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StateMachine - Transitions [message #1829312] Wed, 01 July 2020 07:02 Go to next message
Eclipse UserFriend
Hey everyone! I created a DSL for state machines in XText and now I am trying to use Sirius. This is my diagram. index.php/fa/38458/0/

My problem is when I try to create an edge relation for transitions , they do not show. The ones I have primarely defined are showing, but when I click on a source state and on a target state no line is created. These are the screenshots on my diagram, on how I created the transitions and on how I am trying to create new ones.
index.php/fa/38459/0/
index.php/fa/38460/0/
index.php/fa/38461/0/
Re: StateMachine - Transitions [message #1829314 is a reply to message #1829312] Wed, 01 July 2020 07:51 Go to previous messageGo to next message
Eclipse UserFriend
Have you checked whether the underlying model has new transitions? I suspect that they are not created at all because of a typo in your change context rule: aql: source.eContainer()
Re: StateMachine - Transitions [message #1829315 is a reply to message #1829314] Wed, 01 July 2020 07:56 Go to previous messageGo to next message
Eclipse UserFriend
I believe there was a typo as when I was trying to create transitions nothing would happen, I had nothing to save. But now after I made the change as you suggested, I click on two states, the arrow connecting the two states does not show, but it shows that there are changes that can be saved. When I try to save it it shows this:
An internal error occurred during: "Saving Models for project SiriusTest".
Could not serialize Transitions:
Transitions.name is required to have a value, but it does not.
Transitions.condition is required to have a value, but it does not.
Transitions.action is required to have a value, but it does not.
Semantic Object: StateMachine.transitions[7]->Transitions
URI: platform:/resource/SiriusTest/spec1.statemachine
Context: Transitions returns Transitions
Re: StateMachine - Transitions [message #1829316 is a reply to message #1829315] Wed, 01 July 2020 08:12 Go to previous messageGo to next message
Eclipse UserFriend
The error is explicit: you have to provide a value for the name, condition and action attributes; I guess that those EAttributes have a lower bound of 1 in your Ecore metamodel (meaning they are mandatory). You can:

  • Set the lower bound to 0 if those attributes are actually optional (in the .ecore),
  • Set the empty string as the default value of those attributes (in the .ecore), so that they are not null when a new Transition is created,
  • Use Sirius' Set operation to set those attributes a value when you create the Transitions (in the .odesign).

Regarding why the arrows are not shown there may be a mistake in the Set operation's properties. Make sure that:

  • Feature name is either enterstate or exitstate
  • Value expression is either var:source or var:target (see documentation's screenshots).
Re: StateMachine - Transitions [message #1829317 is a reply to message #1829316] Wed, 01 July 2020 08:16 Go to previous messageGo to next message
Eclipse UserFriend
If those attributes are mandatory and if you want the user to provide them when the Transition is created then you can also call a Java service that would show a form that can be filled by the user.
Re: StateMachine - Transitions [message #1829318 is a reply to message #1829316] Wed, 01 July 2020 08:17 Go to previous message
Eclipse UserFriend
Thank you very much! It worked now as my mistake was that as a feature name I had var:source and var:target. Thank you once again! :)
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