Home » Modeling » EMF » derived, volatile, not changeable, BUT NOT transient: error on resource creation
| derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430354] |
Sat, 16 May 2009 14:44  |
 Philipp Kutter
Messages: 306
Registered: July 2009 |
Senior Member |
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Hi.
We have tons of models where a feature is
-derived
-volatile
-not-changeable
BUT we want to persist it, and thus it is NOT transient.
Take the following model (ecore is in the attached zip):
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<xsd:schema xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
xmlns:minimal="http://www.xocl.org/Minimal"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" ecore:nsPrefix="minimal"
ecore:package="org.examples.Minimal"
targetNamespace="http://www.xocl.org/Minimal">
<xsd:import namespace="http://www.eclipse.org/emf/2002/Ecore"
schemaLocation="platform:/plugin/org.eclipse.emf.ecore/model/Ecore.xsd "/>
<xsd:element ecore:ignore="true" name="MyClass" type="minimal:MyClass"/>
<xsd:complexType name="MyClass">
<xsd:attribute
ecore:changeable="false"
ecore:derived="true"
ecore:transient="false"
ecore:volatile="true"
name="tFdTvTchFmFattr01"
type="ecore:EString"/>
</xsd:complexType>
</xsd:schema>
and I want to create the following resource:
<?xml version="1.0" encoding="UTF-8"?>
<minimal:MyClass
xmlns:minimal="http://www.xocl.org/Minimal"
tFdTvTchFmFattr01="My Calculated String Value"
/>
Then, when I reopen the resource, because of changeable=fales, the value
of tFdTvTchFmFattr01 should not be set.
BUT, instead, already when I try to create the resource with the
generated editor I get:
XMIException: org.xml.sax.SAXParseException: Premature end of file.
(platform:/resource/test/My.minimal)
The full error is below.
Any idea?
Best, Philipp
org.eclipse.emf.ecore.xmi.XMIException: org.xml.sax.SAXParseException:
Premature end of file. (platform:/resource/test/My.minimal, 1, 1)
at
org.eclipse.emf.ecore.xmi.impl.XMLHandler.toXMIException(XML Handler.java:675)
at
org.eclipse.emf.ecore.xmi.impl.XMLHandler.fatalError(XMLHand ler.java:698)
at
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. fatalError(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.rep ortError(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFat alError(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl$PrologDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentS cannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(U nknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser .parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSA XParser.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(XMLRes ourceImpl.java:180)
at
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(Resour ceImpl.java:1494)
at
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(Resour ceImpl.java:1282)
at
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLo ad(ResourceSetImpl.java:255)
at
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLo adHelper(ResourceSetImpl.java:270)
at
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResou rce(ResourceSetImpl.java:397)
at
org.examples.Minimal.presentation.MinimalEditor.createModel( MinimalEditor.java:945)
at
org.examples.Minimal.presentation.MinimalEditor.createPages( MinimalEditor.java:1002)
at
org.eclipse.ui.part.MultiPageEditorPart.createPartControl(Mu ltiPageEditorPart.java:357)
at
org.eclipse.ui.internal.EditorReference.createPartHelper(Edi torReference.java:659)
at
org.eclipse.ui.internal.EditorReference.createPart(EditorRef erence.java:459)
at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:595)
at
org.eclipse.ui.internal.EditorReference.getPart(EditorRefere nce.java:821)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:31 3)
at
org.eclipse.ui.internal.presentations.PresentablePart.setVis ible(PresentablePart.java:180)
at
org.eclipse.ui.internal.presentations.util.PresentablePartFo lder.select(PresentablePartFolder.java:270)
at
org.eclipse.ui.internal.presentations.util.LeftToRightTabOrd er.select(LeftToRightTabOrder.java:65)
at
org.eclipse.ui.internal.presentations.util.TabbedStackPresen tation.selectPart(TabbedStackPresentation.java:473)
at
org.eclipse.ui.internal.PartStack.refreshPresentationSelecti on(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.jav a:1209)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:16 08)
at org.eclipse.ui.internal.PartStack.add(PartStack.java:499)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103 )
at org.eclipse.ui.internal.PartStack.add(PartStack.java:485)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112 )
at
org.eclipse.ui.internal.EditorSashContainer.addEditor(Editor SashContainer.java:63)
at
org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorA reaHelper.java:225)
at
org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAre aHelper.java:213)
at
org.eclipse.ui.internal.EditorManager.createEditorTab(Editor Manager.java:778)
at
