26 Oct
2010
26 Oct
'10
2:57 p.m.
Hi,
On 26 Oct 2010, at 14:47, Fabrizio Perin wrote:
Hi all,
i was looking at the model and i was wondering why the method annotationInstaces is
defined into FAMIXEntity. I think that it should be defined into FAMIXSourcedEntity
otherwise i can ask to a FAMIXAnnotationInstance which are its annotationInstances that is
kind o weird because as far as i know you cannot annotate an annotation or can you do
that?
This kind of things are always a problem with single inheritance. In this case, I cannot
think of a case in which we can annotate other entities except sourced entities. So, it
should indeed be fine to move the property down into FAMIXSourcedEntity.
Moreover in which sense annotationInstances is
derived? I mean if i have an entity how can i calculate the annotaton instances without
accessing the model directly?
derived means it can be derived from another piece of information. When you have a
bi-directional association, derived most always means that it can be derived from the
other end of the association. Typically, when we have a 1-to-n association, we mark the n
end with derived. In this case FAMIXAnnotationInstance>>annotatedEntity is not
derived, but FAMIXEntity>>annotationInstances is derived.
Cheers,
Doru
Cheers,
Fabrizio
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