As far as I understand, when creating a project using the FXML JavaFX Maven Archetype, the project is initially designed with the MVC pattern. However, I wanted to convert it to the MVP architecture (don’t ask why). Since I have almost no practical experience in this, only a bit of theory, I would like to know how wrong I am in this approach and what mistakes I am making. Below is a description of this attempt.

P.S. If you simply move the model into the controller, essentially it will be the same without extra files?”

Screenshot of the program structure:

Code:

public interface Contract {

public interface PrimaryView {

    void showData(String data);

    String getCurrentData();

    void switchToSecondary() throws IOException;  

    void showList();

}
 
public interface SecondaryView {
    
    void showData(String data);
    
    void switchToPrimary() throws IOException;
   
}
}

In FXML JavaFX, everything operates through the controller, but here the controller duplicates all calls in the presenter.

public class PrimaryController implements Initializable, Contract.PrimaryView {
    
    @FXML
    private Label dataLabel;
    
    @FXML
    private Button primaryButton;
    
    private PrimaryPresenter presenter;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        presenter = new PrimaryPresenter(this);
        presenter.init();
        dataLabel.textProperty().bind(presenter.getUserModel().nameProperty());  
    }

    @Override
    public void showData(String data) {

    }

    @Override
    public void switchToSecondary() {
        presenter.switchToSecondary();
    }
    

    @Override
    public String getCurrentData() {
        return dataLabel.getText();
    }

    
    @FXML
    @Override
    public void showList() {
        presenter.showList();
    }
    
}

Presenter

public class PrimaryPresenter {
    
    private PrimaryView view;
    private UserModel model; 

    public PrimaryPresenter(PrimaryView view) {
        this.view = view;
        this.model = new UserModel(); 
    }

    public void init() {

        view.showData("PrimaryPresenter");        
    }

    public UserModel getUserModel(){
        return model;
    }
        
    public void showList(){
        
        throw new UnsupportedOperationException("Not supported yet."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
  
    }

    public void switchToSecondary() {
    
        try {
            
            App.setRoot("secondary");
            
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

   
}

Model

public class UserModel {
    private StringProperty name;
    private StringProperty email;

    public UserModel() {
        this.name = new SimpleStringProperty();
        this.email = new SimpleStringProperty();
    }

    public String getName() {
        return name.get();
    }

    public void setName(String name) {
        this.name.set(name);
    }

    public StringProperty nameProperty() {
        return name;
    }

    public String getEmail() {
        return email.get();
    }

    public void setEmail(String email) {
        this.email.set(email);
    }

    public StringProperty emailProperty() {
        return email;
    }
}