org.eclipse.ui.internal.EditorManager.openEditorFromDescript or(EditorManager.java:677)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManag er.java:638)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched( WorkbenchPage.java:2854)
at
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(Workben chPage.java:2762)
at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPag e.java:2754)
at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.j ava:2705)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator .java:70)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2701)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2685)
at
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2668)
at
org.examples.Minimal.presentation.MinimalModelWizard.perform Finish(MinimalModelWizard.java:294)
at
org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDi alog.java:752)
at
org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDi alog.java:373)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.jav a:624)
at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListe ner.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3880)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3473)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825 )
at org.eclipse.jface.window.Window.open(Window.java:801)
at
org.eclipse.ui.internal.handlers.WizardHandler$New.executeHa ndler(WizardHandler.java:253)
at
org.eclipse.ui.internal.handlers.WizardHandler.execute(Wizar dHandler.java:273)
at
org.eclipse.ui.internal.handlers.HandlerProxy.execute(Handle rProxy.java:294)
at org.eclipse.core.commands.Command.executeWithChecks(Command. java:476)
at
org.eclipse.core.commands.ParameterizedCommand.executeWithCh ecks(ParameterizedCommand.java:508)
at
org.eclipse.ui.internal.handlers.HandlerService.executeComma nd(HandlerService.java:169)
at
org.eclipse.ui.internal.handlers.SlaveHandlerService.execute Command(SlaveHandlerService.java:241)
at
org.eclipse.ui.internal.actions.CommandAction.runWithEvent(C ommandAction.java:157)
at
org.eclipse.jface.action.ActionContributionItem.handleWidget Selection(ActionContributionItem.java:584)
at
org.eclipse.jface.action.ActionContributionItem.access$2(Act ionContributionItem.java:501)
at
org.eclipse.jface.action.ActionContributionItem$5.handleEven t(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3880)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3473)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22 21)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start (IDEApplication.java:113)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips eAppHandle.java:194)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .runApplication(EclipseAppLauncher.java:110)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .start(EclipseAppLauncher.java:79)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:368)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java: 559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
at
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. createSAXParseException(Unknown
Source)
... 99 more
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--------------070009020406080104060606--
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| Re: derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430356 is a reply to message #430354] |
Sat, 16 May 2009 16:13  |
Ed Merks
Messages: 33142
Registered: July 2009 |
Senior Member |
|
|
Philipp,
Comments below.
Philipp Kutter wrote:
> Hi.
> We have tons of models where a feature is
> -derived
> -volatile
> -not-changeable
>
> BUT we want to persist it, and thus it is NOT transient.
It sounds like perhaps you should be suppressing the setter rather than
making it transient because obviously when it's deserialized, it needs
to be set into the instance somehow...
>
> Take the following model (ecore is in the attached zip):
> <?xml version="1.0" encoding="UTF-8" standalone="no"?>
> <xsd:schema xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
> xmlns:minimal="http://www.xocl.org/Minimal"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema" ecore:nsPrefix="minimal"
> ecore:package="org.examples.Minimal"
> targetNamespace="http://www.xocl.org/Minimal">
> <xsd:import namespace="http://www.eclipse.org/emf/2002/Ecore"
> schemaLocation="platform:/plugin/org.eclipse.emf.ecore/model/Ecore.xsd "/>
> <xsd:element ecore:ignore="true" name="MyClass"
> type="minimal:MyClass"/>
>
> <xsd:complexType name="MyClass">
> <xsd:attribute
> ecore:changeable="false"
> ecore:derived="true"
> ecore:transient="false"
> ecore:volatile="true"
> name="tFdTvTchFmFattr01"
> type="ecore:EString"/>
> </xsd:complexType>
>
> </xsd:schema>
>
> and I want to create the following resource:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <minimal:MyClass
> xmlns:minimal="http://www.xocl.org/Minimal"
> tFdTvTchFmFattr01="My Calculated String Value"
> />
>
> Then, when I reopen the resource, because of changeable=fales, the
> value of tFdTvTchFmFattr01 should not be set.
