[news.eclipse.technology.emft] Re: [EMF Compare] Similarity in ordered l

[gch@xxxxxxxxxxxxxx (Guillaume Chatelet)]

Ok, looking closer to the code, I understood I had to write my own 
MatchEngine (extending from GenericMatchEngine) and override the 
GenericMatchEngine#isSimilar(EObject obj1, EObject obj2) function.

Guillaume Chatelet wrote:

> Hello Laurent,

> I'd like to compare two objects, say o1 and o2. Those objects contain an 
> EList<IMyObject>.

> The compare is pretty difficult because the lists might be shuffled and 
> the object might change a lot.

> In order for the diff ordering to be efficient I need rules to ensure that 
> two IMyObject are similar. Otherwise the diff algorithm will conclude with 
> a lot of additions and deletions in the list. So I need to precise what 
> makes two IMyObject similar or not. I already played with 
> ReferencesCheck#shouldBeIgnored(EReference) and 
> AttributesCheck#shouldBeIgnored(EAttribute) as you proposed but it's not 
> enough. I need to compute intermediate metrics and maybe to give some 
> attributes more importance than others.

> Do you think this is something that fits in EMF Compare's framework ? How 
> can I do this ?

> Best regards,
> Guillaume