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NullPointerException in ActivitiDiagramMatchingStrategy

Question asked by mmaker1234 on May 21, 2013
Latest reply on May 21, 2013 by tiesebarrell
Hello Activiti developers,

I have Eclipse 4.2 (Juno) SR2 and everything run fine until I installed Activiti Designer 5.12. Then the following problem occurred: while editing Java code (usually but not mandatory in the Java perspective) and select "Open Declaration", "Open Implementation" or "Open Super Implementation" from the mouse context menu (holding the Control key point to a method invocation) the desired action is not executed and the error log demonstrates the following exception:[java]eclipse.buildId=M20130204-1200
java.version=1.6.0_43
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product

Error
Tue May 21 13:49:28 EEST 2013


org.eclipse.e4.core.di.InjectionException: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred
   at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
   at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231)
   at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212)
   at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
   at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:277)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:496)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:547)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:368)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:314)
   at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:83)
   at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
   at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
   at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)
   at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
   at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
   at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
   at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1100)
   at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1823)
   at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:4892)
   at org.eclipse.swt.widgets.Control.windowProc(Control.java:4560)
   at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
   at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989)
   at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
   at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2546)
   at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3756)
   at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
   at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
   at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
   at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
   at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
   at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
   at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
   at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
   at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
   at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
   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(EclipseStarter.java:353)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
   at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
   at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
Caused by: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred
   at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:124)
   at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
   … 46 more
Caused by: java.lang.NullPointerException
   at org.activiti.designer.eclipse.editor.ActivitiDiagramMatchingStrategy.matches(ActivitiDiagramMatchingStrategy.java:20)
   at org.eclipse.ui.internal.WorkbenchPage.checkEditor(WorkbenchPage.java:2225)
   at org.eclipse.ui.internal.WorkbenchPage.findEditors(WorkbenchPage.java:2194)
   at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2997)
   at org.eclipse.ui.internal.WorkbenchPage.access$22(WorkbenchPage.java:2969)
   at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2951)
   at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
   at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2947)
   at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2911)
   at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2902)
   at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:373)
   at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:179)
   at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)
   at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:174)
   at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:279)
   at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
   at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
   at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119)
   … 52 more
[/java]Please advise some solution.

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