Re: Comparing two models for differences

Holger Krug <[email protected]> Tue, 23 Jul 2002 11:32:38 +0200

Newsgroups	gmane.comp.java.netbeans.modules.mdr.devel
Message-ID	<[email protected]>

On Tue, Jul 23, 2002 at 11:21:48AM +0200, Martin Matula wrote:
> For some usecases it could be also better to use "metamodel-based diff", 
> which is a utility that operates on MDR directly rather than on XMI 
> files and compares two different datastructures using their metamodel. 
> One of my students developed such a module for NetBeans as part of his 
> master thesis. Hopefuly he will contribute it soon.

Martin, it seems you have clever students. Could your student suggest
to add something like metamodel-based "equals(other)" and "hashCode()"
methods. Two models are equal when there diff is empty and the hash
codes of equal models is equal ?! `equals' should be trivial,
`hashCode' would be somehow more involved, but it should be possible
to rely on the hash codes of Java collections ?!

-- 
Holger Krug
[email protected]