[otj-users] Callin methods

[Marco Mosconi]

Hi Michael,

from your example I guess that you want to make role methods available 
on the base class, i.e. implicitly enhancing its type to be conform to 
the role type. Such kind of invasive type modification (like 
introduction in AspectJ) is not supported in Object Teams.
It is part of the role concept of OT that roles are only meaningful in a 
special context (their team/collaboration). Clients of the original base 
class are not aware of the role methods at all, and clients knowing the 
team context would use the role instead of the base.
But your scenario would work the other way round: a role class can be 
implemented to completely decorate its base using "inferred callouts". 
Clients of the role class can then access features of the base class 
transparently. See 
https://svn.objectteams.org/trac/ot/wiki/OtPatterns/TransparentRole for 
more information and an example.

Regards,
Marco

Michael Pradel schrieb:
>>> Just another question... Is it possible to call role methods from a base
>>>> class (i.e. callin methods) without a corresponding method in the base
>>>> class, i.e., without using <- ?
>> what would then be the trigger for the role method call? Would you like to 
>> call it explicitly, like a regular method or do you think of some kind of 
>> pointcut other than method execution?
> 
> Yes, I'd like to call a role method directly. Shouldn't that be possible
> whenever the context (i.e. the team instance) is given, e.g.
> 
> MyTeam t = new MyTeam();
> within(t) {
>   baseObject.roleMethod();
> }
> 
> I assume that there is a role type having a method m that is a played by
> the class of baseObject.
> 
> 
> Michael
> 
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-- 
Dipl.-Inform. Marco Mosconi
Technische Universität Berlin
Fak. IV, Fachg. Softwaretechnik