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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » EMF Compare Example
EMF Compare Example [message #621518] Tue, 27 October 2009 03:51 Go to next message
saad bin abid is currently offline saad bin abidFriend
Messages: 60
Registered: October 2009
Location: Ireland
Member
Hello Fellow Emf compare users,

I am very new to EMF compare and have just started with it. I have downloaded all plug-ins and started working with initial examples. which worked fine for me. But now.I am having trouble in comparing and understanding Emf merge model.

1. I am comparing two models, instances of same meta model. after executing EMF compare i get *.emfdiff file i am having same left and right elements and references to them even though i am loading both from difference directories resources (But in the same resource). same names and elements but different "hrefs" for left and right model. I am confused why is it so?

2. When i try to traverse for unmatched elements (after change by adding new elements to left model) i cannot traverse it properly? (any example available)

3. I would to solve the following scenario with emf compare
model a
model b
in the beginning both are having similar elements in them .
i am changing model "a" and than comparing it with model "b". now i want to synchronize "b" w.r.t "a" automatically. Is there anyway in EMF compare untility?

thank you very much for consideration
regards
saad
Re: EMF Compare Example [message #621519 is a reply to message #621518] Tue, 27 October 2009 08:37 Go to previous messageGo to next message
Laurent Goubet is currently offline Laurent GoubetFriend
Messages: 1893
Registered: July 2009
Senior Member
This is a multi-part message in MIME format.
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Hi saad,

comments inlined below.

Laurent

saad bin abid a écrit :
> Hello Fellow Emf compare users,
>
> I am very new to EMF compare and have just started with it. I have
> downloaded all plug-ins and started working with initial examples. which
> worked fine for me. But now.I am having trouble in comparing and
> understanding Emf merge model.
>
> 1. I am comparing two models, instances of same meta model. after
> executing EMF compare i get *.emfdiff file i am having same left and
> right elements and references to them even though i am loading both from
> difference directories resources (But in the same resource). same names
> and elements but different "hrefs" for left and right model. I am
> confused why is it so?

Don't really understand your question here. Different hrefs means the
two elements are not "the same". You're probably looking at a
MatchElement which "left" reference points to the left model and "right"
reference to the right model. These elements allow us to match similar
elements from both models, and looking at the MatchElement in "visual"
mode (in the sample ecore editor) will probably give two elements
looking really similar if you haven't changed the name of one of the two
in one of the two models.

>
> 2. When i try to traverse for unmatched elements (after change by adding
> new elements to left model) i cannot traverse it properly? (any example
> available)

Sorry, don't understand your question. What does "I cannot traverse it
properly" mean? You get an exception? How do you "traverse" your
elements : in the sample ecore editor, through code, ...? Examples of a
comparison from start to finish, merge included, can be found in the
org.eclipse.emf.compare.example.standalone example.

>
> 3. I would to solve the following scenario with emf compare
> model a
> model b
> in the beginning both are having similar elements in them .
> i am changing model "a" and than comparing it with model "b". now i want
> to synchronize "b" w.r.t "a" automatically. Is there anyway in EMF
> compare untility?

Comparing a and b is done through
DiffService.doDiff(a, b);
MatchService.doMatch(diff);

The same kind of facility is accessible for the merge through
"MergeService.merge(differences, direction)"

>
> thank you very much for consideration
> regards
> saad
>


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Re: EMF Compare Example [message #621526 is a reply to message #621518] Thu, 29 October 2009 01:36 Go to previous messageGo to next message
saad bin abid is currently offline saad bin abidFriend
Messages: 60
Registered: October 2009
Location: Ireland
Member
Hello Laurent,
I just figure out the problem. As i was using both merging and differencing at the same time so that was the reason i wasn't able to see the changes i was making and also 3 way compare better suited to solve my problem. anyhow thanks for your quick replies.

my next question is that is it possible to save merge as new file some where else on disk or serialize that as snap shot?

I want to merge file a.xml with file b.xml and save it as file c.xml on disk
regards
saad
Re: EMF Compare Example [message #621535 is a reply to message #621526] Thu, 29 October 2009 09:11 Go to previous message
Laurent Goubet is currently offline Laurent GoubetFriend
Messages: 1893
Registered: July 2009
Senior Member
This is a multi-part message in MIME format.
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Content-Type: text/plain; charset=UTF-8; format=flowed
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Hi saad,

Saving the merged file elsewhere is not possible in this order. What you
can do is copy a.xml to c.xml (so that "a.xml" is now a backup), compare
"c.xml" with "b.xml" (instead of comparing a.xml and b.xml) and merge
all changes to c.xml. That would do the trick for you would it not?

Laurent Goubet
Obeo

saad bin abid a écrit :
> Hello Laurent,
> I just figure out the problem. As i was using both merging and
> differencing at the same time so that was the reason i wasn't able to
> see the changes i was making and also 3 way compare better suited to
> solve my problem. anyhow thanks for your quick replies.
>
> my next question is that is it possible to save merge as new file some
> where else on disk or serialize that as snap shot?
>
> I want to merge file a.xml with file b.xml and save it as file c.xml on
> disk regards
> saad


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--------------060105090109060305080409--
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