/**
  * Set the specified URI as the selected node in the tree (if it exists)
  *
  * @param uri
  */
 public void setSelectedValue(String uri) {
   OntDocumentManagerTreeModel model = (OntDocumentManagerTreeModel) this.getModel();
   TreePath treePath = model.getPath(uri);
   if (treePath != null) {
     this.setSelectionPath(treePath);
   } else {
     this.clearSelection();
   }
 }