Moose-dev September 2008

moose-dev@list.inf.unibe.ch

21 participants
46 discussions

Re: More metrics in Moose?
by Adrian Kuhn 26 Sep '08

26 Sep '08

> >> And how about correctness of the measured values? The class comment > >> states: "Right now only Number of MessageSends is computed in a > >> correct manner." On the first glance, I cannot see which of the > >> measured values could be wrong. Any hint on inappropriate > >> computation or improvement would be appreciated. The only thing I > >> see a bit confusing is the computation of two McCabe numbers > >> #cyclomaticNumber and #cyclomaticNumber2. Unfortunately, the class > >> comment does not tell enough. > > > > Correctness of measured values is a big issue. The correctness of > the > > numbers that Moose produces is unknown. Even such simple > measurements > > as the number of classes or method invocations might be wrong! > > I think that adrian is a bit simplifying too much. > What is the language that you want to analyse? > For Smalltalk, since the langage is dynamically typed nobody on earth > can be precise when talking about invocations! > Now for the number of classes I think that this is correct. > > Now if you take any "professional" tools you have to ask yourself Example of error range in senders: FAMIX does not model shared variables and their initializers, thus any sender in an initializer is lost. If you browse senders with VW you get them. And RBCrawler gets them as well, but filters senders by the result of a flow analysis with method scope (by doing the same abstract interpretation as RoelTyper does, as I found out later when comparing the two tools). That is, three numbers with different precision for the same metric. Example of error range in number of classes and methods: Fame uses 4 anonymous subclasses of Fame.MetaDescription to instantiate primitive descriptions. FAMIX will not model them, but Object withAllSubclasses will list them. That is, two numbers for the same metric. i.e., even something as simple as the number of classes is more than one number and thus the correct number of classes is rather a range of possible numbers. In physics error ranges are given as N+/-Err, in software analysis they could be given by making clear what has been measured and what is missing. See examples above. Of course, whether the above errors matter or not will depend on your use case. For some use cases they might be no problem, for other use cases they are critical or at least annoying. Whether you care are not also depends on your distance from source code. Consider for example a class blueprint. In smalltalk most #new methods call an #initialize method that typically creates new objects of a different type by calling #new again. Moose will thus visualize the two methods as calling each other even though any developer can tell they do not! For a consultant doing an offline analysis at 10'000 feet altitude that might be good enough, but for the developer using the tool while working at ground level the visualization must be precise or they stop using it because its results are obviously false... and this is why RBCrawler takes the whole pain of running a flow analysis, because I was eating my own dogfood :) cheers, AA

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bible code visualization / STom
by Thomas Schrader 26 Sep '08

26 Sep '08

Look, this image from The Bible got placed in the International Science and Engineering Visualization Challenge http://www.spiegel.de/fotostrecke/fotostrecke-35617-7.html The bar in the very middle must be a "God" class. Thomas -- mailto thomas.j.schrader at web de ________________________________________________________________________ Schon gehört? Bei WEB.DE gibt' s viele kostenlose Spiele: http://games.entertainment.web.de/de/entertainment/games/free/index.html

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Browse source code
by Alexandre Bergel 26 Sep '08

26 Sep '08

Dear List, When I am browsing a Java model, let's say ArgoUML, I cannot browse the source code of the model. Pressing 'Browsing source code' when right clicking on an entity seems ineffective. Is there a way to fix this? If no, I could work on this. Any hint where to start? Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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[OT] info about Metrics
by Hans N Beck 26 Sep '08

26 Sep '08

Hi, is there a good web site about oo metrics ? I need to get an overview over different metrics (independent if moose implement them or not) Greetings Hans

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Re: [Reminder] This friday, Fame sprint.
by Adrian Kuhn 25 Sep '08