If it's in the resource EMF will try to set it.
>
> BUT, instead, already when I try to create the resource with the
> generated editor I get:
>
> XMIException: org.xml.sax.SAXParseException: Premature end of file.
> (platform:/resource/test/My.minimal)
That's a SAX error though, so I wonder if you're showing the actual
resource here?
>
> The full error is below.
>
> Any idea?
>
> Best, Philipp
>
> org.eclipse.emf.ecore.xmi.XMIException: org.xml.sax.SAXParseException:
> Premature end of file. (platform:/resource/test/My.minimal, 1, 1)
> at
> org.eclipse.emf.ecore.xmi.impl.XMLHandler.toXMIException(XML Handler.java:675)
>
> at
> org.eclipse.emf.ecore.xmi.impl.XMLHandler.fatalError(XMLHand ler.java:698)
> at
> com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. fatalError(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.rep ortError(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFat alError(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl$PrologDriver.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerIm pl.next(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentS cannerImpl.scanDocument(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XML11Configuratio n.parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(U nknown
> Source)
> at
> com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser .parse(Unknown
> Source)
> at
> com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSA XParser.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(XMLRes ourceImpl.java:180)
>
> at
> org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(Resour ceImpl.java:1494)
>
> at
> org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(Resour ceImpl.java:1282)
>
> at
> org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLo ad(ResourceSetImpl.java:255)
>
> at
> org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLo adHelper(ResourceSetImpl.java:270)
>
> at
> org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResou rce(ResourceSetImpl.java:397)
>
> at
> org.examples.Minimal.presentation.MinimalEditor.createModel( MinimalEditor.java:945)
>
> at
> org.examples.Minimal.presentation.MinimalEditor.createPages( MinimalEditor.java:1002)
>
> at
> org.eclipse.ui.part.MultiPageEditorPart.createPartControl(Mu ltiPageEditorPart.java:357)
>
> at
> org.eclipse.ui.internal.EditorReference.createPartHelper(Edi torReference.java:659)
>
> at
> org.eclipse.ui.internal.EditorReference.createPart(EditorRef erence.java:459)
>
> at
> org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:595)
>
> at
> org.eclipse.ui.internal.EditorReference.getPart(EditorRefere nce.java:821)
> at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:31 3)
> at
> org.eclipse.ui.internal.presentations.PresentablePart.setVis ible(PresentablePart.java:180)
>
> at
> org.eclipse.ui.internal.presentations.util.PresentablePartFo lder.select(PresentablePartFolder.java:270)
>
> at
> org.eclipse.ui.internal.presentations.util.LeftToRightTabOrd er.select(LeftToRightTabOrder.java:65)
>
> at
> org.eclipse.ui.internal.presentations.util.TabbedStackPresen tation.selectPart(TabbedStackPresentation.java:473)
>
> at
> org.eclipse.ui.internal.PartStack.refreshPresentationSelecti on(PartStack.java:1256)
>
> at
> org.eclipse.ui.internal.PartStack.setSelection(PartStack.jav a:1209)
> at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:16 08)
> at org.eclipse.ui.internal.PartStack.add(PartStack.java:499)
> at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103 )
> at org.eclipse.ui.internal.PartStack.add(PartStack.java:485)
> at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112 )
> at
> org.eclipse.ui.internal.EditorSashContainer.addEditor(Editor SashContainer.java:63)
>
> at
> org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorA reaHelper.java:225)
>
> at
> org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAre aHelper.java:213)
>
> at
> org.eclipse.ui.internal.EditorManager.createEditorTab(Editor Manager.java:778)
>
> at
> org.eclipse.ui.internal.EditorManager.openEditorFromDescript or(EditorManager.java:677)
>
> at
> org.eclipse.ui.internal.EditorManager.openEditor(EditorManag er.java:638)
> at
> org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched( WorkbenchPage.java:2854)
>
> at
> org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(Workben chPage.java:2762)
>
> at
> org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPag e.java:2754)
> at
> org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.j ava:2705)
> at
