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Can't use aql due to java.lang.IllegalStateException [message #1823822]

Thu, 02 April 2020 10:30

Eclipse User

Hi,

I've met a strange problem currently. In my .odesign file I can use service, var, feature normally, but I failed to use aql query's auto completion. Every time I type in aql:self. and hit ctrl+space, an error happens like below:

!ENTRY org.eclipse.ui 4 0 2020-04-02 22:26:59.257
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.IllegalStateException: Couldn't register package null because its name is null.
	at org.eclipse.acceleo.query.runtime.impl.EPackageProvider.registerPackage(EPackageProvider.java:282)
	at org.eclipse.acceleo.query.runtime.impl.QueryEnvironment.registerEPackage(QueryEnvironment.java:94)
	at org.eclipse.sirius.common.acceleo.aql.business.internal.AQLSiriusInterpreter.activateMetamodels(AQLSiriusInterpreter.java:181)
	at org.eclipse.sirius.common.acceleo.aql.ide.proposal.AQLProposalProvider.setupInterpreter(AQLProposalProvider.java:92)
	at org.eclipse.sirius.common.acceleo.aql.ide.proposal.AQLProposalProvider.getProposals(AQLProposalProvider.java:75)
	at org.eclipse.sirius.common.tools.api.interpreter.CompoundInterpreter.getProposals(CompoundInterpreter.java:441)
	at org.eclipse.sirius.ui.tools.api.assist.TextContentProposalProvider.getProposals(TextContentProposalProvider.java:87)
	at org.eclipse.jface.fieldassist.ContentProposalAdapter.getProposals(ContentProposalAdapter.java:1999)
	at org.eclipse.jface.fieldassist.ContentProposalAdapter.openProposalPopup(ContentProposalAdapter.java:1848)
	at org.eclipse.jface.fieldassist.ContentProposalAdapter.access$16(ContentProposalAdapter.java:1843)
	at org.eclipse.jface.fieldassist.ContentProposalAdapter$1.handleEvent(ContentProposalAdapter.java:1700)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4105)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1046)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1088)
	at org.eclipse.swt.widgets.Text.sendKeyEvent(Text.java:1766)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1084)
	at org.eclipse.swt.widgets.Widget.wmSysChar(Widget.java:2247)
	at org.eclipse.swt.widgets.Control.WM_SYSCHAR(Control.java:5420)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4796)
	at org.eclipse.swt.widgets.Text.windowProc(Text.java:2625)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4757)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(Native Method)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3522)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1049)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:658)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:557)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:154)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:150)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1447)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1420)

I don't known where I'm wrong because I can use aql expressions normally, but only aql's auto complete function is unavailable.

Thanks for any advice!

Re: Can't use aql due to java.lang.IllegalStateException [message #1823839 is a reply to message #1823822]

Thu, 02 April 2020 15:57

Eclipse User

Hi

Quote:

Couldn't register package null because its name is null

I strongly suspect that you have a package will a null name (or nsURI).

Edit your model, which probably has a validation error already in the Sample Ecore Model Editor to provide non-null name and nsURI.

Regards

Ed Willink

Re: Can't use aql due to java.lang.IllegalStateException [message #1823852 is a reply to message #1823839]

Fri, 03 April 2020 00:12

Eclipse User

Hi,

Thanks very much for your advice. I've checked my meta-model and sure that a nsURI is already set. Would you please tell me how can I find the package with the null name or null nsURI?

Re: Can't use aql due to java.lang.IllegalStateException [message #1823853 is a reply to message #1823852]

Fri, 03 April 2020 00:58

Eclipse User

Hi

There can't be that many. Look at them all. (and in the Sample Ecore Model Editor, validate to make sure that they are all loaded.)

Otherwise the debugger is your friend. Search the code for the message. Then set a breakpint on it.

Regards

Ed Willink

Re: Can't use aql due to java.lang.IllegalStateException [message #1823865 is a reply to message #1823853]

Fri, 03 April 2020 04:48

Eclipse User

Hi,

Sorry for bothering again but I still don't solve the problem. I read the Sirius source code and did some experiments. I found that the place where the error happens is:

private void setupInterpreter(ContentContext context, AQLSiriusInterpreter interpreter) {
        Collection<MetamodelDescriptor> metamodels = new ArrayList<MetamodelDescriptor>();
        for (EPackage pak : context.getInterpreterContext().getAvailableEPackages()) {
            if (pak != null) {
                metamodels.add(new EcoreMetamodelDescriptor(pak));
            }
        }
        interpreter.activateMetamodels(metamodels);
        if (context.getInterpreterContext().getElement() != null) {
            Resource vsmResource = context.getInterpreterContext().getElement().eResource();
            if (vsmResource != null) {
                interpreter.setProperty(IInterpreter.FILES, Lists.newArrayList(vsmResource.getURI().toPlatformString(true)));
            }
        }
        for (String imp : context.getInterpreterContext().getDependencies()) {
            interpreter.addImport(imp);
        }
    }

At context.getInterpreterContext().getAvailableEPackages() the Sirius got a null-named ePackage and then passed it to the aql runtime so caused the error. But the strange thing is, I found this error has nothing to do with my own Ecore model. I've done an experiment that I used the Sirius Sample Ecore Model(the BasicFamily model) to create a modeling project and in the viewpoint specification project I still get the null package name error. I wonder what the method getAvailableEPackages() returns and why there's always a null-named e package in the return value. The code is in a plugin without source code so I cannot set breakpoints to debug it, which makes me very disappointing.

My environment is Eclipse 2020-03 for RCP and RAP Developers with the latest Sirius and Ecore plugin installed.

Thanks so much for your help!

Re: Can't use aql due to java.lang.IllegalStateException [message #1823868 is a reply to message #1823865]

Fri, 03 April 2020 05:35

Eclipse User

Hi

It may not be your model; just one that your model makes transitove usage ok.

By looking at the eContainer/eResource of the bad EPackage you can find out the null EPackage's ancestry and Resource URI and so identify where to file a Bugzilla.

Regards

Ed Willink

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