Bug 62612 NPE in EclipsePreferences.internalGet(...)
I200405171219 + ZRH smoke plugin-export 20040518_1115 After start and shutdown of the Buildmeister runtime I found the following exception. It looks like getTextPreferenceKey() in AbstractAnnotationHover#getHoverInfo() at line 83 returned null. java.lang.NullPointerException at org.eclipse.core.internal.preferences.EclipsePreferences.internalGet(EclipsePreferences.java:479) at org.eclipse.core.internal.preferences.EclipsePreferences.get(EclipsePreferences.java:349) at org.eclipse.core.internal.preferences.PreferenceForwarder.contains(PreferenceForwarder.java:181) at org.eclipse.ui.plugin.AbstractUIPlugin$CompatibilityPreferenceStore.contains(AbstractUIPlugin.java:277) at org.eclipse.ui.texteditor.ChainedPreferenceStore.getVisibleStore(ChainedPreferenceStore.java:525) at org.eclipse.ui.texteditor.ChainedPreferenceStore.getBoolean(ChainedPreferenceStore.java:166) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractAnnotationHover.getHoverInfo(AbstractAnnotationHover.java:83) at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo(BestMatchHover.java:102) at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo(JavaEditorTextHoverProxy.java:69) at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:161)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
Point hoverEventLocation= textViewerExtension2.getHoverEventLocation();
			int offset= computeOffsetAtLocation(sourceViewer, hoverEventLocation.x, hoverEventLocation.y);
			if (offset == -1) {
				fTextOperationAction.run();
				return;				
			}				
			try {
				
				String contentType= TextUtilities.getContentType(sourceViewer.getDocument(), IJavaPartitions.JAVA_PARTITIONING, offset, true);
				IRegion hoverRegion= textHover.getHoverRegion(sourceViewer, offset);						
				if (hoverRegion == null)
					return;
				
				String hoverInfo= textHover.getHoverInfo(sourceViewer, hoverRegion);
				IInformationControlCreator controlCreator= null;				
				if (textHover instanceof IInformationProviderExtension2)
					controlCreator= ((IInformationProviderExtension2)textHover).getInformationPresenterControlCreator();
	
				IInformationProvider informationProvider= new InformationProvider(hoverRegion, hoverInfo, controlCreator);
				fInformationPresenter.setOffset(offset);	
				fInformationPresenter.setDocumentPartitioning(IJavaPartitions.JAVA_PARTITIONING);
				fInformationPresenter.setInformationProvider(informationProvider, contentType);
				fInformationPresenter.showInformation();
			} catch (BadLocationException e) {				
			}
		}
		
		private int computeOffsetAtLocation(ITextViewer textViewer, int x, int y) {
			
			StyledText styledText= textViewer.getTextWidget();