Bug 60117 [Viewers] Need a DeferredTableContentProvider
eclipse-SDK-I20040427-win32.zip 1. Perform a search & display the results with the flat layout 2. Now sort the results by 'Parent Name'... notice the type names do not come first 2. Switch to the hierarchical layout, then back to the flat - now the type names are first
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/JavaSearchResultPage.java
* Precondition here: the viewer must be showing a tree with a LevelContentProvider.
	 * @param order
	 */
	void setGrouping(int grouping) {
		fCurrentGrouping= grouping;
		StructuredViewer viewer= getViewer();
		LevelTreeContentProvider cp= (LevelTreeContentProvider) viewer.getContentProvider();
		cp.setLevel(grouping);
		updateGroupingActions();
		getSettings().put(KEY_GROUPING, fCurrentGrouping);
	}
	
	protected StructuredViewer getViewer() {
		
		return super.getViewer();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.search.ui.text.AbstractTextSearchViewPage#restoreState(org.eclipse.ui.IMemento)
	 */
	public void restoreState(IMemento memento) {
		super.restoreState(memento);
		try {
			fCurrentSortOrder= getSettings().getInt(KEY_SORTING);
		} catch (NumberFormatException e) {
			fCurrentSortOrder=  SortingLabelProvider.SHOW_ELEMENT_CONTAINER;
		}
		try {
			fCurrentGrouping= getSettings().getInt(KEY_GROUPING);
		} catch (NumberFormatException e) {