Re: [Dltk-dev] // XXX: what if multiple extensions define a selector

[Gabriel Petrovay <gabipetrovay@xxxxxxxxx>]

Do you know projects that use multiple parsers in this way? If no, I
would eliminate the selector until it is requested by users. The
IProject in the patch from me that you committed today is used only
for the logic of the selectors.

But again, I would leave it without selector just like
sourceElementParsers. There is no selector there. Probably (I didn't
check), only the priority plays a role there.

I see that it is not an easy part to reason about. It also gave me
some headaches.


Gabriel

On Wed, Feb 3, 2010 at 4:54 PM, Alex Panchenko <alex@xxxxxxxxx> wrote:
> The problem is that at the moment selector is contributed by the same
> extension point.
> So, theoretically, a few selectors could be contributed. And it becomes
> unclear which selector would be called.
> Another way to solve the issue: not to contribute selector by the extension
> point, and hard code it in java, in the appropriate xxxExtensionManager
> class.
> ----- Original Message -----
> From: "Jae Gangemi" <jgangemi@xxxxxxxxx>
> To: "DLTK Developer Discussions" <dltk-dev@xxxxxxxxxxx>
> Sent: Wednesday, February 3, 2010 9:47:00 PM GMT +06:00 Almaty, Novosibirsk
> Subject: Re: [Dltk-dev] // XXX: what if multiple extensions define a
> selector
>
>
>   i realize i've been out of the game for a while, but if memory serves, the
> selector is what allows for the drop down list to occur and extensions are
> supposed to provide an implementation of the drop down item.
>
>  isn't this something that could just happen in general, where any extension
> could define an implementation and over write something that already exists
> in the 'core'? it seems this should be one of those 'design by contract'
> things, which means just don't do it. :)
>
> On Wed, Feb 3, 2010 at 10:33 AM, Alex Panchenko <alex@xxxxxxxxx> wrote:
>>
>> Hi Gabriel,
>>
>> I remember that discussion, but I am not sure what is the best choice
>> here.
>> I can suggest logging extra selectors to the error log.
>> What do you think? Do you have any other ideas?
>>
>> Regards,
>> Alex
>>
>> ----- Original Message -----
>> From: "Gabriel Petrovay" <gabipetrovay@xxxxxxxxx>
>> To: "dltk-dev" <dltk-dev@xxxxxxxxxxx>
>> Sent: Wednesday, February 3, 2010 9:13:37 PM GMT +06:00 Almaty,
>> Novosibirsk
>> Subject: Re: Re: [Dltk-dev] // XXX: what if multiple extensions define a
>>  selector
>>
>> Hi,
>>
>> There was this unanswered post:
>> http://dev.eclipse.org/mhonarc/lists/dltk-dev/msg01792.html
>>
>> Are there any plans in this direction?
>>
>>
>> Thanks!
>>
>> Gabriel
>>
>>
>>
>> --
>> MSc Gabriel Petrovay
>> Mobile: +41(0)787978034
>> www.28msec.com
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>
>
>
> --
> -jae
>
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-- 
MSc Gabriel Petrovay
Mobile: +41(0)787978034
www.28msec.com