Javafx 2.0 How-to Application.getParameters() in a Controller.java file

Question

Considering the following sample.

How to access to arguments/parameters of the application in the controller?

Thank you.

---

Answer 1

    public static <T extends Node, P> T load(String resource, final P parameter)
            throws MoisException {
        try {
            logger.debug("resource: {}; parameter: {}", resource, parameter);
            FXMLLoader loader = new FXMLLoader(getResource(resource));
            // pass parameter into Controller,before invoke the initialize()
            loader.setControllerFactory(new Callback<Class<?>, Object>() {
                @Override
                public Object call(Class<?> param) {
                    Object controller = null;
                    try {
                        controller = ReflectUtil.newInstance(param);
                    } catch (InstantiationException e) {
                        throw new MoisException("can't new instance for: " + param.getName(), e);
                    } catch (IllegalAccessException e) {
                        throw new MoisException("can't new instance for: " + param.getName(), e);
                    }
                    if (controller instanceof ParameterAware) {
                        ((ParameterAware<P>) controller).setParameter(parameter);
                    }
                    return controller;
                }
            });
            T node = (T) loader.load();
            // pass parameter to node
            node.setUserData(parameter);
            return node;
        } catch (IOException e) {
            throw new MoisException("can't load the file: " + resource, e);
        }
    }

and the ParameterAware:

public interface ParameterAware<T> {
    void setParameter(T param);
}

Answer 2

1. Most straightforward way -- save them in app:

public class App extends Application {

  public static void main(String[] args) { launch(); }

  public static String parameters;

  @Override
  public void start(Stage primaryStage) throws Exception {

    parameters = getParameters().getNamed().toString();

    Parent root = FXMLLoader.load(getClass().getResource("MyView.fxml"));
    final Scene scene = new javafx.scene.Scene(root);
    primaryStage.setScene(scene);
    primaryStage.show();
  }

}

and read them in controller:

public class MyController implements Initializable {

  @Override
  public void initialize(URL url, ResourceBundle rb) {
     System.out.println(App.parameters);
  }

2. More complex (but better in general) approaches are described in next topics:

• Passing Parameters JavaFX FXML
• Multiple FXML with Controllers, share object