20 Jan
2011
20 Jan
'11
6:59 p.m.
So first thing: the metrics implemented by Andre are
used to do automatic re-structuring of classes into packages as Alex said.
But they are only the metrics, you need an algorithm to do the actual regrouping of class
in packages. The algorithms uses the metrics to know what classes are "closer"
one to the other.
Without this algorithm (not very difficult to implement) there is always the possibility
to use the metrics as quality metrics for existing packages.
However I would be cautious about that.
Actually, I started to implement them (and Andre took the flag recently) to experiment
more formaly their real interest.
Cool! I would be interested to see this.
My impression is, actually, that they are not that
much interesting for this purpose, that people do not really group classes based on
cohesion/couopling considerations, but rather or higher level consideration (like all UI
goes there, and all security code goes there, ...)
This is what happen most of the time. You may see a strong coupling between Seaside and
Pier, but they live in different packages. And you have JComponent and JButton both in
Swing, while JComponent does not reference JButton that much.
BTW, jannik did a related work with DSM, except he was
looking at cycles, i.e. he used another metric.
Which metric?
Cheers
Alexandre
----- Mail original -----
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Alexandre Bergel http://www.bergel.eu
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De: "Simon Denier"
<simon.denier(a)gmail.com>
À: "Moose-related development" <moose-dev(a)iam.unibe.ch>
Envoyé: Jeudi 20 Janvier 2011 10:03:45
Objet: [Moose-dev] Re: bunch cohesion and coupling
On 19 janv. 2011, at 23:13, Alexandre Bergel wrote:
They certainly would be better according to the metrics they use for
clustering :)
I guess that Nicolas has more than one idea about what to do with this
work...
--
Simon Denier
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Moose-dev(a)iam.unibe.ch
https://www.iam.unibe.ch/mailman/listinfo/moose-dev >> Bunch: A Clustering Tool for the Recovery
and Maintenance of
>> Software System Structures
>> (http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=792498)
They provide ways to assess the quality of a modularization (Figure
1). There are some automatic partition of dependent C files.
I would be curious to see if what their clustering algo says about
the modularization of our tools. Will they provide a better
distribution of classes among the packages (which I doubt).