[gme-users] GME Tutorial Question

[Toth, Csaba]

Abdul,

If you only have such a problem that your interpreter is not invoked when
you suspects it to be activated, just pay attention during the interpreter
creation what kind of events you select, or you can also manually tune the
ADDON_EVENTMASK in your ComponentConfig.h

Csaba

> Abdul,
>
> I never really understood the way BON2 and the extender implement the
> visitor pattern (I suspect they get this pattern wrong...badly).
> The traversal is implemented in the stock BON2 classes. So if you do
> not use the extender, you can easily create a Visitor class and the
> ::visit<...>Impl methods will be called by the framework as it
> traverses trhough the containment hierarchy (you should initiate this
> by calling the accept() method on a higher level container object).
> The extender complicates this. It uses the traversal code of the stock
> (non-domain specific) framework as described above and at every
> ::visit<...>Impl method call in the generated visitor skeleton the
> generated code tries to cast the object pointer to all extended types
> (eg. an atom pointer to all domain specific type which are of the atom
> stereotype) and will call a visi<...>Impl method with the casted
> pointer. If you inherit from the generated visitor you can override
> these visit<...>Impl methods, but I guess you should check for null
> pointers because of this trial and error casting logic (???).
>
> If the whole thing does not work as I described (or at all), the error
> probably is not with you.
>
> Have fun.
>
> --
> peter
>
>
>
> On Thu, Mar 18, 2010 at 5:22 PM, Sowayan, Abdullah (N-ED Software
> Inc.) <abdullah.sowayan at lmco.com> wrote:
>> Hi folks,
>>
>>
>>
>> So I was able to move a little forward with the tutorial example. I
>> instantiate my visitor in invokeEx and call accept on the NetDiagram.
>>
>>
>>
>> My question is a simple one, do I have to do the traversal myself, or
>> can I
>> pass the root model (NetDiagram) and have something traverse it for me
>> and
>> call accept on the visitor?
>>
>>
>>
>>
>>
>> void Component::invokeEx( Project& project, FCO& currentFCO, const
>> std::set<FCO>& setSelectedFCOs, long lParam )
>>
>> {
>>
>> #ifdef GME_ADDON
>>
>>       project->setAutoCommit( false);
>>
>> #endif
>>
>>       using namespace GMEConsole;
>>
>>       Console::Out::WriteLine("Interpreter started...");
>>
>>       // ======================
>>
>>       // TODO: Insert application specific code here
>>
>>
>>
>>   Console::Out::WriteLine((std::string("Router list for network ") +
>> project->getRootFolder()->getName()).c_str());
>>
>>       std::set<BON::Object> diagrams =
>> project->getRootFolder()->getChildObjects("NetDiagram");
>>
>>       for (std::set<BON::Object>::iterator it = diagrams.begin(); it !=
>> diagrams.end(); it++) {
>>
>>             Networking::NetDiagram diagram = *it;
>>
>>     Networking::networkingVisitor* netvisit = new
>> Networking::networkingVisitor;
>>
>>     diagram->accept(netvisit);
>>
>>     delete netvisit;
>>
>> //          ProcessDiagram(diagram);
>>
>>       }
>>
>>
>>
>>       Console::Out::WriteLine("Interpreter completed...");
>>
>> }
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> bool networkingVisitor::visitNetDiagram( const Networking::NetDiagram&
>> object )
>>
>> {
>>
>>       if ( !object)
>>
>>             return false;
>>
>>
>>
>>   GMEConsole::Console::Out::WriteLine("Abdul Abdul Abdul");
>>
>>
>>
>>       return true;
>>
>> }
>>
>>
>>
>> Thanks,
>>
>> Abdul
>>
>>
>>
>>
>>
>> From: gme-users-bounces at list.isis.vanderbilt.edu
>> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf Of
>> Sowayan,
>> Abdullah (N-ED Software Inc.)
>> Sent: Thursday, March 18, 2010 5:33 PM
>> To: A list for GME users to share thoughts and discuss bugs and fixes.
>> Subject: [gme-users] GME Tutorial Question
>>
>>
>>
>> Hi folks,
>>
>>
>>
>> I am trying to follow the GME tutorial. It has been many, many years
>> since I
>> wrote an interpreter. I was specifically intrigued with the BON2
>> Extender.
>>
>>
>>
>> I have generated the visitor classes using the BON2Extender interpreter
>> in
>> GME, and my whole project builds fine. What I can’t seem to figure out
>> is
>> how to get my visitor invoked.
>>
>>
>>
>> In my simple interpreter (based on the tutorial) I have this:
>>
>>
>>
>> networkingVisitor::networkingVisitor()
>>
>> {
>>
>>   myfile.open("Abdul.txt");
>>
>> }
>>
>>
>>
>> bool networkingVisitor::visitHost( const Networking::Host& object )
>>
>> {
>>
>>       if ( !object)
>>
>>             return false;
>>
>>
>>
>>   myfile << "Abdul Abdul Abdul" << std::endl;
>>
>>
>>
>>       return true;
>>
>> }
>>
>>
>>
>>
>>
>> Abdul.txt never gets created. It is not clear to me where I should
>> instantiate my visitor and call accept() method.
>>
>>
>>
>> Any help would be greatly appreciated.
>>
>>
>>
>> Thanks,
>>
>> Abdul
>>
>>
>>
>>
>>
>> _______________________________________________
>> gme-users mailing list
>> gme-users at list.isis.vanderbilt.edu
>> http://list.isis.vanderbilt.edu/mailman/listinfo/gme-users
>>
>>
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