Bug 157495 [Viewers] public subclasses of ViewerSorter should be changed to ViewerComparator
The following 3 classes in the ui should be changed to be subclasses of ViewerComparator: ResourceSorter WorkbenchViewerSorter FileViewerSorter This will involve deprecating old classes and methods, and adding new classes and methods for each of these classes and to classes that reference these sorter classes in their API.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
* Settings constant for section name (value <code>ResourceNavigator</code>).
	 */
    private static final String STORE_SECTION = "ResourceNavigator"; 
    /** 
     * Settings constant for sort order (value <code>ResourceViewer.STORE_SORT_TYPE</code>).
     */
    private static final String STORE_SORT_TYPE = "ResourceViewer.STORE_SORT_TYPE"; 
    /** 
     * Settings constant for working set (value <code>ResourceWorkingSetFilter.STORE_WORKING_SET</code>).
     */
    private static final String STORE_WORKING_SET = "ResourceWorkingSetFilter.STORE_WORKING_SET"; 
    /**
     * @deprecated No longer used but preserved to avoid an api change.
     */
    public static final String NAVIGATOR_VIEW_HELP_ID = INavigatorHelpContextIds.RESOURCE_VIEW;
    /**
     * True iff we've already scheduled an asynchronous call to linkToEditor
     */
    private boolean linkScheduled = false;
    
    
    private static final String TAG_SORTER = "sorter"; 
    private static final String TAG_FILTERS = "filters"; 
    private static final String TAG_FILTER = "filter"; 
    private static final String TAG_SELECTION = "selection"; 
    private static final String TAG_EXPANDED = "expanded"; 
    private static final String TAG_ELEMENT = "element"; 
    private static final String TAG_IS_ENABLED = "isEnabled"; 
    private static final String TAG_PATH = "path"; 
    private static final String TAG_CURRENT_FRAME = "currentFrame";