java.lang.NullPointerException when I try to open a gradle file in my home folder

[wodencafe]

Hi all,

the Nodeclipse gradle editor works fine when opening gradle files in my projects.

However, in this instance I am trying to open a build.gradle file in my home folder, not in an eclipse workspace.

When I try to open the file, this error happens, and the file does not open:

Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
java.lang.NullPointerException
	at org.nodeclipse.enide.editors.gradle.editors.GradleOutline$ContentProvider.getElements(GradleOutline.java:152)
	at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:995)
	at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:701)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1340)
	at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:341)
	at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:901)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:618)
	at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$0(AbstractTreeViewer.java:814)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:792)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:595)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:763)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1527)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:771)
	at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$1(AbstractTreeViewer.java:1512)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1447)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:354)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1408)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1506)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:286)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1685)
	at org.nodeclipse.enide.editors.gradle.editors.GradleOutline.createControl(GradleOutline.java:67)
	at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:131)
	at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:385)
	at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:728)
	at org.eclipse.ui.part.PageBookView$1.partActivated(PageBookView.java:1028)
	at org.eclipse.ui.internal.WorkbenchPage$15.run(WorkbenchPage.java:4999)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4996)
	at org.eclipse.ui.internal.WorkbenchPage.access$19(WorkbenchPage.java:4975)
	at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:212)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:250)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:247)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:756)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:681)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:676)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1186)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3261)
	at org.eclipse.ui.internal.WorkbenchPage.access$25(WorkbenchPage.java:3176)
	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:3158)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3153)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3117)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3098)
	at org.eclipse.ui.ide.IDE.openEditorOnFileStore(IDE.java:1393)
	at org.eclipse.ui.internal.ide.actions.OpenLocalFileAction.run(OpenLocalFileAction.java:97)
	at org.eclipse.ui.internal.ide.actions.OpenLocalFileAction.run(OpenLocalFileAction.java:70)
	at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:247)
	at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:219)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
	at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5268)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1348)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4522)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4107)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

System Details:

eclipse.buildId=4.7.1.M20170906-1700
java.version=1.8.0_131
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.java.product
Command-line arguments:  -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product

[paulvi]

Hi, thanks for feedback. This is unexpected, possibly some Eclipse API changes.

Problem is within Outline.
And it should not depend on when the file is.
But the file content. Can you share the file that causes error?

Can you also try close Outline View, and try open the file.