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/text/java/hover/AbstractAnnotationHover.java
*/
	public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
		
		if (getEditor() == null)
			return null;
		
		IDocumentProvider provider= JavaPlugin.getDefault().getCompilationUnitDocumentProvider();
		IAnnotationModel model= provider.getAnnotationModel(getEditor().getEditorInput());
		
		if (model != null) {
			Iterator e= new JavaAnnotationIterator(model, true, fAllAnnotations);
			int layer= -1;
			String message= null;
			while (e.hasNext()) {
				Annotation a= (Annotation) e.next();
				AnnotationPreference preference= getAnnotationPreference(a);
				if (preference == null || !(fStore.getBoolean(preference.getTextPreferenceKey()) || (preference.getHighlightPreferenceKey() != null && fStore.getBoolean(preference.getHighlightPreferenceKey()))))
					continue;
				Position p= model.getPosition(a);
				
				int l= fAnnotationAccess.getLayer(a);
				
				if (l > layer && p != null && p.overlapsWith(hoverRegion.getOffset(), hoverRegion.getLength())) {
					String msg= a.getText();
					if (msg != null && msg.trim().length() > 0) {
						message= msg;
						layer= l;
					}
				}
			}