Bug 133059 [Markers] CCE when switching Problems view grouping
I20060322-1335 I switched Problems view grouping from Java Problem Type to Type while a background build was going on. !ENTRY org.eclipse.core.jobs 4 2 2006-03-23 20:36:24.465 !MESSAGE An internal error occurred during: "Process resource updates". !STACK 0 java.lang.ClassCastException: org.eclipse.ui.views.markers.internal.MarkerGroupingEntry at org.eclipse.ui.views.markers.internal.FieldCategory.getValue(FieldCategory.java:66) at org.eclipse.ui.views.markers.internal.FieldCategory.compare(FieldCategory.java:88) at org.eclipse.ui.views.markers.internal.CategorySorter.compare(CategorySorter.java:59) at org.eclipse.ui.views.markers.internal.CategorySorter.compare(CategorySorter.java:73) at org.eclipse.jface.viewers.ViewerComparator$1.compare(ViewerComparator.java:184) at java.util.Arrays.mergeSort(Arrays.java:1284) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1295) at java.util.Arrays.mergeSort(Arrays.java:1295) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.mergeSort(Arrays.java:1296) at java.util.Arrays.sort(Arrays.java:1223) at org.eclipse.jface.viewers.ViewerComparator.sort(ViewerComparator.java:182) at org.eclipse.ui.views.markers.internal.MarkerAdapter.buildAllMarkers(MarkerAdapter.java:240) at org.eclipse.ui.views.markers.internal.MarkerView.updateForContentsRefresh(MarkerView.java:412) at org.eclipse.ui.views.markers.internal.MarkerView$MarkerProcessJob.run(MarkerView.java:146) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:58)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* 
	 * @see org.eclipse.ui.IViewPart#init(org.eclipse.ui.IViewSite,
	 *      org.eclipse.ui.IMemento)
	 */
	public void init(IViewSite site, IMemento memento) throws PartInitException {
		super.init(site, memento);
		IWorkbenchSiteProgressService progressService = getProgressService();
		if (progressService != null) {
			getProgressService().showBusyForFamily(
					ResourcesPlugin.FAMILY_MANUAL_BUILD);
			getProgressService().showBusyForFamily(
					ResourcesPlugin.FAMILY_AUTO_BUILD);
		}
		loadFiltersPreferences();
		ResourcesPlugin.getWorkspace().addResourceChangeListener(
				markerUpdateListener,
				IResourceChangeEvent.POST_CHANGE
						| IResourceChangeEvent.PRE_BUILD
						| IResourceChangeEvent.POST_BUILD);
	}
	/**
	 * Load the filters preference.
	 */
	private void loadFiltersPreferences() {
		String preference = IDEWorkbenchPlugin.getDefault()
				.getPreferenceStore().getString(getFiltersPreferenceName());
		if (preference.equals(IPreferenceStore.STRING_DEFAULT_DEFAULT)) {
			createDefaultFilter();
			return;
		}