CODEWITHSUNDEEP
javajavafxdata-bindingdatepicker
Rafael
Rafael

Reputation: 761

How to bind ObjectProperty<LocalDate> to StringProperty in JavaFX?

I'm trying to bind between two different properties. How can i bind ObjectProperty<LocalDate> to StringProperty?

Task Class

 public class Task {

    StringProperty time = new SimpleStringProperty();
    ObjectProperty<String> testCase = new SimpleObjectProperty<>();
    StringProperty date = new SimpleStringProperty();

    public Task(String date, String time, String testCase) {
        this.date.set(date);
        this.time.set(time);
        this.testCase.set(testCase);
    }

    public String getdate() {
        return date.get();
    }

    public void setDate(String date) {
        this.date.set(date);
    }

    public StringProperty dateProperty() {
        return date;
    }
    }

Controller Class

public class Controller implements Initializable {

@FXML
private DatePicker datePicker;

private Task currentTask = new Task();

@Override
public void initialize(URL location, ResourceBundle resources) {
   datePicker.valueProperty().bindBidirectional(currentTask.dateProperty());
      }
}

Upvotes: 0

Views: 3085

Answers (1)

James_D
James_D

Reputation: 209418

It seems like it would make more sense to make Task.date an ObjectProperty<LocalDate>, if it is supposed to represent a date. Then you can just bind them bidirectionally in the usual way:

public class Task {

    private ObjectProperty<LocalDate> date = new SimpleObjectProperty<>();

    // ...

    public ObjectProperty<LocalDate> dateProperty() {
        return date ;
    }

    public final LocalDate getDate() {
        return dateProperty().get();
    }

    public final void setDate(LocalDate date) {
        dateProperty().set(date);
    }
}

and then of course

datePicker.valueProperty().bindBidirectional(currentTask.dateProperty());

works exactly as needed.

Note that, since in the comments you say you are using a StringProperty as you are marshaling the data with an XMLEncoder, it is perfectly possible to use this approach in that context. See LocalDate serialization error

If you really want this to be a StringProperty (and I should emphasize, it really doesn't make sense to do it this way), you can use a StringConverter:

DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_DATE ;

StringConverter<LocalDate> converter = new StringConverter<LocalDate>() {
    @Override
    public LocalDate fromString(String string) {
        return string == null || string.isEmpty() ? null : LocalDate.parse(string, formattter);
    }
    @Override
    public String toString(LocalDate date) {
        return date == null ? null : formatter.format(date);
    }
};

And finally:

currentTask.dateProperty().bindBidirectional(datePicker.valueProperty(), converter);

Upvotes: 2

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