Re: [mdr-users] Clustering extents managed by non-MDR repositories

Would we open Pandora's box by trying to pass our own implementation
of RefPackage that also implements BaseObjectHandler (and wraps the
MagicDraw model elements) when creating an extent?

This seems feasible when we only have to override a couple of methods
(like refMetaObject())... Do you know of other assumptions about
RefPackage in this context?

Thanks a lot in advance,
Pieter

On 2/15/06, Martin Matula <[email protected]> wrote:
> Hi Pieter,
> this is a limitation of MDR.
> Martin
>
> Pieter Van Gorp wrote:
> > Hi all,
> > is it possible to cluster extents managed by non-MDR repositories?
> >
> > More specifically, we're trying to create a cluster of the UML extent
> > in MagicDraw 10.  If you look at the interfaces of MagicDraw and MDR,
> > everything seems fine.  However, we've just encountered a class cast
> > exception on line 752 of NBMDRepositoryImpl, which contains:
> > Object result =3D
> > packages.put(((BaseObjectHandler)pkg.refMetaObject())._getDelegate().ge=
tMofId(),
> > pkg);
> >
> > This raises:
> > java.lang.ClassCastException: com.io_software.catools.tas.mof.model.Pac=
kageImpl
> >       at org.netbeans.mdr.NBMDRepositoryImpl.collectPackageInstances(NB=
MDRepositoryImpl.java:752)
> >       at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositor=
yImpl.java:466)
> >       at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositor=
yImpl.java:292)
> >       at org.segravis.icons.helper.Driver.loadClusteringExtent(Driver.j=
ava:196)
> >
> > Reading the source, it seems like our MDR/MagicDraw integration will
> > not work since  the MagicDraw classes do not implement internal MDR
> > classes like BaseObjectHandler.  Is this a fundamental limitation of
> > MDR or are we overlooking something?
> >
> > Note that we've passed MagicDraw's repository as the single element of
> > the RefPackage array argument to createExtent.  On a type level,
> > that's OK but it's at the dynamic type cast that things go wrong...
> >
> > Thanks in advance,
> > --
> > Pieter Van Gorp
> >        Teaching and Research Assistant
> >        FOrmal Techniques in Software engineering (FOTS)
> >        University of Antwerp
> >        Middelheimlaan 1
> >        2020 Antwerpen - Belgium
> >        Office: G.304
> >        Phone: +32 3 265 38 71
> >        Fax: +32 3 265 37 77
> >        http://www.fots.ua.ac.be/~pvgorp/research/
> >        http://motmot.sourceforge.net/
> >
> > ``A man has to live with himself, and he should see to it that he
> > always has good company [Charles Evans Hughes]''
>