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

["Radek Dvorak" <radek.dvorak@xxxxxxxxxxx>]

Hi CÃsar,

The String operations using positions are 1 based, as well as with  
collections.
The strange log record you can see is caused by 0 index at

	self.name.substring(0,self.name.indexOf('<'))

so this call results in OclInvalid instance, as it can't give any result.

But you have made a good point, we have to log it meaningfully ;-)

/Radek


On Thu, 24 Apr 2008 12:22:13 +0200, kaiserlautern <comouraf-lixo@xxxxxxxx>  
wrote:

> Thanks, Radek,
>
> Maybe I'm gonna wait for the integration build. Using the library, I got  
> strange things, like:
>
> log(self.name);    => prints out:  b<k->1>
>
> log(self.name.substring(0,self.name.indexOf('<'))) => prints out:  
> org.eclipse.emf.ecore.impl.DynamicEObjectImpl@f2869f (eClass:  
> org.eclipse.emf.ecore.impl.EClassImpl@64419f (name: Invalid_Class)  
> (instanceClassName: null) (abstract: false, interface: false))
>
> Is it something I missed? I just added the import library Strings to the  
> transformation.
>
> CÃsar
>
> "Radek Dvorak" <radek.dvorak@xxxxxxxxxxx> a Ãcrit dans le message de  
> news:op.t927bqovhj1a1g@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > 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
> >
> >
> >
> > -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/



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