Hello Kina,
Am 23.06.2017 um 12:06 schrieb
Bojarczuk, Kinga:
Hello,
I'm working on this project on e-motions files so basically
there's a .behavior file which is linked to .gcs which is
linked to .ecore file and together they represent a graph
transformation system. So what I'm trying to do is to delete
EReference from .ecore file between the object that has some
subclasses and another object. (First rule in my henshin file)
This should find a match as it exists in a server2.ecore file
however for some reason it doesn't.
To understand why the rule cannot be applied, it's crucial to know
that Henshin aims to ensure that output models of a transformation
are well-formed: in particular, it aims to ensure that rule
applications never leave behind "dangling edges". In your example
rule, since you do not specify the deletion of the containment edge
between the :EPackage and the :EReference, this edge would be left
behind as dangling, so Henshin won't apply the rule.
To make the rule applicable, it should be sufficient to specify the
deletion of the aforementioned containment edge. (Another option is
to the set the "checkDangling" attribute in the rule to "false",
however, in this case, you may lose well-formedness guarantees.)
When I run the code straight on the server2.ecore (by
starting with EPackage in my rule) file or server2.gcs (by
starting with MetamodelGD in my rule) file it works and finds
a match but when running on server3.behavior file something
suddenly prevents it from finding a match which is really
weird as .behavior file just provides a reference to the other
files so since it works when run straight on them it should
work on the the behavior file as well.
I can't find the code you mention in these statements. The zip file
only contains the models and Henshin files.
Best regards,
Daniel
The Second rule shows the solution that we thought might work
as Links in .behavior file are linked to EReferences so we
thought this might prevent deleting EReferences but it doesn't
work either.
The Third rule shows something that works but is a rather
'unclean solution' as it only deletes all the edges and
doesn't actually delete the node.
So any idea why running my rule on .behavior file suddenly
prevents it from finding a match? It seems really weird so I'd
appreciate some help. I've included a zip file with my
project.
Thank you,
Kinga
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