[news.eclipse.modeling.m2m] Re: [QVTO]string operations and blackboxes

[Adolfo SÃnchez-Barbudo Herrera <adolfosbh@xxxxxxxxxxxxxxxx>]

Hi Radek,

I have recently started (again ÂÂ!! ) a discussion in the OCL newsgroup 
about the OCL and QVTo standard libraries. I precisely named you and 
colleagues to join it ;).

Since there isn't too many people working around this. It could be 
interesting having several points of view, and try to align them to 
improve the OMG specification... Oh they seem Ken's word ;P.

I'm glad that you a have added the Std Lib to the CVS. I'll have to 
download your code to contrast it with my approach ;).

Cheers,
Adolfo.

Radek Dvorak escribiÃ:
> Hi Cesar,
>
> We have already implemented complete String operatons set according to 
> the spec.
> But it was committed after M6, which you are apparently using.
> We will produce integration build this week, so you could make use of it.
>
> Anyway, once the QVT standard library does not implement all you want, 
> you have to blackbox it.
> There was already mentioned meachism in this newsgroup -
> see '[QVTO] Adding custom operations for primitive data types' topic.
>
> This is an old way of blackboxing (came from Borland initial 
> contribution), we
> plan to generate java skeletons from QVT operations headers.
>
> So far, there is a helper String library available in QVTO, you access 
> it like this
>
>     import library Strings;
>
> but most of its routine have been implemented in StdLib already.
>
>
> Regards,
> /Radek
>
> On Thu, 24 Apr 2008 00:42:32 +0200, kaiserlautern 
> <comouraf-lixo@xxxxxxxx> wrote:
>
> > Hi,
> >
> > I have strings like a<K->1,T->T1> and would like to separate 
> > parameters (in this example, K and T) from their values (1 and T1). 
> > Apparently, QVTO implements just a fraction of the string operations 
> > proposed in the spec, making it very difficult (if possible at all) to 
> > "tokenize" strings. So, is this a typical case for blackboxes? If so, 
> > how to implement them? Is there any particularity or all I have to 
> > write is a plain (java?) class implementing only the interface 
> > declared in the qvt file? Where to put my classes?
> >
> > Thanks,
> >
> > CÃsar