[jbosstools-issues] [JBoss JIRA] (JBIDE-18532) NPE in VPV Editor

[Victor Rubezhny (JIRA)]

Victor Rubezhny created JBIDE-18532:
---------------------------------------

             Summary: NPE in VPV Editor
                 Key: JBIDE-18532
                 URL: https://issues.jboss.org/browse/JBIDE-18532
             Project: Tools (JBoss Tools)
          Issue Type: Bug
          Components: visual-page-editor-core
    Affects Versions: 4.2.0.CR1
            Reporter: Victor Rubezhny


NullPointerException occurs when switching from VPV Editor to HTML Editor.

It looks like VPV Editor doesn't clean up some resources (like listeners) when it's closed.

{code}
!ENTRY org.eclipse.wst.sse.core 4 4 2014-10-08 03:45:40.608
!MESSAGE 
!STACK 0
java.lang.NullPointerException
	at org.jboss.tools.vpe.preview.editor.VpvEditor$10.documentChanged(VpvEditor.java:723)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument._fireDocumentChanged(BasicStructuredDocument.java:460)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.fireStructuredDocumentEvent(BasicStructuredDocument.java:1184)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.internalReplaceText(BasicStructuredDocument.java:1964)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replaceText(BasicStructuredDocument.java:2423)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replaceText(BasicStructuredDocument.java:2408)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.access$2(JobSafeStructuredDocument.java:1)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument$3.run(JobSafeStructuredDocument.java:141)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.wst.sse.ui.EditorExecutionContext.execute(EditorExecutionContext.java:149)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.replaceText(JobSafeStructuredDocument.java:144)
	at org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replace(BasicStructuredDocument.java:2368)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.access$0(JobSafeStructuredDocument.java:1)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument$1.run(JobSafeStructuredDocument.java:103)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.wst.sse.ui.EditorExecutionContext.execute(EditorExecutionContext.java:149)
	at org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.replace(JobSafeStructuredDocument.java:106)
	at org.eclipse.jface.text.projection.ProjectionTextStore.replace(ProjectionTextStore.java:111)
	at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1184)
	at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1210)
	at org.eclipse.jface.text.projection.ProjectionDocument.replace(ProjectionDocument.java:629)
	at org.eclipse.jface.text.DefaultDocumentAdapter.replaceTextRange(DefaultDocumentAdapter.java:248)
	at org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:7268)
	at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:8111)
	at org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2481)
	at org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5955)
	at org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5986)
	at org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:5663)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1412)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1397)
	at org.eclipse.swt.widgets.Widget.sendIMKeyEvent(Widget.java:1474)
	at org.eclipse.swt.widgets.Control.gtk_commit(Control.java:3043)
	at org.eclipse.swt.widgets.Canvas.gtk_commit(Canvas.java:163)
	at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2079)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:5510)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4700)
	at org.eclipse.swt.internal.gtk.OS._gtk_im_context_filter_keypress(Native Method)
	at org.eclipse.swt.internal.gtk.OS.gtk_im_context_filter_keypress(OS.java:8499)
	at org.eclipse.swt.widgets.Control.filterKey(Control.java:2386)
	at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3262)
	at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:777)
	at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2098)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:5510)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4700)
	at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
	at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9074)
	at org.eclipse.swt.widgets.Display.eventProc(Display.java:1253)
	at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
	at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2473)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3439)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	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:382)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)

{code}



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