[SOLVED] Preference Page for my Plug-in does not Load [message #1062551] |
Sat, 08 June 2013 23:55 |
Kivanc Muslu Messages: 153 Registered: November 2010 |
Senior Member |
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Hi everyone,
My plug-in implements a simple preference page with the following code:
public class SolsticePreferencePage extends PreferencePage implements
IWorkbenchPreferencePage
The plug-in is singleton and is activated once one of its classes are loaded.
I extend Eclipse preferences with the following code in my plugin.xml:
<extension
id="com.kivancmuslu.www.solstice.preferences"
name="Solstice Preference Page"
point="org.eclipse.ui.preferencePages">
<page
class="com.kivancmuslu.www.solstice.server.SolsticePreferencePage"
id="com.kivancmuslu.www.solstice.preferences"
name="Solstice">
</page>
</extension>
This extension was working perfectly until recently (I don't know what caused the break though). However, now, when I test my plug-in, I can see the "Solstice" preference page in the preference menu, however when I click on it, I get the following error deterministically:
Unable to create the selected preference page.
java.lang.NullPointerException
at org.eclipse.ui.internal.util.BundleUtility.isActivated(BundleUtility.java:35)
at org.eclipse.ui.internal.util.BundleUtility.isActivated(BundleUtility.java:54)
at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:270)
at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceNode.createPage(WorkbenchPreferenceNode.java:47)
at org.eclipse.jface.preference.PreferenceDialog.createPage(PreferenceDialog.java:1340)
at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.createPage(FilteredPreferenceDialog.java:377)
at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1231)
at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:675)
at org.eclipse.jface.preference.PreferenceDialog$10.run(PreferenceDialog.java:709)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.preference.PreferenceDialog$9.selectionChanged(PreferenceDialog.java:705)
at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:888)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:886)
at org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:1226)
at org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:1251)
at org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:262)
at org.eclipse.jface.util.OpenStrategy.access$5(OpenStrategy.java:256)
at org.eclipse.jface.util.OpenStrategy$3.run(OpenStrategy.java:433)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:826)
at org.eclipse.jface.window.Window.open(Window.java:802)
at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:215)
at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:65)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1108)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:992)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:137)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:600)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:555)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
at org.eclipse.equinox.launcher.Main.main(Main.java:1426)
Error's session data:
eclipse.buildId=4.3.0.I20130314-1330
java.version=1.7.0_21
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.platform.ide
Command-line arguments: -product org.eclipse.platform.ide -data C:\Users\Kivanc\Eclipse Workspaces\Research/../runtime-Solstice_Core -dev file:C:/Users/Kivanc/Eclipse Workspaces/Research/.metadata/.plugins/org.eclipse.pde.core/Solstice_Core/dev.properties -os win32 -ws win32 -arch x86_64 -consoleLog
As you can see from the stack trace, the code being executed is completely in the Eclipse realm. Interestingly, the existing preference pages work allright (e.g., Run/Debug).
Does anyone have any idea what might be causing the error, or what might be the best way to debug it?
Best regards, thank you,
[Updated on: Fri, 21 June 2013 12:22] Report message to a moderator
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