11 Jul
2016
11 Jul
'16
9:44 a.m.
Hi.
On Mon, Jul 11, 2016 at 12:00 AM, Meinert Schwartau <m.schwartau(a)gmail.com>
wrote:
Hi,
I'm new to Moose and Pharo and have some problems to get started.
Welcome!
So how do you work with the moose panel?
For instance, I want to get all packages for all classes of the argouml
showcase. I do this like this:
1. Select "All classes"
MoosePanel shows shows all the entities/associations found in your model.
So, if packages are there you should also see "All Packages" group. If you
do not see the group in the list, your parser didn't identify them (create
them in the model).
2. Look in the Meta-Panel which methods are available
3. Enter "self allPackages" in evaluator and execute "Do it and Go"
4. => The result shows 0
The same for allModelPackages.
I wonder what's the difference between allPackages
and allModelPackages
and why both return a result of zero.
When parsing a program, a parser finds some symbols and their definitions
in the code. However, the definitions for all the symbols might not be
available. For example, your program call a method foo but we do not have
the source code of foo. In that case, this method becomes a stub. All
queries of type allModelEntityName return a list of non-stub entities.
allPackages should return all the packages (stub/non-stub identified in the
program). If they both return 0, I suspect there are no packages in the
model.
I would expect to get of all the packages the classes
are in.
Try doing something like this on model: self allModelClasses collect:
#parentPackage. If the list is empty, the parser didn't create packages in
the model since allModelPackages returns empty collection.
If I do the same for the methods:
1. Select "All classes"
2. Look in the Meta-Panel which methods are available
3. Enter "self allMethods" in evaluator and execute "Do it and Go"
4. => The result shows 23k methods
5. Now I wanted to look at meta panel which methods are available but I
don't see any method related except averageNumberOfInvocations and so on.
The reason seems to be that the result is of type FAMIXMethodGroup. How to
get from the group to the model for the methods so that I can access the
parameter list of the methods and so on?
FAMIXMethodGroup inherits from MooseAbstractGroup that contains an entity
collection and provide methods to iterate over individual elements. I would
send this message to the group to collect all parameters: self collect:
#parameters
So how do you know which methods you can call, do you use the meta panel
as well?
Yes, + class hierarchy.
Why do some methods return an empty result (like
allPackages) even though
they seem to be valid and should return a result?
If there are no packages in the model, the result is valid.
How to get to the content of a group?
self entityStorage. But you rarely want to do it. Instead you iterate over
the entities.
Is there a more efficient way to work with moose or is
this the way you
work with it? How do you investigate these problems if you get some
unreasonable return result?
Mostly in MoosePanel + debugger to see entities and the connections of
individual elements.
HTH.
Usman
Best regards
Meinert
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