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Context of content in Sirius [message #1512139] Mon, 15 December 2014 13:39 Go to next message
Erlend Stav is currently offline Erlend StavFriend
Messages: 12
Registered: September 2012
Junior Member
What is the intended context of the content that is available in the diagrams of Sirius?

The reason I ask is that we have experienced some unexpected behaviour from the diagram editors we have created, when it comes to what content is shown and what is available in the property editors.

More concretely, when we have cross-references from one object to another, in the property editor it is possible to choose from all objects of all models in the current project. This is different from when we open the same model with the default tree-based editor generated by EMF through the .genmodel, which only lists the objects of the current model being edited (+ objects of any explicitly imported models).

Similarly, we have also observed some behaviour in diagrams, where information belonging to other models have appeared unexpectedly.

Is there any known issue that could cause this behaviour, or is it by design? It seems that this could be a cause of much confusion if the behaviour remains different from than in the EMF-generated editors.

Re: Context of content in Sirius [message #1512298 is a reply to message #1512139] Mon, 15 December 2014 16:32 Go to previous messageGo to next message
Pierre-Charles David is currently offline Pierre-Charles DavidFriend
Messages: 522
Registered: July 2009
Senior Member
Hi.

Le 15/12/2014 14:39, Erlend Stav a écrit :
> What is the intended context of the content that is available in the
> diagrams of Sirius?

This context is the Sirius session (technically the Editing Domain's
ResourceSet), which includes all the semantic models referenced
(transitively) by the representations, and may include other models if
added explicitly.

If you are using the default UI based around "Modeling Projects", by
default all EMF models physically inside the project (except for the
Sirius-specific .aird) are considered semantic models of the underlying
session.

> The reason I ask is that we have experienced some unexpected behaviour
> from the diagram editors we have created, when it comes to what content
> is shown and what is available in the property editors.
[snip]
> Is there any known issue that could cause this behaviour, or is it by
> design?

This is by design, to ensure the consistency of inter-models references.
If you are modifying a model on a Sirius diagram, for example by
removing an element, any other model in the same session/project will be
correctly updated to avoid them keeping a stale reference (for example).

Because Sirius is often used to show many alternative and partial views
of the same underlying model (seen through different viewpoints), with
different edition capabilities, it is particularly important that the
global consistency of the whole is guaranteed and automatic.

> It seems that this could be a cause of much confusion if the
> behaviour remains different from than in the EMF-generated editors.

EMF-generated editors will also allow you to reference any compatible
elements from any model which are loaded in their ResourceSet (you can
load any model you want to add the scope using "Load Resource"), but
they only load referenced models when needed, and will not see
referecing models unless loaded manually each time. Sirius defaults to
automatically loading more models to ensure they remain globally
consistent.

Note that if that is a problem in your case, you can mitigate it by
either splitting our project into multiple Modeling Projects so that the
scope of each session is reduced (you can still explicitly use models
from outside the modeling project, see [1]), or use plain non-Modeling
projects [2] and avoid the automatic loading in the session of all
models in the same project.

[1]
https://www.eclipse.org/sirius/doc/user/general/Modeling%20Project.html#ProjectDependencies
[2]
https://www.eclipse.org/sirius/doc/user/general/Modeling%20Project.html#LegacyMode

--
Pierre-Charles David - Obeo

Need professional services for Sirius?
http://www.obeodesigner.com/sirius


Pierre-Charles David - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius
Re: Context of content in Sirius [message #1512329 is a reply to message #1512139] Mon, 15 December 2014 17:07 Go to previous messageGo to next message
Maxime Porhel is currently offline Maxime PorhelFriend
Messages: 482
Registered: July 2009
Location: Nantes, France
Senior Member
Hi.

Le 15/12/2014 14:39, Erlend Stav a écrit :
> What is the intended context of the content that is available in the
> diagrams of Sirius?
>
> The reason I ask is that we have experienced some unexpected behaviour
> from the diagram editors we have created, when it comes to what content
> is shown and what is available in the property editors.
>
> More concretely, when we have cross-references from one object to
> another, in the property editor it is possible to choose from all
> objects of all models in the current project. This is different from
> when we open the same model with the default tree-based editor generated
> by EMF through the .genmodel, which only lists the objects of the
> current model being edited (+ objects of any explicitly imported models).


> Similarly, we have also observed some behaviour in diagrams, where
> information belonging to other models have appeared unexpectedly.

Do you have empty semantic candidates expressions for the impacted
mapping in your Viewpoint Specification Model (.odesign file) ? For
those empty expressions, Sirius will look in every loaded semantic model
to find elements matching the domain class property of the mapping and
this could correspond to your "unexpectly" appearing elements. If you
put some non-empty expression they will be evaluated with the domain
element of the diagram element for which Sirius is computing the
children as context.


>
> Is there any known issue that could cause this behaviour, or is it by
> design? It seems that this could be a cause of much confusion if the
> behaviour remains different from than in the EMF-generated editors.
>
>

Regards

--
Maxime - Obeo

Need professional services for Sirius?
http://www.obeodesigner.com/sirius


Maxime Porhel - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

Join the Sirius community at SiriusCon. Register for free: Nov. 9th Paris
http://www.siriuscon.org/
Re: Context of content in Sirius [message #1515892 is a reply to message #1512298] Thu, 18 December 2014 13:24 Go to previous message
Erlend Stav is currently offline Erlend StavFriend
Messages: 12
Registered: September 2012
Junior Member
Thanks for your quick and clear explanation of the behaviour!
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