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Compare models structurally equal [message #1753374]

Sun, 05 February 2017 09:47

Horacio Hoyos

Messages: 210
Registered: October 2009
Location: UK

Senior Member

Hello,

I am trying to compare to models that conform to a simple PetriNet like structure: A Path has states and transitions. A Transition has a source and target State. I have attached the models and metamodel.

Visually inspecting the xmi I can tell that the structure of the models is the same, i.e. for each Transitions in model A, there is a matching Transition in model B, that is structurally equivalent. By structurally equivalent I mean that it has the same position if one follows the Path from transition to transition.

However, EMF Compare reports that the models have differences. I use a custom DefaultDiffEngine that disables ordering changes. The reason is that 1) both states and transitions are unordered collections, and 2) the order does not affect the structure.

I am missing Rolling Eyes

some flag/override method to make this comparison work?

Attachment: CompareForum.zip
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Horacio Hoyos Rodriguez
Epsilon Committer
Research Assistant
University Of York

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Re: Compare models structurally equal [message #1753435 is a reply to message #1753374]

Mon, 06 February 2017 12:45

Philip Langer

Messages: 95
Registered: March 2015
Location: Vienna, Austria

Member

Hi Horacio,

I just briefly looked at the example models you attached and I think you'll need to implement a custom matcher that knows when two states should be considered a match (i.e., they correspond to each other). I guess the transitions should be matched by name, right?

Best wishes,

Philip

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Re: Compare models structurally equal [message #1753624 is a reply to message #1753435]

Wed, 08 February 2017 09:23

Horacio Hoyos

Messages: 210
Registered: October 2009
Location: UK

Senior Member

Hi Philip,

Thanks for the reply. I was hoping for a more generalized approach... but going over the EMF Compare code I think is not as easy as one might think...

Cheers,

Horacio Hoyos Rodriguez
Epsilon Committer
Research Assistant
University Of York

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