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[EMFCompare] Comparison of unordered lists [message #691403]

Fri, 01 July 2011 11:23

Timothy Marc

Messages: 547
Registered: July 2009

Senior Member

Hi all,

a beginner's question regarding EMFcompare and unordered, multi-valued
features. So, would EMFcompare consider two unordered list as equal/identic,
if the indices of the contained objects are arbitrary? If not, what would be
the best option to detect such (non-semantic) differences?

Sorry if this is technically too superficial, but I'm not aware with the
precise architecture of EMFcompare.

Best Regards,
Timothy

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Re: [EMFCompare] Comparison of unordered lists [message #691408 is a reply to message #691403]

Fri, 01 July 2011 11:49

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi Timothy

If you want a meta-model with changed semantics use one.

Perhaps you can dynamically modify the meta-model in memory before
invoking EMF compare.
Perhaps you can arrange for the RersourceSet Resource loader to load the
modified meta-model.
Pwerhaps you can modify your models to reference an alternate modifoed
meta-model.
Perhaps you can modify the persistent master copy of the meta-model.

Regards

Ed Willink

On 01/07/2011 13:23, Timothy Marc wrote:
> Hi all,
>
> a beginner's question regarding EMFcompare and unordered, multi-valued
> features. So, would EMFcompare consider two unordered list as
> equal/identic, if the indices of the contained objects are arbitrary?
> If not, what would be the best option to detect such (non-semantic)
> differences?
>
> Sorry if this is technically too superficial, but I'm not aware with
> the precise architecture of EMFcompare.
>
> Best Regards,
> Timothy

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Re: [EMFCompare] Comparison of unordered lists [message #698335 is a reply to message #691408]

Tue, 19 July 2011 09:34

Laurent Goubet

Messages: 1902
Registered: July 2009

Senior Member

Hi Timothy,

EMF Compare will handle "unordered" lists as such : no "order" differences will be reported. On the opposite, if the list is "ordered", it will detect and report ordering changes.

If you wish to detect order changes on unordered lists, you'll have to customize the DiffEngine of EMF Compare.

Laurent Goubet
Obeo

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Re: [EMFCompare] Comparison of unordered lists [message #700121 is a reply to message #698335]

Fri, 22 July 2011 21:07

Timothy Marc

Messages: 547
Registered: July 2009

Senior Member

Hi Laurent,

wow, that's great. It seems as EMFcompare can really be used for testing
whether the outcome of a M2M is semantically equivalent - I was really
uncertain of the hanlding of unordered lists.

Thanks a lot for your belated but useful answer.

Timothy

"Laurent Goubet" schrieb im Newsbeitrag
news:j03ift$g0b$1@news.eclipse.org...

Hi Timothy,

EMF Compare will handle "unordered" lists as such : no "order" differences
will be reported. On the opposite, if the list is "ordered", it will detect
and report ordering changes.

If you wish to detect order changes on unordered lists, you'll have to
customize the DiffEngine of EMF Compare.

Laurent Goubet
Obeo

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