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JavaUI.getWorkingCopyManager() => NullPointerException [message #298831]

Mon, 06 February 2006 05:05

Eclipse User

Originally posted by: timbo.web.de

Hi,

when I call this methode, it throws a NullPointerException. Can anybody
help me?

Thx Tim

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298875 is a reply to message #298831]

Mon, 06 February 2006 14:16

Eclipse User

Originally posted by: richkulp.us.NO_SPAM.ibm.com

Are you running under Eclipse? This method is only valid when running as
an Eclipse plugin.

Tim wrote:
> Hi,
>
> when I call this methode, it throws a NullPointerException. Can anybody
> help me?
>
> Thx Tim
>

--
Thanks,
Rich Kulp

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298892 is a reply to message #298875]

Tue, 07 February 2006 04:31

Eclipse User

Originally posted by: timbo.web.de

Rich Kulp wrote:

> Are you running under Eclipse? This method is only valid when running as
> an Eclipse plugin.

Yes, I'm running this method in a plugin, I created a view, which should
access the WorkingCopyManager.

JavaPlugin.getDefault().getWorkingCopyManager();

also doesn't work

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298919 is a reply to message #298892]

Tue, 07 February 2006 10:15

Eclipse User

Originally posted by: richkulp.us.NO_SPAM.ibm.com

I don't know why you are getting an NPE, but you shouldn't be using
JavaPlugin. That is an internal class. You should be using:

JavaUI.getWorkingCopyManager()

This is the API way of getting it.

However, this begs the question because under the covers this method
does JavaPlugin.getDefault().getWorkingCopyManager().

What line exactly gives the NPE? What does the stack trace say. If it
says that JavaPlugin.getDefault() return null, then this shouldn't
happen because that can only happen if the jdt ui plugin did not
initialize correctly.

So what is in your .log file, what stack trace?

--
Thanks,
Rich Kulp

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298924 is a reply to message #298919]

Tue, 07 February 2006 11:29

Eclipse User

Originally posted by: timbo.web.de

when i call JavaUI.getWorkingCopyManager() I get this exception

!ENTRY org.eclipse.ui 4 4 2006-02-07 17:01:58.686
!MESSAGE Unhandled event loop exception

!ENTRY org.eclipse.ui 4 0 2006-02-07 17:01:58.701
!MESSAGE java.lang.NullPointerException
!STACK 0
java.lang.NullPointerException
at org.eclipse.jdt.ui.JavaUI.getWorkingCopyManager(JavaUI.java: 616)
at
test.plugin.TestWorkingCopyManagerAction.run(TestWorkingCopy ManagerAction.java:31)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:996 )
at
org.eclipse.jface.action.ActionContributionItem.handleWidget Selection(ActionContributionItem.java:538)
at
org.eclipse.jface.action.ActionContributionItem.access$2(Act ionContributionItem.java:488)
at
org.eclipse.jface.action.ActionContributionItem$5.handleEven t(ActionContributionItem.java:400)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java (Compiled
Code))
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3125)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :2758)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplicatio n.java:103)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(Pl atformActivator.java:226)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:376)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:163)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:85)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:58)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe thodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334 )
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298932 is a reply to message #298924]

Tue, 07 February 2006 13:44

Eclipse User

Originally posted by: richkulp.us.NO_SPAM.ibm.com

What version of Eclipse and JDT are you using because my Eclipse/JDT is
I20060131 and JavaUI line 616 is no where near the
getWorkingCopyManager class.

But looking at the code I'm willing to bet it is because
JavaPlugin.getDefault() is returning null.

There is something funny about your setup. Can up bring up a straight
java editor? Does that work in your setup?

Tim wrote:
> when i call JavaUI.getWorkingCopyManager() I get this exception
>
>
> !ENTRY org.eclipse.ui 4 4 2006-02-07 17:01:58.686
> !MESSAGE Unhandled event loop exception
>
> !ENTRY org.eclipse.ui 4 0 2006-02-07 17:01:58.701
> !MESSAGE java.lang.NullPointerException
> !STACK 0
> java.lang.NullPointerException
> at org.eclipse.jdt.ui.JavaUI.getWorkingCopyManager(JavaUI.java: 616)
> at

--
Thanks,
Rich Kulp

Re: JavaUI.getWorkingCopyManager() => NullPointerException [message #298974 is a reply to message #298924]

Wed, 08 February 2006 11:23

Eclipse User

Originally posted by: daniel.megert.eclipse.org

Tim wrote:

> when i call JavaUI.getWorkingCopyManager() I get this exception

Does your plugin.xml or manifest.mf declare to depend on
org.eclipse.jdt.ui? Are there any other messages in .log?

Dani

>
>
> !ENTRY org.eclipse.ui 4 4 2006-02-07 17:01:58.686
> !MESSAGE Unhandled event loop exception
>
> !ENTRY org.eclipse.ui 4 0 2006-02-07 17:01:58.701
> !MESSAGE java.lang.NullPointerException
> !STACK 0
> java.lang.NullPointerException
> at org.eclipse.jdt.ui.JavaUI.getWorkingCopyManager(JavaUI.java: 616)
> at
> test.plugin.TestWorkingCopyManagerAction.run(TestWorkingCopy ManagerAction.java:31)
>
> at org.eclipse.jface.action.Action.runWithEvent(Action.java:996 )
> at
> org.eclipse.jface.action.ActionContributionItem.handleWidget Selection(ActionContributionItem.java:538)
>
> at
> org.eclipse.jface.action.ActionContributionItem.access$2(Act ionContributionItem.java:488)
>
> at
> org.eclipse.jface.action.ActionContributionItem$5.handleEven t(ActionContributionItem.java:400)
>
> at
> org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java (Compiled
> Code))
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
> at
> org.eclipse.swt.widgets.Display.runDeferredEvents(Display.ja va:3125)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java :2758)
> at
> org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.jav a:1699)
> at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
> at
> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work bench.java:367)
>
> at
> org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j ava:143)
> at
> org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplicatio n.java:103)
> at
> org.eclipse.core.internal.runtime.PlatformActivator$1.run(Pl atformActivator.java:226)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:376)
>
> at
> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS tarter.java:163)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:85)
>
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce ssorImpl.java:58)
>
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe thodAccessorImpl.java:60)
>
> at java.lang.reflect.Method.invoke(Method.java:391)
> at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334 )
> at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
> at org.eclipse.core.launcher.Main.run(Main.java:973)
> at org.eclipse.core.launcher.Main.main(Main.java:948)
>

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