Re: Extension of CoreData to third party databases.
Re: Extension of CoreData to third party databases.
- Subject: Re: Extension of CoreData to third party databases.
- From: Bill Bumgarner <email@hidden>
- Date: Tue, 29 Nov 2005 13:18:01 -0800
On Nov 29, 2005, at 12:37 PM, Ruslan Zasukhin wrote:
You say this like a miracle.
All normal dbs have many data types.
Nothing of the sort. You have misconstrued my words to be some kind
of comparison between SQLite and Valentina. That was certainly not
my intention; my intention was to correct the misinformation in
regards to SQLite. From what I gather Valentina is a wonderful
product -- congratulations on that -- but I do not have any depth of
knowledge regarding Valentina and I'm not about to comment on the
implementation details of something I have never seen.
On 11/29/05 9:38 PM, "Bill Bumgarner" <email@hidden> wrote:
It is more interesting discuss technical aspects of Core Data model.
What have excite me, is that I have read that CoreData is designed
without
thinking about some particular db, and wow, without thinking only
about
relational model.
That is correct. Core Data is a storage agnostic solution for
managing object graphs in Cocoa applications (GUI or non-GUI). The
persistency side is designed to be opaque beyond basic file format
decisions (XML -- fat and parseable, binary -- relative fast and
atomic, SQL -- scalable and non-atomic).
The real power of Core Data is in the change management, from KVC/KVO
through to validation and tight integration with Cocoa Bindings and
Controllers.
So this excite me, because Valentina have Object-Relational model.
(Assuming the Store API were to be made public)
That may be helpful or it may prove to be a hindrance; it all
depends on the level of impedance mismatch between the two ORM
mechanisms.
Please file an enhancement request via bugreport.apple.com giving
technical details as to how such an integration might be done from
the perspective of Valentina. It will come back as a dupe as many
developers have asked for access to external databases, but the Core
Data team will definitely appreciate your product's unique
perspective.
Okay, so it looks, up to know, not exists any third party solution
for Core Data?
The persistent store API is not public at this time.
I'm not aware of anyone having hacked up some other kind of a store
at this time, but nothing surprises me from this community. :-)
...
Up to know, CoreData texts sounds to me like some tool which
simplify for
__application__developer__ work with prefs, persistence of objects
like size
and location of windows and so on.
Core Data is designed to be the primary data store for application
data; for document data or user data. In Xcode, Cocoa templates
are provided that create both document based and non-document based
(ala Address Book) Core Data backed applications.
If you would like a historical perspective, go and read the
documentation for Enterprise Objects. Core Data was very much
inspired by Enterprise Objects with the key difference being a focus
on keeping Core Data as simple as possible while maintaining enough
flexibility to actually be useful.
b.bum
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden