| Using business objects with GMF, newbie question [message #184022] |
Wed, 23 April 2008 10:26  |
 Phil
Messages: 3
Registered: July 2009 |
Junior Member |
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I am experimenting with the GMF framework (I am now into week 2 of playing with it).
I wish to use it in a way that is slightly different to standard:
I have business objects that already exist and cannot be modified.
These objects are saved in an xml file with a defined xsd (different to the format used by GMF)
I wish to load, display, edit and save these objects.
I am now quite confident using the GMF tools, and have made an diagram editor which works. I can save the model in the correct xml format, but unfortunately I am having problems loading the diagram initially.
My current approach is to override the document provider and replace the line
Diagram diagram = DiagramIOUtil.load( domain, storage, true, getProgressMonitor() );
with my own code.
Diagram diagram = myLoader();
private Diagram myLoader() {
SimpleEmfGraph simpleGraph = ModelFactoryImpl.eINSTANCE.createSimpleEmfGraph();
SimpleEmfNode node1 = ModelFactoryImpl.eINSTANCE.createSimpleEmfNode();
SimpleEmfNode node2 = ModelFactoryImpl.eINSTANCE.createSimpleEmfNode();
SimpleEmfEdge edge = ModelFactoryImpl.eINSTANCE.createSimpleEmfEdge();
edge.setInNode( node1 );
edge.setOutNode( node2 );
simpleGraph.getEdges().add( edge );
simpleGraph.getNodes().add( node1 );
simpleGraph.getNodes().add( node2 );
final Diagram diagram = makeEmptyDiagram();
diagram.setElement( simpleGraph );
return diagram;
}
private Diagram makeEmptyDiagram() {
SimpleEmfGraph model = ModelFactoryImpl.eINSTANCE.createSimpleEmfGraph();
return ViewService.createDiagram( model, SimpleEmfGraphEditPart.MODEL_ID, SimpleEmfGraphDiagramEditorPlugin.DIAGRAM_PREFERENCES_HINT );
}
Sadly this approach doesn't work. I get
java.lang.NullPointerException
at org.eclipse.gmf.runtime.diagram.core.util.ViewUtil.getIdStr( ViewUtil.java:642)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.getWo rkspaceViewerPreferenceStore(DiagramEditor.java:1271)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.confi gureGraphicalViewer(DiagramEditor.java:827)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.creat eGraphicalViewer(DiagramEditor.java:793)
at org.eclipse.gef.ui.parts.GraphicalEditor.createPartControl(G raphicalEditor.java:163)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor.creat ePartControl(DiagramEditor.java:1548)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditorWithFl yOutPalette.createPartControl(DiagramEditorWithFlyOutPalette .java:310)
at org.eclipse.gmf.runtime.diagram.ui.resources.editor.parts.Di agramDocumentEditor.createPartControl(DiagramDocumentEditor. java:1459)
at org.eclipse.ui.internal.EditorReference.createPartHelper(Edi torReference.java:661)
at org.eclipse.ui.internal.EditorReference.createPart(EditorRef erence.java:426)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb enchPartReference.java:592)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:29 9)
at org.eclipse.ui.internal.presentations.PresentablePart.setVis ible(PresentablePart.java:179)
at org.eclipse.ui.internal.presentations.util.PresentablePartFo lder.select(PresentablePartFolder.java:268)
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:400)
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 04)
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:217)
at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAre aHelper.java:207)
at org.eclipse.ui.internal.EditorManager.createEditorTab(Editor Manager.java:774)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescript or(EditorManager.java:673)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManag er.java:634)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched( WorkbenchPage.java:2737)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(Workben chPage.java:2651)
at org.eclipse.ui.internal.WorkbenchPage.access$13(WorkbenchPag e.java:2643)
at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.j ava:2595)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator .java:67)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2590)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPa ge.java:2574)
at org.eclipse.ui.actions.OpenWithMenu.openEditor(OpenWithMenu. java:340)
at org.eclipse.ui.actions.OpenWithMenu.access$0(OpenWithMenu.ja va:328)
at org.eclipse.ui.actions.OpenWithMenu$3.handleEvent(OpenWithMe nu.java:226)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3682)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :3293)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:2389)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22 19)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at org.eclipse.core.databinding.observable.Realm.runWithDefault (Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:149)
Clearly I haven't set something up: but I don't know what it is.
I would appreciate some advice on the approach I am taking, and if it is the correct one, what am I not setting up?
Thanks for the help
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