Re: NSPredicate and related classes ?

[Sašo Kiselkov]

Quoting hns@computer.org:

> Neither...
>
> NSPredicate and NSExpression are defined in Foundation - they simply
> describe a query. They evaluate on NSObjects (NSString, NSArray,
> NSNumber, NSDictionary etc.). A reference is
> http://cocoadevcentral.com/articles/000086.php (page 14).
>
> Storage (Core Data) is not handled by Foundation. NSManagedObject* and
> NSPersistent* are part of a separate CoreData framework on MacOS X.
>
> At the moment I have not started to include anything from CoreData =>
>
http://developer.apple.com/documentation/Cocoa/Reference/CoreData_ObjC/index.html
>
> But if I would, I would use SQLite and XML since they are directly
> supported by the API (NSPersistentStoreCoordinator: NSSQLiteStoreType,
> NSXMLStoreType).
>
> -- hns
>

I'd very much like to see our efforts joined, because I'm currently developing a
free Core Data implementation (http://gscoredata.nongnu.org). Around 15000 lines
of code have been written so far and the last hurdle to overcome in the
implementation is storage of objects. Finished parts include:

 - object graph management
 - object model
 - a modelling app (DataBuilder)

Unfortunatelly, many parts are yet largely untested, so there's still quite a
lot of work to be done, but progress is inevitable :-)

--
Saso