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Create ecore annotation model and use it in another ecore model [message #1854804]

Mon, 12 September 2022 11:25

Eclipse User

I want use custom annotations for code generation from an ecore model.
For test and demonstration I created two models. The first model should contains
all my annotation and in the second I want assign it to a Package element. But my defined
URI doesn't appear in the list of EAnnotation elements. The models are located in different plugins.
I haven't found any tutorial, documentation or How To for creating stereotypes/annotation in ecore.

Annotation Model:
index.php/fa/42480/0/

<?xml version="1.0" encoding="UTF-8"?>
<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="annotation" nsURI="http://www.example.org/annotation" nsPrefix="annotation">
  <eAnnotations source="http://www.eclipse.org/emf/2002/Ecore">
    <details key="schemaLocation" value="http://www.example.org/annotation"/>
  </eAnnotations>
  <eClassifiers xsi:type="ecore:EClass" name="Package">
    <eStructuralFeatures xsi:type="ecore:EAttribute" name="myname" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
  </eClassifiers>
</ecore:EPackage>

Model:

But the EAnnontation(http://www.example.org/annotation) doesn't appear in the menu:
index.php/fa/42481/0/

Someone an idea what I'm doing wrong or has somebody an tutorial link?

Attachment: anno_model.png
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Attachment: menu2.png
(Size: 77.75KB, Downloaded 309 times)
Attachment: model_anno.png
(Size: 20.15KB, Downloaded 297 times)

Re: Create ecore annotation model and use it in another ecore model [message #1854809 is a reply to message #1854804]

Mon, 12 September 2022 13:12

Eclipse User

What appears in the menu is determined by things that are contributing to the org.eclipse.emf.ecore.edit.annotation_item_provider_adapter_factory extension point in addition to finding the EAnnotation.sourceURI of any annotation reachable from the *.ecore that you've loaded. There is no concept of "stereotype" in Ecore. Even the annotation_item_provider_adapter_factory is just an "authoring" convenience. In the end, EAnnotation is just something with a sourceURI and a details string-to-string map. That's it. Any meaning is determined by the consumer of the annotation and that consumer can use the annotation_item_provider_adapter_factory extension point to making authoring easier.

Re: Create ecore annotation model and use it in another ecore model [message #1854810 is a reply to message #1854809]

Mon, 12 September 2022 13:45

Eclipse User

EDITED: EdMerks next comment is much more accurate. org.eclipse.emf.ecore.edit.annotation_item_provider_adapter_factory is needed too.

HI

It is a long time since I implemented the OCL EAnnotations, but what seems to be distinctive is that the OCL ones all have validator definitions:

<extension point="org.eclipse.emf.ecore.annotation_validator">
<validator uri="http://www.eclipse.org/emf/2002/Ecore/OCL"
class="org.eclipse.ocl.pivot.internal.validation.Ecore_OCL_AnnotationValidator$Blank"/>
<validator uri="http://www.eclipse.org/emf/2002/Ecore/OCL/Debug"
class="org.eclipse.ocl.pivot.internal.validation.Ecore_OCL_AnnotationValidator$Debug"/>
<validator uri="http://www.eclipse.org/emf/2002/Ecore/OCL/Pivot"
class="org.eclipse.ocl.pivot.internal.validation.Ecore_OCL_AnnotationValidator$Pivot"/>
<validator uri="http://www.eclipse.org/OCL/ASLibrary"
class="org.eclipse.ocl.pivot.internal.validation.OCL_ASLibrary_AnnotationValidator"/>
<validator uri="http://www.eclipse.org/OCL/ASMetamodel"
class="org.eclipse.ocl.pivot.internal.validation.OCL_ASMetamodel_AnnotationValidator"/>
<validator uri="http://www.eclipse.org/OCL/Collection"
class="org.eclipse.ocl.pivot.internal.validation.OCL_Collection_AnnotationValidator"/>
<validator uri="http://www.eclipse.org/OCL/Import"
class="org.eclipse.ocl.pivot.internal.validation.OCL_Import_AnnotationValidator"/>
<validator uri="http://www.eclipse.org/OCL/MetaAnnotation"
class="org.eclipse.ocl.pivot.internal.validation.OCL_MetaAnnotation_AnnotationValidator"/>
</extension>

Have you defined these extensions?

Regards

Ed Willink

[Updated on: Mon, 12 September 2022 14:30] by Moderator

Re: Create ecore annotation model and use it in another ecore model [message #1854830 is a reply to message #1854810]

Tue, 13 September 2022 14:32

Eclipse User

Both models are located within the same workspace, that's why I can't use extension points. I thought annotations are a common use case.
It is possible to load/map the annotation in the corresponding Ecore Model Object?

For example:

XYZ_Utils.getAnnotation(ecore::EPackage, NS_URI_FROM_ANNO_MODEL => http://www.example.org/annotation) => This method would be returned the Package(annotation.ecore) Object.

The only thing I want is ot add some extra information to my EClass.

For example:

@DslAnnotation(keyword="restservice")
class RestApiService extends MyNamedDslElement {

}

May be there's another way to do that?

[Updated on: Tue, 13 September 2022 14:42] by Moderator

Re: Create ecore annotation model and use it in another ecore model [message #1854836 is a reply to message #1854830]

Wed, 14 September 2022 00:44

Eclipse User

HI

You are being distracted by the opportunities provided by the new disciplined support that validates EAnnoation content.

You can still use the older approach. Just add a 'blank' EAnnotation and paste the source in the Properties View.

Regards

Ed Willink

Re: Create ecore annotation model and use it in another ecore model [message #1854839 is a reply to message #1854836]

Wed, 14 September 2022 02:07

Eclipse User

As I mentioned, is no concept of "stereotype" in Ecore. Any association of an annotation to a specific EClass is something you'd have to implement programmatically, at which point you could generate your annotation model and could use an extension point to implement your specialized support for it, that is if eModelElement.getEAnnotation("sourceURI").getDetails().get("key") is not sufficient for your "extra information" purposes.

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