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[EMF Compare]comparison of a copied model shows differences in data types [message #532386]

Sun, 09 May 2010 13:04

Jan Reimann

Messages: 140
Registered: July 2009

Senior Member

Hello NG,
I make a copy of my original model with the following code:

Copier copier = new Copier(false, false);
List<EObject> originalElements = new LinkedList<EObject>();
originalElements.add(originalModel);
copier.copyAll(originalElements);
copier.copyReferences();
EObject copiedModel = copier.get(originalModel);

Then I invoke some modifications on the copy and display a comparison
dialog between original and copy. I observed a very strange thing which
I want to solve. Imagine that original and copy is an ecore model. The
strange thing now is that elements which belong together and are still
the same (except of being duplicates) are surrounded by a blue line
expressing they are similar but differ in some way. When I then opend
the properties tab in the compare dialog I saw the reason: the copied
model doesn't reference the original data types, such as EDouble,
EString ...., anymore. And that's why the comparison assumes that they
have differences. But why are those references to the data types broken?
I understand that those data types can't be copied but the references
should hold in the copy as well. Any suggestions?

best regards,
Jan

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Re: [EMF Compare]comparison of a copied model shows differences in data types [message #532399 is a reply to message #532386]

Sun, 09 May 2010 17:05

Ed Merks

Messages: 33133
Registered: July 2009

Senior Member

Jan,

It sounds like you don't really want the second argument to the Copier
to be false.

Jan Reimann wrote:
> Hello NG,
> I make a copy of my original model with the following code:
>
> Copier copier = new Copier(false, false);
> List<EObject> originalElements = new LinkedList<EObject>();
> originalElements.add(originalModel);
> copier.copyAll(originalElements);
> copier.copyReferences();
> EObject copiedModel = copier.get(originalModel);
>
> Then I invoke some modifications on the copy and display a comparison
> dialog between original and copy. I observed a very strange thing which
> I want to solve. Imagine that original and copy is an ecore model. The
> strange thing now is that elements which belong together and are still
> the same (except of being duplicates) are surrounded by a blue line
> expressing they are similar but differ in some way. When I then opend
> the properties tab in the compare dialog I saw the reason: the copied
> model doesn't reference the original data types, such as EDouble,
> EString ...., anymore. And that's why the comparison assumes that they
> have differences. But why are those references to the data types broken?
> I understand that those data types can't be copied but the references
> should hold in the copy as well. Any suggestions?
>
> best regards,
> Jan
>

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: [EMF Compare]comparison of a copied model shows differences in data types [message #532420 is a reply to message #532399]

Sun, 09 May 2010 19:56

Jan Reimann

Messages: 140
Registered: July 2009

Senior Member

Hi Ed,
> It sounds like you don't really want the second argument to the Copier
> to be false.
Thanks Ed. This solved the problem. I thought this argument has to do
with the own internal references and that they should be copied, too.
Well, but this will be achieved by copier.copyReferences() of course.

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