25 Sep '08

We are on freenode irc://chat.freenode.net/fame-dev cheers, AA > Any way to remotely join (mostly as an observer)? > > Thanks ... Sophie > > ----- Original Message ----- > > > Dear All, > > > > this Friday, a Fame sprint will take place in Bern. > > > > Program > > - 11:00 rehearsal of Models at Runtime presentation. > > - Afterwards, happy hacking and pair programing. > > > > Links > > - http://www.iam.unibe.ch/~akuhn/d/Kuhn-2008-MRT-Fame.pdf > > - http://smallwiki.unibe.ch/fame/issues > > > > You are welcome to participate and/or attend the rehearsal. > > > > @Moose - if you have feature requests, please reply to this mail or > > add them on the wiki page! For example, I have seen that you are > > about to impl a visitor, this sounds like a nice job for Fame code > > generation. > > > > cheers, > > Adrian > > > > -- > > Adrian Kuhn > > Software Composition Group > > University of Bern, Switzerland > > http://www.iam.unibe.ch/~akuhn > > _______________________________________________ > > Moose-dev mailing list > > Moose-dev at iam.unibe.ch > > https://www.iam.unibe.ch/mailman/listinfo/moose-dev > >

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how in the script editor
by Stéphane Ducasse 25 Sep '08

25 Sep '08

can we get all the packages from a list of classes? Doru is there a way that the script does not just need a predicate and return a subset but can get a full block If I have a list of classes I would like to get a group with all the packages of the classes. So a kind of flatCollect on the result Stef

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[Reminder] This friday, Fame sprint.
by Adrian Kuhn 25 Sep '08

25 Sep '08

Dear All, this Friday, a Fame sprint will take place in Bern. Program - 11:00 rehearsal of Models at Runtime presentation. - Afterwards, happy hacking and pair programing. Links - http://www.iam.unibe.ch/~akuhn/d/Kuhn-2008-MRT-Fame.pdf - http://smallwiki.unibe.ch/fame/issues You are welcome to participate and/or attend the rehearsal. @Moose - if you have feature requests, please reply to this mail or add them on the wiki page! For example, I have seen that you are about to impl a visitor, this sounds like a nice job for Fame code generation. cheers, Adrian -- Adrian Kuhn Software Composition Group University of Bern, Switzerland http://www.iam.unibe.ch/~akuhn

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How to I get all the packages ...
by Stéphane Ducasse 25 Sep '08

25 Sep '08

Hi doru I want to go from classes to packages. But when I click on 'all classes' item and select navigation packages I get 0. is it a bug? Stef

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List of Properties
by Menanteau Jannick 22 Sep '08

22 Sep '08

Hi all, I would like to add some properties in the list "Select properties to add:" when I push "+" button. I have added this in my fonction in FamoosClass : <property: #LCOM1 longName: 'Lake of cohesion' description: 'Lake of cohesion' > but it don't appear in the list. Thanks for help Jannik

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Re: More metrics in Moose?
by Adrian Kuhn 22 Sep '08

22 Sep '08

On 22 Sep 2008, at 16:37 , Holger Guhl wrote: > The project is for company CAST that has software for software > quality assessment. I know them, that's cool! > I have a simple question: Do you have more analysis methods and > metrics that are not yet published with Moose? You can find a pre-release of (some of) my current work here http://www.iam.unibe.ch/~akuhn/d/Kuhn-2008-WCRE-SoftwareMap.pdf > And how about correctness of the measured values? The class comment > states: "Right now only Number of MessageSends is computed in a > correct manner." On the first glance, I cannot see which of the > measured values could be wrong. Any hint on inappropriate > computation or improvement would be appreciated. The only thing I > see a bit confusing is the computation of two McCabe numbers > #cyclomaticNumber and #cyclomaticNumber2. Unfortunately, the class > comment does not tell enough. Correctness of measured values is a big issue. The correctness of the numbers that Moose produces is unknown. Even such simple measurements as the number of classes or method invocations might be wrong! Why? Moose uses the FAMIX model that has the aim to be language independent, which can only be achieved at the cost of less precision. Famix is this a lossy representation of software rather than precise, think JPEG vs PNG. For that reason I suggested some time ago to add an error range to all numbers, and started to take a look at some of the numbers. That is why there are two diff McCabe measurements. As far I recall, #cyclomaticNumber2 is more correct than #cyclomaticNumber. I only looked at McCabe and found it is not correct, so I guess other measurements need careful review too. But alas, I did not have time to complete that work... cheers, AA

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Moose-dev September 2008