> org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator .java:70)
> at
> org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2701)
> at
> org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2685)
> at
> org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2668)
> at
> org.examples.Minimal.presentation.MinimalModelWizard.perform Finish(MinimalModelWizard.java:294)
>
> at
> org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDi alog.java:752)
>
> at
> org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDi alog.java:373)
>
> at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.jav a:624)
> at
> org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListe ner.java:228)
> at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :84)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
> at
> org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3880)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3473)
> at org.eclipse.jface.window.Window.runEventLoop(Window.java:825 )
> at org.eclipse.jface.window.Window.open(Window.java:801)
> at
> org.eclipse.ui.internal.handlers.WizardHandler$New.executeHa ndler(WizardHandler.java:253)
>
> at
> org.eclipse.ui.internal.handlers.WizardHandler.execute(Wizar dHandler.java:273)
>
> at
> org.eclipse.ui.internal.handlers.HandlerProxy.execute(Handle rProxy.java:294)
>
> at
> org.eclipse.core.commands.Command.executeWithChecks(Command. java:476)
> at
> org.eclipse.core.commands.ParameterizedCommand.executeWithCh ecks(ParameterizedCommand.java:508)
>
> at
> org.eclipse.ui.internal.handlers.HandlerService.executeComma nd(HandlerService.java:169)
>
> at
> org.eclipse.ui.internal.handlers.SlaveHandlerService.execute Command(SlaveHandlerService.java:241)
>
> at
> org.eclipse.ui.internal.actions.CommandAction.runWithEvent(C ommandAction.java:157)
>
> at
> org.eclipse.jface.action.ActionContributionItem.handleWidget Selection(ActionContributionItem.java:584)
>
> at
> org.eclipse.jface.action.ActionContributionItem.access$2(Act ionContributionItem.java:501)
>
> at
> org.eclipse.jface.action.ActionContributionItem$5.handleEven t(ActionContributionItem.java:411)
>
> at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :84)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
> at
> org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3880)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3473)
> at
> org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:2405)
> at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
> at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22 21)
> at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
> at
> org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:332)
>
> at
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:493)
>
> at
> org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
> at
> org.eclipse.ui.internal.ide.application.IDEApplication.start (IDEApplication.java:113)
>
> at
> org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips eAppHandle.java:194)
>
> at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .runApplication(EclipseAppLauncher.java:110)
>
> at
> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher .start(EclipseAppLauncher.java:79)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:368)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:179)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java: 559)
> at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
> at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
> at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
> Caused by: org.xml.sax.SAXParseException: Premature end of file.
> at
> com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper. createSAXParseException(Unknown
> Source)
> ... 99 more
Ed Merks
Professional Support: https://www.macromodeling.com/
|
|
|
| Re: derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430358 is a reply to message #430356] |
Sat, 16 May 2009 16:48 |
Philipp Kutter
Messages: 306
Registered: July 2009 |
Senior Member |
|
|
Hi, Ed.
>> We have tons of models where a feature is
>> -derived
>> -volatile
>> -not-changeable
>>
>> BUT we want to persist it, and thus it is NOT transient.
> It sounds like perhaps you should be suppressing the setter rather than
> making it transient because obviously when it's deserialized, it needs
> to be set into the instance somehow...
I remember from the past how this works. Changeable only suppressed the
setter in the interface, while the implementation class still had it. True?
