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StateMachine - Transitions [message #1829312]

Wed, 01 July 2020 11:02

Malvina Latifaj

Messages: 11
Registered: June 2020

Junior Member

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/

Attachment: diagram.png
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Attachment: Screenshot 2020-07-01 at 12.51.43.png
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Attachment: Screenshot 2020-07-01 at 12.53.11.png
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Attachment: Screenshot 2020-07-01 at 12.53.51.png
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Re: StateMachine - Transitions [message #1829314 is a reply to message #1829312]

Wed, 01 July 2020 11:51

Emmanuel Chebbi

Messages: 123
Registered: February 2018

Senior Member

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()

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Re: StateMachine - Transitions [message #1829315 is a reply to message #1829314]

Wed, 01 July 2020 11:56

Malvina Latifaj

Messages: 11
Registered: June 2020

Junior Member

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

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Re: StateMachine - Transitions [message #1829316 is a reply to message #1829315]

Wed, 01 July 2020 12:12

Emmanuel Chebbi

Messages: 123
Registered: February 2018

Senior Member

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).

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Re: StateMachine - Transitions [message #1829317 is a reply to message #1829316]

Wed, 01 July 2020 12:16

Emmanuel Chebbi

Messages: 123
Registered: February 2018

Senior Member

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.

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