更新动态创建的javafx表

从TabPane在选项卡中创建表

private Map<CategoryActive, ObservableList> mapData = new HashMap<>();
List<CategoryActive> categories = categoryActiveModel.getAll(); //load category from DB collection
for (CategoryActive category : categories) {
            Tab tab = new Tab();
            tabPane.getTabs().add(tab);

            TableView<AbstractActive> tableView = new TableView<AbstractActive>();
            TableColumn<AbstractActive, String> clmnTitle = new TableColumn<>();
            clmnTitle.setCellValueFactory(new PropertyValueFactory<>("title"));

            tab.setContent(tableView);

            ObservableList<AbstractActive> data = FXCollections.observableArrayList();
            data.addAll(category.getAbstractActives()); //load items collection from DB

            tableView.setItems(data);
            mapData.put(category, data); // save for update
        }

尝试更新

public void refresh() {
        System.out.println("refresh");
        for (Map.Entry<CategoryActive, ObservableList> entry : mapData.entrySet()) {
            entry.getValue().clear();
            entry.getValue().addAll(entry.getKey().getAbstractActives());
        }
    }

更新不会发生。地图存储副本，而不是链接？如何解决这个问题？