Thanks for all your answers.
I think NACs will do it ;-)
Best,
Jürgen
Dipl.-Ing. Jürgen Freund
Arbeitsgruppe Ähnlichkeitsmechanik
Telefon: +49 (0)711 685 69530
E-Mail: freund@xxxxxxxxxxxxxxxxxxxx
Postadresse:
Universität Stuttgart
Institut für Statik und Dynamik der Luft- und Raumfahrtkonstruktionen
Pfaffenwaldring 27 - Zimmer 01.002
70569 Stuttgart
On 23.05.2017 13:30, Daniel Strüber
wrote:
Hi all,
I agree with Steffen. When you connect two nodes, the requirement
"I only want them to connect only once" implies that you need to
check if any of the considered nodes already has a connection -
this is essentially a negative application condition.
For a simple example NAC, see the banking example at https://www.eclipse.org/henshin/examples.php?example=bank
- the "createAccount" rule has a NAC (the <<forbid>>
part), specifying that an account with a certain ID can only be
created if no other account with the same ID exists.
Best regards,
Daniel
Am 23.05.2017 um 12:38 schrieb
Steffen Zschaler:
I see. Not sure NACs are the only way, but they seem like a
natural choice. Otherwise, the risk is that Henshin will
choose the same match every time and just add the same
connection repeatedly.
Steffen
On 23/05/2017 11:36, Juergen Freund
wrote:
Thanks for the fast answer.
I don't want to connect them directly because I am just
playing around a bit and want to fully understand how Henshin
works.
I also thought about NACs, but I was not sure if that is the
only way to do it.
Dipl.-Ing. Jürgen Freund
Arbeitsgruppe Ähnlichkeitsmechanik
Telefon: +49 (0)711 685 69530
E-Mail: freund@xxxxxxxxxxxxxxxxxxxx
Postadresse:
Universität Stuttgart
Institut für Statik und Dynamik der Luft- und Raumfahrtkonstruktionen
Pfaffenwaldring 27 - Zimmer 01.002
70569 Stuttgart
On 23.05.2017 12:32, Steffen
Zschaler wrote:
Just some thoughts off the top of my head:
- Why not add the connection when you create the
instances of A and B?
- Alternatively, you could probably add a NAC to your
connection-creating rule to make sure the connection
doesn't already exist.
Best regards,
Steffen
On 23/05/2017 11:24, Juergen
Freund wrote:
Dear Henshin Users and Developers,
I have problem with rules which I am not able to solve.
I want to create 50 instances of a class A and 50
instances of a class B.
After that is done I want to connect all of them in a
separate rule. And I only want them to connect only once.
Which means in the end there should be 50 edges more in
the graph.
So what I have done:
- Rule to create class A and class B
- Iterated Unit which calls the rule above 50 times.
Now is the part I don't know haw to do it right.
- Rule which creates an edge between a preserved A and
a preserved B --> only one single connection is
added
- Amalgamation Rule which creates an edge between a
preserved* A and a preserved* B --> each a has 50
connections to each B
I added the project with my examples. It would be nice
if you could me out.
Kind regards,
Jürgen
--
Dipl.-Ing. Jürgen Freund
Arbeitsgruppe Ähnlichkeitsmechanik
Telefon: +49 (0)711 685 69530
E-Mail: freund@xxxxxxxxxxxxxxxxxxxx
Postadresse:
Universität Stuttgart
Institut für Statik und Dynamik der Luft- und Raumfahrtkonstruktionen
Pfaffenwaldring 27 - Zimmer 01.002
70569 Stuttgart
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Department of Informatics
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