Bug 124138 NPE in FieldCategory
20060116 Not sure how I got this but I have no categories enabled java.lang.NullPointerException at org.eclipse.ui.views.markers.internal.FieldCategory.compare(FieldCategory.java:87) at org.eclipse.ui.views.markers.internal.TableSorter.compare(TableSorter.java:223) at org.eclipse.ui.views.markers.internal.TableSorter.compare(TableSorter.java:225) at org.eclipse.ui.views.markers.internal.CategorySorter.compare(CategorySorter.java:63) at org.eclipse.ui.views.markers.internal.CategorySorter.compare(CategorySorter.java:96) at org.eclipse.ui.views.markers.internal.SortUtil.partitionHelper(SortUtil.java:114) at org.eclipse.ui.views.markers.internal.SortUtil.getFirst(SortUtil.java:74) at org.eclipse.ui.views.markers.internal.SortUtil.getFirst(SortUtil.java:43) at org.eclipse.ui.views.markers.internal.MarkerAdapter.buildAllMarkers(MarkerAdapter.java:215) at org.eclipse.ui.views.markers.internal.MarkerView.updateForContentsRefresh(MarkerView.java:515) at org.eclipse.ui.views.markers.internal.MarkerView$MarkerProcessJob.run(MarkerView.java:172) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:58)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/ProblemView.java
* information is then massaged into a string which may be displayed by the
	 * caller.
	 * 
	 * @param selection
	 *            a valid selection or <code>null</code>
	 * @return a message ready for display
	 */
	protected String updateSummarySelected(IStructuredSelection selection) {
		Collection selectionList;
		selectionList = new ArrayList();
		Iterator selectionIterator = selection.iterator();
		while (selectionIterator.hasNext()) {
			MarkerNode next = (MarkerNode) selectionIterator.next();
			if (next.isConcrete())
				selectionList.add(next);
		}
		return getSummary(new MarkerList(selectionList),
				"problem.statusSummarySelected"); 
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.views.markers.internal.MarkerView#getMarkerTypes()
	 */
	protected String[] getMarkerTypes() {
		return new String[] { IMarker.PROBLEM };
	}
	protected String getStaticContextId() {
		
		return PlatformUI.PLUGIN_ID + ".problem_view_context";