Eclipse Community Forums: EMF » Incomplete EPackage from ecore file

Home » Modeling » EMF » Incomplete EPackage from ecore file

Incomplete EPackage from ecore file [message #1861705]

Mon, 30 October 2023 04:50

Eclipse User

Hi,

I'm working on checking in runtime if a VQL file is syntactically correct given a metamodel.

The problem is that when I parse an ECore metamodel from file, the references and containments are missing.

val ResourceSet resourceSet = new ResourceSetImpl();
EPackage.Registry.INSTANCE.put(EcorePackage.eNS_URI, EcorePackage.eINSTANCE)

resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put(
	"ecore", new EcoreResourceFactoryImpl());

val resource = resourceSet.getResource(
	URI.createFileURI("res/meta.ecore"), true);
		
val pkg = resource.contents.get(0) as EPackage

If I run the code above, classifiers and super types are loaded in, but none of the structural features. (eAllReferences, eAllStructuralFeatures and eAllContainments are null.)

Do you have any idea on what is the problem and how to fix it?

Thanks,
Máté

Re: Incomplete EPackage from ecore file [message #1861713 is a reply to message #1861705]

Mon, 30 October 2023 09:20

Eclipse User

Always load a resource using an absolute URI, e.g., URI.createFileURI(new File("res/meta.ecore").getAbsolutePath()), otherwise relative URIs within the serialized resources cannot be properly resolved.

Re: Incomplete EPackage from ecore file [message #1861725 is a reply to message #1861713]

Tue, 31 October 2023 04:18

Eclipse User

Thank you for the response.

There are no relative URIs in the ecore file.

metamodel:

<?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="satellite1" nsURI="http://www.example.org/satellite1" nsPrefix="satellite1">
  <eClassifiers xsi:type="ecore:EClass" name="ConstellationMission">
    <eStructuralFeatures xsi:type="ecore:EReference" name="groundStationNetwork" lowerBound="1"
        eType="#//GroundStationNetwork" containment="true"/>
    <eStructuralFeatures xsi:type="ecore:EReference" name="spacecraft" lowerBound="2"
        upperBound="-1" eType="#//Spacecraft" containment="true"/>
  </eClassifiers>
  <eClassifiers xsi:type="ecore:EClass" name="CommunicatingElement">
    <eStructuralFeatures xsi:type="ecore:EReference" name="commSubsystem" lowerBound="1"
        upperBound="2" eType="#//CommSubsystem" containment="true"/>
  </eClassifiers>
  <eClassifiers xsi:type="ecore:EClass" name="GroundStationNetwork" eSuperTypes="#//CommunicatingElement"/>
  <eClassifiers xsi:type="ecore:EClass" name="InterferometryMission" eSuperTypes="#//ConstellationMission"/>
  <eClassifiers xsi:type="ecore:EClass" name="Spacecraft" abstract="true" eSuperTypes="#//CommunicatingElement">
    <eStructuralFeatures xsi:type="ecore:EReference" name="payload" eType="#//Payload"
        containment="true"/>
  </eClassifiers>
  <eClassifiers xsi:type="ecore:EClass" name="CommSubsystem" abstract="true">
    <eStructuralFeatures xsi:type="ecore:EReference" name="target" eType="#//CommSubsystem"/>
    <eStructuralFeatures xsi:type="ecore:EReference" name="fallback" eType="#//CommSubsystem"/>
  </eClassifiers>
  <eClassifiers xsi:type="ecore:EClass" name="Payload" abstract="true"/>
  <eClassifiers xsi:type="ecore:EClass" name="InterferometryPayload" eSuperTypes="#//Payload"/>
  <eClassifiers xsi:type="ecore:EClass" name="CubeSat3U" eSuperTypes="#//CubeSat"/>
  <eClassifiers xsi:type="ecore:EClass" name="CubeSat6U" eSuperTypes="#//CubeSat"/>
  <eClassifiers xsi:type="ecore:EClass" name="SmallSat" eSuperTypes="#//Spacecraft"/>
  <eClassifiers xsi:type="ecore:EClass" name="CubeSat" abstract="true" eSuperTypes="#//Spacecraft"/>
  <eClassifiers xsi:type="ecore:EClass" name="UHFCommSubsystem" eSuperTypes="#//CommSubsystem"/>
  <eClassifiers xsi:type="ecore:EClass" name="XCommSubsystem" eSuperTypes="#//CommSubsystem"/>
  <eClassifiers xsi:type="ecore:EClass" name="KaCommSubsystem" eSuperTypes="#//CommSubsystem"/>
</ecore:EPackage>

Re: Incomplete EPackage from ecore file [message #1861727 is a reply to message #1861725]

Tue, 31 October 2023 05:00

Eclipse User

This is relative reference:

eType="#//GroundStationNetwork"

Always, always use absolute URIs, if only for for your safety and comfort.

Re: Incomplete EPackage from ecore file [message #1861729 is a reply to message #1861727]

Tue, 31 October 2023 05:48

Eclipse User

Ok, I changed it to what you suggested, but the issue persist.

#//CommSubsystem is resolved properly in

<eClassifiers xsi:type="ecore:EClass" name="KaCommSubsystem" eSuperTypes="#//CommSubsystem"/>

But, in case of

<eClassifiers xsi:type="ecore:EClass" name="CommSubsystem" abstract="true">
    <eStructuralFeatures xsi:type="ecore:EReference" name="target" eType="#//CommSubsystem"/>
    <eStructuralFeatures xsi:type="ecore:EReference" name="fallback" eType="#//CommSubsystem"/>
</eClassifiers>

there are no entries for the structural features.

index.php/fa/43659/0/

Attachment: feature.PNG
(Size: 31.69KB, Downloaded 200 times)

Re: Incomplete EPackage from ecore file [message #1861731 is a reply to message #1861729]

Tue, 31 October 2023 07:05

Eclipse User

I see a containment list for eStructuralFeatures, but I don't know how you know it's empty. That's not evident from your picture. It's pretty much impossible for containment features not to be populated for a resource that loads without exceptions/errors. I can see eOperations is null (because the getter has never been called) but eStructuralFeatures is not null and I expect it contains your two features.

Previous Topic:	Models partially loaded with jUnit
Next Topic:	Changed behavior of Undo/Redo menu's entries?

Goto Forum:

-=] Back to Top [=-

Current Time: Tue Jul 15 07:08:14 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter