Ecore Model Uploaded but Cannot Create Representations

[rongHu233]

Hello everyone,

I'm facing a new challenge after successfully implementing a fix for model loading in Sirius Web and I need some guidance.

1. Problem Solved: Ecore Model Upload
   Initially, I ran into the classic "Package with uri '...' not found" error when trying to upload an Ecore model. The root cause was that the Ecore package was not registered in the server's ResourceSet.

I successfully fixed this problem by following the approach in a related discussion thread：#3682 . Now, my model.ecore loads correctly into the Sirius Web explorer.

2. New Problem: Viewpoint Integration Missing
   While the model loads, I can't seem to do anything with it in terms of visualization. The Sirius Viewpoint features are not active for the uploaded Ecore model.

Specifically:

When I select the uploaded Ecore model, I do not see the "Create representation" option in the explorer or the context menu.

In other parts of the application (like when configuring a Viewpoint or selecting a domain for an object), the uploaded Ecore metamodel is not available for selection.

3. My Question
   My current fix only involves registering the EcorePackage.eINSTANCE in the PackageRegistry of the ResourceSet.

Does this approach—which enables model loading—inhibit the creation of Sirius Viewpoints/Representations? Or, is there an additional technical step I need to take to bridge the gap between a successfully loaded Ecore model and its use as a domain for a Sirius Viewpoint (.odesign) in the Web environment?

Any insights on how to properly integrate the uploaded Ecore metamodel so it can be used for representation creation would be greatly appreciated! Thank you in advance.

[sbegaudeau]

Hi,

Initially, I ran into the classic "Package with uri '...' not found" error when trying to upload an Ecore model. The root cause was that the Ecore package was not registered in the server's ResourceSet.

Ecore is indeed not registered as an EPackage available in the resource set of our projects by default. We are using Ecore as a low level API which is not exposed in the web interface. One can easily register it globally and create a dedicated IEditingContextProcessor like our FlowEditingContextInitializer to make Ecore available to all (some?) projects. See the following screenshot

While the model loads, I can't seem to do anything with it in terms of visualization. The Sirius Viewpoint features are not active for the uploaded Ecore model.
When I select the uploaded Ecore model, I do not see the "Create representation" option in the explorer or the context menu.

How have you registered the Ecore metamodel? It should work without issues with the previous code. I successfully created (and then deleted) a representation on an Ecore model.

Kind regards,

Stephane Begaudeau, Obeo