java.lang.ArrayIndexOutOfBoundsException trying to open dslr files in eclipse

[Vito De Tullio]

Hi

I'm using Eclipse (Version: 2019-12 (4.14.0) / Build id: 20191212-1212) and JBoss Drools (7.32.0.Final).

I've created a Drools Project, and a new Rule Resource following the wizard and checking the tick "Use a DSL".

A file .dslr is created.

If I try to open it, unfortunately, all I have is an error "Failed to create the part's controls" with the following stacktrace:

java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
    at org.eclipse.swt.custom.StyledTextRenderer.getLineSize(StyledTextRenderer.java:309)
    at org.eclipse.swt.custom.StyledTextRenderer.reset(StyledTextRenderer.java:1330)
    at org.eclipse.swt.custom.StyledText.resetCache(StyledText.java:8093)
    at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:10301)
    at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:10472)
    at org.eclipse.jface.text.TextViewer.applyTextPresentation(TextViewer.java:4718)
    at org.eclipse.jface.text.TextViewer.changeTextPresentation(TextViewer.java:4768)
    at org.eclipse.jface.text.presentation.PresentationReconciler.applyTextRegionCollection(PresentationReconciler.java:562)
    at org.eclipse.jface.text.presentation.PresentationReconciler.processDamage(PresentationReconciler.java:551)
    at org.eclipse.jface.text.presentation.PresentationReconciler.access$3(PresentationReconciler.java:547)
    at org.eclipse.jface.text.presentation.PresentationReconciler$InternalListener.inputDocumentChanged(PresentationReconciler.java:121)
    at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2769)
    at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2810)
    at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:663)
    at org.eclipse.jface.text.source.projection.ProjectionViewer.setDocument(ProjectionViewer.java:368)
    at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:613)
    at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:4015)
    at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3485)
    at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:64)
    at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:454)
    at org.drools.eclipse.editors.AbstractRuleEditor.createPartControl(AbstractRuleEditor.java:79)
    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:227)
    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:333)
    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:203)
    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:315)
    at org.drools.eclipse.dsl.editor.DSLRuleEditor2.addPages(DSLRuleEditor2.java:64)
    at org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:143)
    at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:333)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:154)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:96)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:361)
    at jdk.internal.reflect.GeneratedMethodAccessor178.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:567)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:1002)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:967)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:139)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:408)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:331)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:1002)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:662)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:768)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:739)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:733)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:717)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:107)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:146)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:4629)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
    at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:234)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
    at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
    at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
    at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
    at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
    at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
    at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
    at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElementGen(ElementContainerImpl.java:170)
    at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:188)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:661)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:625)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:790)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1239)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3207)
    at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3112)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3110)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3080)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3071)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:570)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:525)
    at org.drools.eclipse.wizard.rule.NewRulePackagePage.finish(NewRulePackagePage.java:161)
    at org.drools.eclipse.wizard.rule.NewRulePackageWizard.performFinish(NewRulePackageWizard.java:50)
    at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:832)
    at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:472)
    at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:619)
    at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:84)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4175)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3988)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3587)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:823)
    at org.eclipse.jface.window.Window.open(Window.java:799)
    at org.eclipse.ui.internal.handlers.WizardHandler$New.executeHandler(WizardHandler.java:260)
    at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:280)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:283)
    at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97)
    at jdk.internal.reflect.GeneratedMethodAccessor137.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:567)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:318)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:252)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
    at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
    at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
    at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:389)
    at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:142)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:579)
    at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:413)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4175)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3988)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3587)
    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:660)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:559)
    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:567)
    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:1465)

Can you help me about it?

Thanks

[Joe Irudayaraj]

I doubt the drools plugin support the 2019 eclipse version, The last stable version is oxygen

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[Vito De Tullio]

I found https://issues.redhat.com/browse/DROOLS-2793 ... this bug is from 2018...

should I ignore the eclipse plugin as is left bitrot? Is there some better approach to create / edit rules?

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[Joe Irudayaraj]

Regarding dslr files,The best bet would be Eclipse Oxygen,Not sure business central supports content assist.

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[Emmanuel Ayodele]

There is a possibility that the selected editor is not correctly associated with the file type. 

To fix this go to Preferences>>General>>Editors>>File Association

for the *.dslr file type use Rule Editor. If it's not already on the list click on add and select from the list then set it to default.