[news.eclipse.modeling.m2m] Re: [QVTO] Question about intermediate prope

[Toñi Reina Quintero <reinaqu@xxxxxxxxx>]

Hi Sergey,

 I have just downloaded the new Eclipse Galileo and, as a consequence, 
qvto 2.0.0. And I have no compilation problems, so as you have found 
out, intermediate properties are legal with 2.0.0.

 Furthermore, the same piece of code works perfectly with 2.0.0, so I 
suppose the qvto 1.0.1 engine must have some implementation error that 
have been solved in 2.0.0.

 Thanks for all,
	Toñi

Sergey Boyko escribió:
> Hi Toñi ,
>
> I was wrong in telling that it's illegal to define intermediate property 
> on modeltypes. I've mixed it with transformation parameter.
>
> I checked similar sample (with 2.0.0 qvto version) and it works:
>
> modeltype ecore uses "http://www.eclipse.org/emf/2002/Ecore";;
> transformation NewTransformation(in inModel : ecore);
> intermediate property ecore::nodesMainNav : OrderedSet(EClassifier);
>
> main() {
>     inModel.nodesMainNav := getMainNavigationArea().eClassifiers;
>     log('1..Num nodos', inModel.nodesMainNav->size());
> }
> query getMainNavigationArea() : EPackage {
>     return inModel.rootObjects()![EPackage];
> }
>
>
>
> Sergey Boyko wrote:
> > Hi Toñi ,
> >
> > Some replies are in-lined, below
> >
> > Regards,
> >   Sergey
> >
> > Toñi Reina Quintero wrote:
> > > Hello everybody,
> > >
> > >     Although I have said in the subject the question is about 
> > > intermediate properties, I'm not sure if it has to do with them or 
> > > with OrderedSet assignments.
> > >
> > >     I have defined a intermediate property called nodesMainNav. This 
> > > property is an Ordered Set of Nodes.
> > >
> > >         In the transformation entry point I'm trying to fill in the 
> > > Ordered Set. For that, I executed a query named 
> > > getMainNavigationArea, that returns an Area, and as an Area is 
> > > composed of a set of Nodes, I use the relation nodes to extract all 
> > > the nodes of the area. As it can be seen in the piece of code I show 
> > > below.
> > >
> > >
> > > intermediate property siteMap::nodesMainNav : OrderedSet(siteMap::Node);
> > >
> > >
> > > main() {
> > >         inModel.nodesMainNav := getMainNavigationArea().nodes;
> > >         log('1..Num nodos',inModel.nodesMainNav->size());       
> > > inModel.rootObjects()[siteMap::Sitemap]->map toWebSite();
> > >     }
> >
> > As far as I understand you've defined property 'nodesMainNav' on 
> > modeltype 'siteMap'.
> > I presume that transformation your signature looks like:
> >   transformation NewTransformation(in inModel : siteMap);
> >
> > Actually it's not legal to define intermediate property on modeltypes. 
> > Current qvto version (2.0.0) prohibits that.
> > In case you need global property you might define it like follows:
> >   property nodesMainNav : OrderedSet(EClass) = OrderedSet{};
> >
> > In case that doesn't help we'll go farther with the example code.
> > However I don't see any issues with assignment itself.
> >
> > As I answered your posts in amalgam newsgroup I saw that you use old 
> > 1.0.1 version. I suggest you to start using 2.0.0 release.
> >
> > > My problem is that the log sentence that appears as '1..Num nodos' 
> > > shows the number of nodes in the OrderedSet is 0. However, I have 
> > > written a similar log sentence inside the getMainNavigationArea 
> > > query, and the result is that there are 8 nodes in the Area.
> > >
> > > My question is: why does the OrderedSet seem to be without any nodes 
> > > outside the query? Is this related to the intermediate property or is 
> > > something related to the assignment?
> > >
> > > Best regards,
> > >     Toñi