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[ATL] Mixed types collection operations [message #93360]

Tue, 28 October 2008 06:06

Eclipse User

Hi,
i have a little problem when using a collection with mixed types inside.
For instance, i have a collection (that is the UML2
package.packagedElement collection) that contains uml2 classes, packages,
associations and other stuff...

The problem is thet i want to write this:

myPublicMemoryTypes: distinct AAXL!MemoryType
foreach (e in s.packagedElement->select(h | h.oclIsTypeOf(UML2!Class)
and
h.isAbstract=true and h.visibility=#public ) (
name <- e.name
)

The problem here is when the iterator "h" is a package i get this error
:"isAbstract does not exist on UML2!Package" !

So i want to test on isAbstract only when the type is a UML2!Class.
Does anybody have an idea of how to do such things?!!

Re: [ATL] Mixed types collection operations [message #93382 is a reply to message #93360]

Tue, 28 October 2008 06:48

Eclipse User

Skander,

Suggestion below. However, this feels like you should have a rule
for dealing with classes and other rules for the different types of
packaged elements (each rule needs the appropriate guard
condition).

Andy.

"Skander " <skander.turki@gmail.com> wrote in message
news:ca7f59a660579de39852492ee6216b55$1@www.eclipse.org...
> Hi,
> i have a little problem when using a collection with mixed types inside.
> For instance, i have a collection (that is the UML2
> package.packagedElement collection) that contains uml2 classes, packages,
> associations and other stuff...
>
> The problem is thet i want to write this:
>
> myPublicMemoryTypes: distinct AAXL!MemoryType foreach (e in
> s.packagedElement->select(h | h.oclIsTypeOf(UML2!Class) and
> h.isAbstract=true and h.visibility=#public ) (
> name <- e.name
> )
>

foreach(e in s.packagedElement->select(h | if h.oclIsTypeOf(UML!Class then
h.isAbstract= true and h.visibility=#public)
else
false
endif) (
name <- e.name
)

> The problem here is when the iterator "h" is a package i get this error
> :"isAbstract does not exist on UML2!Package" !
> So i want to test on isAbstract only when the type is a UML2!Class.
> Does anybody have an idea of how to do such things?!!
>

Re: [ATL] Mixed types collection operations [message #93394 is a reply to message #93360]

Tue, 28 October 2008 06:56

Eclipse User

This is a multi-part message in MIME format.
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Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 8bit

Hi,

Maybe you can write something like this (with an helper) to solve your
problem:

myPublicMemoryTypes: distinct AAXL!MemoryType foreach (e in
s.packagedElement->select(h | h.isClassAbstractAndPublic()) (
name <- e.name
)

helper context UML2!PackagedElement -- Not sure if it's the good type ;)
def : isClassAbstractAndPublic() : Boolean =
if self.oclIsTypeOf(UML2!Class) then
if (self.isAbstract=true and self.visibility=#public) then
true
else
false
endif
else
false
endif;

I also advised you to replace distinct-foreach by lazy rules if it is
possible
( http://www.eclipse.org/m2m/atl/basicExamples_Patterns/articl e.php?file=Port/index.html)

Regards,
Freddy.

Skander a

Re: [ATL] Mixed types collection operations [message #93408 is a reply to message #93394]

Tue, 28 October 2008 08:56

Eclipse User

thanks for all, the lazy rule is what i was looking for!
but i didn't find anything about it in the ATL User GUIDE. The example you
gave (freddy) is clear enough.
Hope this user guide will be updated soon, it will be good for the
beginners (like me).

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