Bug 123319 [Markers] ClassCastException during marker update
3.2 20050116 It is possible to get the following ClassCastException during marker updates. This is because the refreshes are not IMarkers and should not be processed. !ENTRY org.eclipse.core.jobs 4 2 2006-01-10 16:00:48.468 !MESSAGE An internal error occurred during: "Process resource updates". !STACK 0 java.lang.ClassCastException at org.eclipse.ui.views.markers.internal.MarkerView$MarkerProcessJob.getExistingMarkers(MarkerView.java:206) at org.eclipse.ui.views.markers.internal.MarkerView$MarkerProcessJob.run(MarkerView.java:169) 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
*/
	void refreshMarkerCounts(IProgressMonitor monitor) {
		monitor.subTask(MarkerMessages.MarkerView_refreshing_counts);
		try {
			totalMarkers = MarkerList.compute(getMarkerTypes()).length;
		} catch (CoreException e) {
			IDEWorkbenchPlugin.getDefault().getLog().log(e.getStatus());
			return;
		}
	}
	/**
	 * Returns the marker limit or -1 if unlimited
	 * 
	 * @return int
	 */
	int getMarkerLimit() {
		
		if (IDEWorkbenchPlugin.getDefault().getPreferenceStore().getBoolean(
				getMarkerEnablementPreferenceName())) {
			return IDEWorkbenchPlugin.getDefault().getPreferenceStore().getInt(
					getMarkerLimitPreferenceName());
		}
		return -1;
	}
	/**
	 * Get the name of the marker limit preference.
	 * 
	 * @return String
	 */
	abstract String getMarkerEnablementPreferenceName();