| [ATL] Troubles with xmiIDs, rule inheritance [message #698304] |
Tue, 19 July 2011 08:37  |
 A Vernotte
Messages: 21
Registered: June 2011 |
Junior Member |
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Hi,
I'm currently trying to perform a UML to "my UML-like metamodel" transformation. To accomplish that I need to extract xmiIDs from UML elements, and assign them to each created target element. As you may have figured out, I'm stuck.
First, as mentioned in a previous topic (eclipse.org/forums/index.php/t/210173/), it seems impossible to export xmiIDs using EMF-specific VM. Well, I found two cases where I could get them properly : either by storing them into String Attributes, or by removing every link of the element with others (for instance, my root Element "Model", has a xmiID). Those are not solutions however.
Also, I'm using rule inheritance since I have in my metamodel an abstract Element, which every other elements inherit from. While I can access xmiIDs (well, at least there is no error) with the simple assignment "__xmiID__ -> uml.__xmiID__" in any matched rule, I can't extend an abstract rule that uses this assignment because I get an error as soon as I save the ATL file :
org.eclipse.m2m.atl.engine.emfvm.VMException: Unable to access __xmiID__ on OclUndefined
at process_checkSubRules#31(ATLCompiler.atl[685:5-685:33])
local variables: self=IN!abstractElt, forEach=Sequence {IN!Package, IN!Class, IN!Operation}, subRule=IN!Operation, forEach=Sequence {IN!<unnamed>}, ipe=IN!<unnamed>
at process_matcher#188(ATLCompiler.atl[597:7-597:38])
local variables: self=IN!abstractElt, forEach=Sequence {IN!<unnamed>}, ipe=IN!<unnamed>
at process#6(ATLCompiler.atl[552:3-552:28])
local variables: self=IN!abstractElt
at process#2066(ATLCompiler.atl[463:3-463:24])
local variables: self=IN!uml2uml4tst
at main#37(ATLCompiler.atl)
I'm very new to this tool/language. Maybe I'm doing it all wrong ?
Thank you,
A. Vernotte.
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