Re: [Pyobjc-dev] Problems implementing a protocol

[Mani G. <ma...@tu...>]

Hello,

Here is an XCode project that reproduces the issue. Thank you.

Mani

On Fri, Feb 19, 2010 at 1:54 PM, Mani Ghasemlou <ma...@tu...> wrote:
> Hello,
>
> This may or may not be a bridge bug, but either way I'll post it here
> and hopefully someone will be able to help.
>
> I am implementing a Python class (note: not a subclass of NSObject)
> that fulfills the ISyncSessionDriverDataSource protocol
> (http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Reference/ISyncSessionDriverDataSource_Protocol/Reference/Reference.html).
>
> With this implementation passed in to the session driver, I've
> confirmed that functions in my class returning various Cocoa objects
> (NSDictionary, NSArray, NSURL) are being invoked and handled
> correctly.
>
> However, I am stuck on the preferredSyncModeForEntityName_()
> implementation. It is supposed to return type ISyncSessionDriverMode
> (http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Reference/ISyncSessionDriverDataSource_Protocol/Reference/Reference.html#//apple_ref/doc/c_ref/ISyncSessionDriverMode),
> an enum.
>
> My code simply returns an enum value:
>
>    def preferredSyncModeForEntityName_(self, entity):
>        logging.debug('DRIVER requesting preferred sync mode')
>        if self.refresh is True:
>            logging.debug('returning ' + str(ISyncSessionDriverModeRefresh))
>            return ISyncSessionDriverModeRefresh
>        else:
>            logging.debug('returning '+ str(ISyncSessionDriverModeFast))
>            return ISyncSessionDriverModeFast
>
> From my understanding of both the documentation and the way PyObjC
> works, the above should just work, right? However it doesnt:
>
> 2010-02-19 13:29:46,908 DEBUG
> SyncDataSource.preferredSyncModeForEntityName_: DRIVER requesting
> preferred sync mode
> 2010-02-19 13:29:46,908 DEBUG
> SyncDataSource.preferredSyncModeForEntityName_: returning 1
> ISyncSessionDriverDataSource <SyncDataSource.SyncDataSource object at
> 0x27ae070> responded poorly to preferredSyncModeForEntityName: with
> entity com.apple.calendars.Attendee
>
> Any ideas what could be wrong here? I have tried all of the enum
> values just to see if there's something wrong with my logic, but they
> all return the same error. This leads me to think that
> ISyncSessionDriver is not happy with the integer format used to return
> this enum value. Or maybe I'm just missing something obvious?
>
> Any help greatly appreciated!
>
> (OS X 10.5.8, standard system PyObjC installation: 2.0)
>
> Regards,
> Mani
>



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Mani Ghasemlou, Team Lead, Tungle
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