Why does it need to be set, when it is deserialized from a derived,
non-changeable, volatile feature?
And why would it not need to be deserialized, if the setter is suppressed?
>>
>> Take the following model (ecore is in the attached zip):
>> <?xml version="1.0" encoding="UTF-8" standalone="no"?>
>> <xsd:schema xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
....
>> </xsd:schema>
>>
>> and I want to create the following resource:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <minimal:MyClass
>> xmlns:minimal="http://www.xocl.org/Minimal"
>> tFdTvTchFmFattr01="My Calculated String Value"
>> />
>>
>> Then, when I reopen the resource, because of changeable=fales, the
>> value of tFdTvTchFmFattr01 should not be set.
> If it's in the resource EMF will try to set it.
>>
>> BUT, instead, already when I try to create the resource with the
>> generated editor I get:
>>
>> XMIException: org.xml.sax.SAXParseException: Premature end of file.
>> (platform:/resource/test/My.minimal)
> That's a SAX error though, so I wonder if you're showing the actual
> resource here?
No, as I wrote, I show the resource I would like to see.
The exception is triggered on the creation of the resource. But you are
right, there is as well a resource resulting from this, it is EMPTY.
I am looking forward to your answers to the questions above,
Regards, Philipp
|
|
|
| Re: derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430359 is a reply to message #430358] |
Sat, 16 May 2009 22:11 |
Ed Merks
Messages: 33142
Registered: July 2009 |
Senior Member |
|
|
Philipp,
Comments below.
Philipp Kutter wrote:
> Hi, Ed.
>
>>> We have tons of models where a feature is
>>> -derived
>>> -volatile
>>> -not-changeable
>>>
>>> BUT we want to persist it, and thus it is NOT transient.
>> It sounds like perhaps you should be suppressing the setter rather
>> than making it transient because obviously when it's deserialized, it
>> needs to be set into the instance somehow...
>
> I remember from the past how this works. Changeable only suppressed
> the setter in the interface, while the implementation class still had
> it. True?
No, although the lists returned from the getter never did enforced
read-only access, for single-valued features it's always been impossible
to set the value.
>
> Why does it need to be set, when it is deserialized from a derived,
> non-changeable, volatile feature?
If there is a serialized value the deserializer will always attempt to
set it.
>
> And why would it not need to be deserialized, if the setter is
> suppressed?
If the setter is suppressed, the generated Impl will still have a setter
and reflectively you'll still be able to set it. It's just that via the
generated API there will be no public setter available so it will be
"hard" to set it.
>>>
>>> Take the following model (ecore is in the attached zip):
>>> <?xml version="1.0" encoding="UTF-8" standalone="no"?>
>>> <xsd:schema xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore"
> ...
>>> </xsd:schema>
>>>
>>> and I want to create the following resource:
>>>
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <minimal:MyClass
>>> xmlns:minimal="http://www.xocl.org/Minimal"
>>> tFdTvTchFmFattr01="My Calculated String Value"
>>> />
>>>
>>> Then, when I reopen the resource, because of changeable=fales, the
>>> value of tFdTvTchFmFattr01 should not be set.
>> If it's in the resource EMF will try to set it.
>>>
>>> BUT, instead, already when I try to create the resource with the
>>> generated editor I get:
>>>
>>> XMIException: org.xml.sax.SAXParseException: Premature end of file.
>>> (platform:/resource/test/My.minimal)
>> That's a SAX error though, so I wonder if you're showing the actual
>> resource here?
>
> No, as I wrote, I show the resource I would like to see.
I'm not sure that EMF's reaction to the SAX calls could make SAX thing
the XML ended prematurely....
>
> The exception is triggered on the creation of the resource. But you
> are right, there is as well a resource resulting from this, it is EMPTY.
I'd have to see this in action. It's possible that there's a bug but
the exception seems a basic SAX one reacting to the actual premature end
of the XML itself...
