CODEWITHSUNDEEP
javatableviewjavafx-8
Hassam Abdelillah
Hassam Abdelillah

Reputation: 2294

Using TableView with generic object properties

I have a dozen of parameters i want to display throught a javafx application. I just pick TableView to render these parameters.

Here is how theses parameters looks like :

public abstract class AbstractParameter<T> {

    private String myKey;
    private ObjectProperty<T> myValue = new SimpleObjectProperty<T>()
    private boolean constantValue;


    public AbstractParameter<T>(){
             //...
    }

    ObjectProperty<T> property(){ 
         return property;
    }

}

Note here that a have multiple subclasses such as StringParameter, IntegerParameter, LongParameter, BooleanParameter, ect...

I'm using that approach because some of the params are defined/updated during runtime

Now here is my ParametersUIController

public Class ParametersUiController {

@FXML
private TableView<AbstractParameter<?>> paramsTable;
@FXML
private TableColumn<AbstractParameter<?>, String> paramKeyCol;
@FXML
private TableColumn<AbstractParameter<?>, String> paramValueCol;
@FXML
private TableColumn<AbstractParameter<?>, Boolean> paramConstantValueCol;


private ObservableList<AbstractParameter<?>> paramsData = FXCollections.observableArrayList();

/**
* Just add some sample data in the constructor.
*/
public PersonTableController() {
  /* getting a list of params for a service 
     the params are defined in list
  */
  for(AbstractParameter<?> param : rawData)
      paramsData.add(param);
  }

/* I cast the value type to string always */

pValueCol.setCellValueFactory(new Callback<CellDataFeatures<AbstractParameter<?>, String>, ObservableValue<String>>() {
         public ObservableValue<String> call(CellDataFeatures<AbstractParameter<?>, String> param) {
             return new SimpleStringProperty(param.getValue().property().get().toString());
         }
      });

}

I'm wordering is there any other proper way to display generic types T without casting a defined paramter at runtime with String every time ?

Upvotes: 1

Views: 186

Answers (1)

leobelizquierdo
leobelizquierdo

Reputation: 1668

You can use this:

pValueCol.setCellValueFactory(new PropertyValueFactory("generic"));

and create a method like this in your model:

ObjectProperty<T> genericProperty(){ 
         return property;
}

The statement new PropertyValueFactory("generic") look for a method in your model named genericProperty. It can return the generic value wrapped in an ObjectProperty<T>.

Upvotes: 1

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