Bug 106884 Need an index based setSelection for ILazyContentProviders
20050812 It is currently very ineffecient to set a non visible selection in the TableViewer as we cannot look up the items without creating them all. It is possible to use getTable().setSelection() but we should 1) Have an API where you can reveal 2) Implement the selSelection where we give the performance warning and just call super
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableViewer.java
return null;
	}
	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#doUpdateItem(org.eclipse.swt.widgets.Widget, java.lang.Object, boolean)
	 */
	protected void doUpdateItem(Widget widget, Object element, boolean fullMap) {
		if (widget instanceof TableItem) {
			final TableItem item = (TableItem) widget;
			
			if (fullMap) {
				associate(element, item);
			} else {
				item.setData(element);
				mapElement(element, item);
			}
			IBaseLabelProvider prov = getLabelProvider();
			ITableLabelProvider tprov = null;		
			ILabelProvider lprov = null;
			IViewerLabelProvider vprov = null;
			
			if(prov instanceof ILabelProvider)
				lprov = (ILabelProvider) prov;
			
			if (prov instanceof IViewerLabelProvider) {
				vprov = (IViewerLabelProvider) prov;
			} 
			if (prov instanceof ITableLabelProvider) {
				tprov = (ITableLabelProvider) prov;
			}