[news.eclipse.modeling.mdt.uml2] Re: Problems with DerivedUnion during d

[Timothy Marc <timothymarc@xxxxxxxxxx>]

Kenn,

god damn, i was aware of all other derived attributes or subset, but not 
for the unions... is there any rationale, why derived associations or 
attributes are not generally set to transient=true? Because of that they 
are already set to volatile=true i allways forget to set them manually 
to transient. But, it works now. Thanks!

Another point: The generated editor behaves weird for the following 
snippet. I defined the following (trying to approximate the ownedRule 
semtanics of the superstructure):

#####
Element {abstract}
    +/ownedElement * {union, read-only, containment}
    +/ownedRule 0..* {subsets ownedElement, containment}

NamedElemet extends Element

BehavioralFeature extends NamedElement

Operation extends BehavioralFeature
    +precondition 0..* {subsets ownedRule, containment}
    +postcondition 0..* {subsets ownedRule, containment} #####

If i add an 'ownedRule' to the operation, everything is fine. But any 
adding of either pre- or postcondition has the effect, that 2 instances 
of the same constraint is displayed. Well, the XMI looks okay, IMHO:

<packagedElement xsi:type="testing:Class" xmi:id="_cUg_8IXsEd6Lu8REkryexw">
    <ownedOperation xmi:id="_fkrwMIXsEd6Lu8REkryexw" 
postcondition="_gJMLcIXsEd6Lu8REkryexw">
      <ownedRule xmi:id="_gJMLcIXsEd6Lu8REkryexw"/>
    </ownedOperation>
  </packagedElement>

The postcondition belongs both to the ownedRule containment reference, 
and to the postcondition reference of its context operation. In the 
editor, the constraint is shown twice instead of just being a single 
element. If i add a constraint via the ownedRule reference, only a 
single element is displayed.

The java code for Operation::postcondition is:

public EList<Constraint> getPostconditions() {
	if (postconditions == null) {
		postconditions = new 
SubsetSupersetEObjectResolvingEList<Constraint>(Constraint.class, this, 
TestingPackage.OPERATION__POSTCONDITION, POSTCONDITION_ESUPERSETS, null);
	}
	return postconditions;
}

and for Element::ownedRule it is

public EList<Constraint> getOwnedRules() {
	if (ownedRules == null) {
		ownedRules = new 
EObjectContainmentWithInverseEList<Constraint>(Constraint.class, this, 
TestingPackage.MODEL_ELEMENT__OWNED_RULE, 
TestingPackage.CONSTRAINT__CONTEXT);
	}
	return ownedRules;
}

Again some perfect ideas?

Thanks in advance
Timothy

Kenn Hussey schrieb:
> Timothy,
>
> I wouldn't have expected to see an 'ownedElement' element in the 
> serialization, since derived unions are, by definition read-only (hence 
> the reason why the addition is failing upon deserialization). Did you 
> make that feature transient in the metamodel?
>
> Kenn
>
> Timothy Marc wrote:
> > Hey all,
> >
> > i'm using the UML2 genmodel to generate a uml-like metamodel with 
> > subsets and unions etc. I've rebuild the Element -> ownedComment 
> > relationship of the UML 2.2 Superstructure (Figure 7.3). Instead of 
> > Comment, i've sed the term Annotation. The model looks like
> >
> > Element {abstract}
> >     +/owner 0..1 {union, read-only}
> >     +/ownedElement * {union, read-only}
> >
> > TestingModel extends Element
> >     + annotation * {subsets ownedElement}
> >
> > Annotation extends Element
> >
> >
> > When i define a simple model like the model mentioned in the following 
> > XMI snippet
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <union:TestingModel xmi:version="2.0" 
> > xmlns:xmi="http://www.omg.org/XMI"; xmlns:union="http:///union.ecore"; 
> > ownedElement="//@annotation.0">
> >   <annotation/>
> > </union:TestingModel>
> >
> > i ran allways in an exception during deserialization. I've tried both 
> > the editor and the programmatically deserialization. Both fail with 
> > the following exception trace. It seems, that somewhere the 
> > DerivedEObjectEList.add() method will be called.
> >
> > org.eclipse.emf.ecore.xmi.IllegalValueException: Value 
> > 'union.impl.AnnotationImpl@352d87' is not legal. 
> > (platform:/resource/f/My.union, -1, -1)
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLHandler.setFeatureValue(XMLHandler.java:2648) 
> >
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLHandler.handleForwardReferences(XMLHandler.java:1135) 
> >
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLHandler.endDocument(XMLHandler.java:1214) 
> >
> >     at 
> > com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown 
> > Source)
> >     at 
> > com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown 
> > Source)
> >     at javax.xml.parsers.SAXParser.parse(Unknown Source)
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:181)
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:180) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1445) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1241) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:255) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:270) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:397) 
> >
> >     at union.presentation.UnionEditor.createModel(UnionEditor.java:950)
> >     at union.presentation.UnionEditor.createPages(UnionEditor.java:1007)
> >     at 
> > org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:310) 
> >
> >     at ....
> >
> >
> > Caused by: java.lang.UnsupportedOperationException
> >     at 
> > org.eclipse.uml2.common.util.DerivedEObjectEList$DerivedListIterator.add(DerivedEObjectEList.java:278) 
> >
> >     at java.util.AbstractSequentialList.add(Unknown Source)
> >     at 
> > org.eclipse.uml2.common.util.DerivedEObjectEList.addUnique(DerivedEObjectEList.java:636) 
> >
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl.setValue(XMLHelperImpl.java:1192) 
> >
> >     at 
> > org.eclipse.emf.ecore.xmi.impl.XMLHandler.setFeatureValue(XMLHandler.java:2643) 
> >
> >     ... 58 more
> >
> >
> > For serialization and deserialization i'm using an 
> > XMIBResource(Factory) created by the genmodel automatically. Please 
> > let me know, what is going wrong in this really simple example.
> >
> > Thanks in advance
> > Timothy