IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(); if (page != null) { IViewPart view = page.findView(navigatorViewId); if (view != null && view instanceof CommonNavigator) { CommonNavigator cn = (CommonNavigator) view; cn.getCommonViewer().setSelection(new StructuredSelection(objToSelect)); } }