[Moose-dev] Re: About model level metrics

On 12/09/2017 11:58, Stéphane Ducasse wrote: Hi for certain metrics we need to compute the total amount of lines of code for the complete project. FAMIXClass >> calculateARLCOMUnderstand "Class LCOM LOC C1 12 1000 C2 2 50 For C1 1000/1050 * 12 For C2 50/1050 * 2 " self halt. ^ self TR_LoC / self mooseModel TR_totalNumberOfLinesOfCode * self TR_LCOM Now I have a question because totalNumberOfLinesOfCode does exist on Model but on TypeGroup I wrote it like that on FAMIXTypeGroup TR_totalNumberOfLinesOfCode <MSEProperty: #TR_totalNumberOfLinesOfCode type: #Number> <derived> <MSEComment: 'Total number of lines of code from Understand'> ^ self lookUpPropertyNamed: #TR_totalNumberOfLinesOfCode computedAs: [ (self sumNumbers: [ :each | each TR_LoC ]) asFloat ] How can I access for example totalNumberOfLinesOfCode at the model level? We had the problem at Synectique and it is a complex issue (and no, we did not find a satisfactory solution)

For LOC specifically, in Smalltalk your solution can work, but not in Java, since classes and methods can contain inner/anonymous classes and you don't want to count them twice The problem also exist in Ada (not with classes) Second, there is also the larger problem of aggregation of a metric at some higher abstraction level - some times you want to sum (e.g. LOC) ; - sometimes it seems more reasonable to average (e.g. cyclomatic complexity at the level of classes) ; - sometimes you want to recompute (e.g. coupling between 2 classes can often not be aggregated from the results of couplings between their methods) ; - and also averaging is not always a good solution in itself and you want something more sophisticated (http://dx.doi.org/10.1002/smr.1558) nicolas -- Nicolas Anquetil -- MCF (HDR) Project-Team RMod _______________________________________________ Moose-dev mailing list Moose-dev(a)list.inf.unibe.ch https://www.list.inf.unibe.ch/listinfo/moose-dev