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Is there a way to stop a running ATL transformation {and, or} return something to the launcher? [message #1220794] Fri, 13 December 2013 10:43 Go to next message
Eclipse UserFriend
Is there a way to stop a running ATL transformation {and, or} return something to the launcher?


Consider the following scenario: I am running an ATL transformation within a java code, and my ATL transformation has a rule like this:
rule haltingRule {
    from
        s: MMA!TypeA (s.name.startsWith('A'))
    to
        tempd: MMB!TypeB
    do {
        -- code to stop and return a value to the caller?
    }
}
Is it somehow possible?
Re: Is there a way to stop a running ATL transformation {and, or} return something to the launcher? [message #1220795 is a reply to message #1220794] Fri, 13 December 2013 10:47 Go to previous messageGo to next message
Eclipse UserFriend
Hello,

No, transformations are elementary units to be fully run.
The usual practice is to split your transformation into a chain of (smaller) transformations and to ask for user feedback if needed between them.
Such user feedback can be provided to the next transformation (as one of its inputs) via a simple model (considering a generic metamodel like XML for instance).
Re: Is there a way to stop a running ATL transformation {and, or} return something to the launcher? [message #1220991 is a reply to message #1220795] Mon, 16 December 2013 09:39 Go to previous message
Eclipse UserFriend
Great hint, thank you!

Basically i'm working on a simple "merge-transformation" where, given two models (IM1,IM2) conforming to the same metamodel MM, i want to produce an output model OM such that if i have two instances (of the same class) with the same name, I ask the user if he wants to merge them or not.

So the idea is to fill an XML "parameters" file with these duplicates; then iterate through each one of them asking the user if he wants to merge them, mark them in the XML itself and run the merge-transformation again.

Too much complicated? Any hints about the approach?
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