public class Model {
    public static final String FIELD_ID = "id";
    public static final String FIELD_NAME = "name";    

    protected long id = -1;
    protected String name = "Unknown";        

    public Model(final long id, final String name) {
        this.id = id;
        this.name = name;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public long getId() {
        return id;
    }
}

@SuppressWarnings("restriction")
public class ModelSystemDetailPartController implements Initializable {
    private final IObservableValue master = new WritableValue();

    @FXML
    GridPane modelsystemroot;

    @FXML
    TextField identity;

    @FXML
    TextField name;

    @Override
    public void initialize(final URL location, final ResourceBundle resources) {
        final IJFXBeanValueProperty uiTextProperty = JFXBeanProperties.value("text");
        final DataBindingContext ctx = new DataBindingContext();

        final IObservableValue oIdentity = uiTextProperty.observe(identity);
        final IObservableValue oFieldId = BeanProperties.value(Model.FIELD_ID).observeDetail(master);
        final UpdateValueStrategy modelTotarget = new UpdateValueStrategy();
        modelTotarget.setConverter(NumberToStringConverter.fromLong(true));
        ctx.bindValue(oIdentity, oFieldId, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), modelTotarget);

        final IObservableValue oName = uiTextProperty.observe(name);
        final IObservableValue oFieldName = BeanProperties.value(Model.FIELD_NAME).observeDetail(master);
        ctx.bindValue(oName, oFieldName, new UpdateValueStrategy(UpdateValueStrategy.POLICY_NEVER), null);
    }

    @Inject
    public void setModel(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) final Model modelSystem) {
        if (modelSystem != null) {            
				master.setValue(modelSystem);
            }
        } else {
	    // although there is a binding, this does not clear the identity textfield. This textfield is bind to the Model.FIELD_ID.  Is this releated to a binding long (model) to String (textfield in ui) ???
            master.setValue(null);
	    // This code does not seems to be the correct way
            // if (identity != null && name != null) {
            // if (!identity.getText().isEmpty() && !name.getText().isEmpty()) {
            // identity.clear();
            // name.clear();
            // }
            // }
        }
    }
}