about using CoreData or done successful experiments?

thanks for sharing,

André

Re: CoreData Experiments?

On Aug 9, 2005, at Tue, Aug 9, 3:37 23 AM, André Fatton wrote:

Has anyone thought about using CoreData or done successful experiments?

I've thought about it, but have concluded that I'd prefer to use native lisp solutions such as Sven van Caekenberghe's cl-prevalance (which works well with lispworks) for persistence, and Kenny Tilton's Cells for constraints. Objective-C solutions are generally over-engineered for my tastes, and Core Data is no exception. Just reading and understanding the Core Data docs fully would take about two weeks. Contrast this with cl-prevalence which I had working well with lispworks in 15 minutes or so, including the asdf-install.

regards,

Ralph

Raffael Cavallaro, Ph.D.

raffaelcavallaro@mac.com

Re: CoreData Experiments?

On Aug 9, 2005, at 12:37 AM, André Fatton wrote:

> Hi,
>
> I was wondering some days ago if CoreData can be used in Lispworks.
> xcdatamodel files need to be designed in XCode, but they can be
> compiled manually with momc.
> It should be possible then to initialize a ManagedObjectModel with  
> the compiled  model
> object file ("mom").

I believe the answer is yes... but with some work.

I started to experiment with CoreData a few days ago. I managed to  
find 'momc', design a data model in Xcode, compile it, and load it  
(using initWithContentsOfURL:). For far so good but the more I  
started to look into CoreData, the more I felt I needed to understand  
Cocoa Binding better which then sent me to read up on Key Value  
Coding and Key Value Observing.

I'm in the process of writing some abstract (in the LispWorks sence)  
objc classes which map KVC and KVO methods to typical CLOS accessors.  
The results have been promising so far... I hope to have something  
generally useful to others at some point but I don't know when that  
will be.

-greg

_______________________________________________________
Greg Wuller                             greg@wuller.com
_______________________________________________________