>
>
> I am looking forward to your answers to the questions above,
>
> Regards, Philipp
Ed Merks
Professional Support: https://www.macromodeling.com/
|
|
|
| Re: derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430362 is a reply to message #430359] |
Sun, 17 May 2009 12:14 |
Philipp Kutter
Messages: 306
Registered: July 2009 |
Senior Member |
|
|
>> Why does it need to be set, when it is deserialized from a derived,
>> non-changeable, volatile feature?
> If there is a serialized value the deserializer will always attempt to
> set it.
Understood. Thus if I want to support derived, volatile, non-transient
features, which means the feature is serialized, I need to make sure
that the setter is doing something useful. As there are many useful
things one could think of (ignore the content, keep it as history,
e.t.c., I would not argue that you must generate something else than an
exception here... although, I might be tempted to file an enhancement
bugzilla...)
Would you agree that derived, volatile, non-transient features are a
conceptually sound way to have derived features been serialized?
The answer is important to me, as I want to continue these tests to more
advanced use cases. Agreement that this is a useful use case is thus
important to me ;-)
>>>> BUT, instead, already when I try to create the resource with the
>>>> generated editor I get:
>>>>
>>>> XMIException: org.xml.sax.SAXParseException: Premature end of file.
>>>> (platform:/resource/test/My.minimal)
>>> That's a SAX error though, so I wonder if you're showing the actual
>>> resource here?
>>
>> No, as I wrote, I show the resource I would like to see.
> I'm not sure that EMF's reaction to the SAX calls could make SAX thing
> the XML ended prematurely....
I will further test in which configurations the attached minimal ECore
will trigger a SAY Exception and file a bug report. Do you agree?
Regards, Philipp
|
|
|
| Re: derived, volatile, not changeable, BUT NOT transient: error on resource creation [message #430363 is a reply to message #430362] |
Sun, 17 May 2009 13:33 |
Ed Merks
Messages: 33142
Registered: July 2009 |
Senior Member |
|
|
Philipp,
Comments below.
Philipp Kutter wrote:
>
>>> Why does it need to be set, when it is deserialized from a derived,
>>> non-changeable, volatile feature?
>> If there is a serialized value the deserializer will always attempt
>> to set it.
>
> Understood. Thus if I want to support derived, volatile, non-transient
> features, which means the feature is serialized, I need to make sure
> that the setter is doing something useful.
Yes, if you're going to save the data, you need to away to accept in on
the way back in.
> As there are many useful things one could think of (ignore the
> content, keep it as history, e.t.c., I would not argue that you must
> generate something else than an exception here... although, I might be
> tempted to file an enhancement bugzilla...)
I'd not be likely to make such enhancements.
>
> Would you agree that derived, volatile, non-transient features are a
> conceptually sound way to have derived features been serialized?
It seems odd to have a derived thing be serialized.
>
> The answer is important to me, as I want to continue these tests to more
> advanced use cases. Agreement that this is a useful use case is thus
> important to me ;-)
It seems odd. Why serialize something that's derived. For example,
eAllSuperTypes is derived from eSuperTypes and it would be rather
useless (worse than useless, because it could lead to inconsistency) to
serialize it.
>
>>>>> BUT, instead, already when I try to create the resource with the
>>>>> generated editor I get:
>>>>>
>>>>> XMIException: org.xml.sax.SAXParseException: Premature end of
>>>>> file. (platform:/resource/test/My.minimal)
>>>> That's a SAX error though, so I wonder if you're showing the actual
>>>> resource here?
>>>
>>> No, as I wrote, I show the resource I would like to see.
>> I'm not sure that EMF's reaction to the SAX calls could make SAX
>> thing the XML ended prematurely....
>
> I will further test in which configurations the attached minimal ECore
> will trigger a SAY Exception and file a bug report. Do you agree?
Yes. I can't imagine how SAX will report a premature end unless the XML
actually ends prematurely.
>
> Regards, Philipp
Ed Merks
Professional Support: https://www.macromodeling.com/
|
|
|
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