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/ProblemView.java
private final static String[] ROOT_TYPES = { IMarker.PROBLEM };
	private final static String TAG_DIALOG_SECTION = "org.eclipse.ui.views.problem"; 
	private static final String TAG_SYSTEM_FILTER_ENTRY = "systemFilter";
	private ActionResolveMarker resolveMarkerAction;
	private IActivityManagerListener activityManagerListener;
	private IField severity = new FieldSeverity();
	private IField folder = new FieldFolder();
	private IField resource = new FieldResource();
	private IField message = new FieldMessage();
	private IField lineNumber = new FieldLineNumber();
	private IField creationTime = new FieldCreationTime();
	
	
	private static IField id = new FieldId();
	private class GroupingAction extends Action {
		IField groupingField;
		ProblemView problemView;
		/**
		 * Create a new instance of the receiver.
		 * 
		 * @param label
		 * @param field
		 * @param view
		 */
		public GroupingAction(String label, IField field, ProblemView view) {
			super(label, IAction.AS_RADIO_BUTTON);
			groupingField = field;
			problemView = view;