Texo/Troubleshooting

Exception while generating, when changing a type from interface to class or back

In the properties of an eclass you can specify if the eclass should be represented by an interface or java class (the 'interface' attribute). When changing this attribute from true to false then it is possible that Texo will not be able to generate a correct source. This happens because of an error in the merging of the generated and existing source code. A work around for this issue is to manually remove the source and then regenerate. This issue will be solved when the merging logic is revisited (a very long term topic...).

java.lang.IllegalStateException: Exception while generating
	at org.eclipse.emf.texo.eclipse.popup.actions.BaseGenerateAction.run(BaseGenerateAction.java:76)
	at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)

Class not managed by this ModelResolver

You encounter an issue like this when making use of Texo runtime functionality:

org.eclipse.emf.texo.Library is not managed by this ModelResolver
    at org.eclipse.emf.texo.utils.Check.isNotNull(Check.java:66)
    at
org.eclipse.emf.texo.model.ModelResolver.getModelDescriptor(ModelResolver.java:263)
    at
org.eclipse.emf.texo.model.ModelResolver.getModelObject(ModelResolver.java:208)
    at
org.eclipse.emf.texo.xml.ModelEMFConverter.createTarget(ModelEMFConverter.java:134)
    at
org.eclipse.emf.texo.xml.ModelEMFConverter.convert(ModelEMFConverter.java:86)
    at org.eclipse.emf.texo.xml.ModelXMLSaver.write(ModelXMLSaver.java:72)

To solve this: when you make use of certain parts of Texo at runtime you need to be sure that you have 'touched' the generated ModelPackage classes in your code somewhere. A generated ModelPackage automatically initializes itself when you refer to it in your code (see the generated INSTANCE static member).

NPE when de-serializing/reading from XML/XMI

When reading XML/XMI when you get the NPE below then you probably miss a namespace declaration in your XML schema.

Caused by: org.eclipse.emf.ecore.xmi.PackageNotFoundException: Package with uri 'null' not found. (, 2, 150)
	at org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectByType(XMLHandler.java:1307)
	at org.eclipse.emf.ecore.xmi.impl.XMLHandler.createTopObject(XMLHandler.java:1468)
	at org.eclipse.emf.ecore.xmi.impl.XMLHandler.processElement(XMLHandler.java:1019)
	at org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:1001)
	at org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:712)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:767)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1363)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDriver.scanRootElementHook(XMLDocumentScannerImpl.java:1318)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3103)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:922)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
	at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
	at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:264)
	... 5 more

A namespace can be defined in your XML Schema like this:

xmlns="http://my.model"
targetNamespace="http://my.model"

Where the URI should be a fully qualified URI, that gives the best results. For this namespace the code will generated in the model.my java package.