[jbosstools-issues] [JBoss JIRA] Commented: (JBIDE-5080) java.lang.ClassCastException: $Proxy0 cannot be cast to org.mozilla.interfaces.nsIWebBrowser after updating JBT to Version: 1.1.0.v200910220041N-H228-M4

[Max Rydahl Andersen (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBIDE-5080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12493941#action_12493941 ] 

Max Rydahl Andersen commented on JBIDE-5080:
--------------------------------------------

>From Maxim on irc:

No, It's related to this. I have mean that it's not related to eclipse update. The interfaces from 1.9 not compatible with 1.8, so we should declare the minimal required version in the xpcom
[12:55] <@max_at_hibernate> aah
[12:55] <@max_at_hibernate> so it simply doesn't update to 1.8, it stays on 1.8 and it fails ?
[13:00] <mareshkau> It's updates to 1.9 but eclipse loads both versions 1.8 and 1.9 of org.mozilla.xpcom(not declared as singleton) and plugins which use org.mozilla.xpcom not declare minimal version of xpcom, so it's use 1.8 or 1.9 and as result class cast exception

> java.lang.ClassCastException: $Proxy0 cannot be cast to org.mozilla.interfaces.nsIWebBrowser after updating JBT to Version: 1.1.0.v200910220041N-H228-M4
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBIDE-5080
>                 URL: https://jira.jboss.org/jira/browse/JBIDE-5080
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: Visual Page Editor core
>    Affects Versions: 3.1.0.M4
>            Reporter: Anton Klimkovich
>            Assignee: Denis Golovin
>            Priority: Blocker
>             Fix For: 3.1.0.CR1
>
>
> EXECUTE: Update JBT to Version: 1.1.0.v200910220041N-H228-M4 using update site
> EXECUTE: Open any xhtml page
> FAILURE:   
> java.lang.ClassCastException: $Proxy0 cannot be cast to org.mozilla.interfaces.nsIWebBrowser
> at org.jboss.tools.vpe.xulrunner.browser.XulRunnerBrowser.<init>(XulRunnerBrowser.java:89)
> at org.jboss.tools.vpe.xulrunner.editor.XulRunnerEditor.<init>(XulRunnerEditor.java:135)
> at org.jboss.tools.vpe.editor.mozilla.MozillaPreview$1.<init>(MozillaPreview.java:58)
> at org.jboss.tools.vpe.editor.mozilla.MozillaPreview.createPartControl(MozillaPreview.java:58)
> at org.jboss.tools.vpe.editor.VpeEditorPart.createPreviewBrowser(VpeEditorPart.java:925)
> at org.jboss.tools.jst.jsp.jspeditor.JSPMultiPageEditor.pageChange(JSPMultiPageEditor.java:217)
> at org.jboss.tools.jst.jsp.jspeditor.JSPMultiPageEditorPart$2.widgetSelected(JSPMultiPageEditorPart.java:106)
> at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
> at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
> at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:770)
> at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3256)
> at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2045)
> at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:323)
> at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
> at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3880)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3473)
> at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
> at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
> at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
> at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
> at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
> at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
> at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
> at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
> at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
> 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:368)
> at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
> at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
> at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

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