TreeTableView data model - java-8

Question

I am new to Java 8 world(with lambdas, functions etc,) and building a JavaFX 8 application, i am struggling to build the data model(TreeItem) for TreeTableView. The data is fetched from database as ObservableList<Certificate>. A Certificate object with ca=true could have children which could be tracked by issuerName field. My aim is to build a TreeTableView with various columns, where Certificates are presented as
Root(a dummy node)
|
|--Certificate1 (could be ca=false with no issuer match to any ca OR ca=true with no child)
|--Certificate2
|--Certificate3 (ca=true)
|--Certifciate4 (issuer name machted with Certificate3)
|--Certificate5 (issuer name machted with Certificate3)
|--Certificate6
|--Certificate7 (ca=true)
|--Certifciate8 (issuer name machted with Certificate7)
|--Certificate9 (issuer name machted with Certificate7)
Class Certificate looks like
public class Certificate implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private String name;
private boolean ca;
private String issuerName;
...
In next step want some add/remove/edit functionality on this view.
Can anyone guide me how can i achieve this???

Answer 1

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TreeTableView;
import javafx.stage.Stage;
public class TreeTableSampleApp extends Application {
#Override public void start(Stage primaryStage) {
primaryStage.setTitle("TreeTable View Sample");
primaryStage.setScene(new Scene(new TreeTableSample()));
primaryStage.sizeToScene();
primaryStage.show();
TreeTableView<?> treeTableView = (TreeTableView<?>) primaryStage.getScene().getRoot().lookup(".tree-table-view");
treeTableView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
}
public static void main(String[] args) {
Application.launch(args);
}
}
import java.util.Arrays;
import java.util.List;
import ensemble.Sample;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.beans.property.SimpleStringProperty;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeTableColumn;
import javafx.scene.control.TreeTableView;
import javafx.scene.layout.Pane;
public class TreeTableSample extends Pane {
List<Employee> employees = Arrays.<Employee> asList(new Employee("Ethan Williams", "ethan.williams#example.com"),
new Employee("Emma Jones", "emma.jones#example.com"), new Employee("Michael Brown", "michael.brown#example.com"),
new Employee("Anna Black", "anna.black#example.com"), new Employee("Rodger York", "roger.york#example.com"),
new Employee("Susan Collins", "susan.collins#example.com"));
final TreeItem<Employee> root = new TreeItem<>(new Employee("Sales Department", ""));
public TreeTableSample() {
root.setExpanded(true);
employees.stream().forEach((employee) -> {
root.getChildren().add(new TreeItem<>(employee));
});
TreeTableColumn<Employee, String> empColumn = new TreeTableColumn<>("Employee");
empColumn.setPrefWidth(150);
empColumn.setCellValueFactory((TreeTableColumn.CellDataFeatures<Employee, String> param) -> new ReadOnlyStringWrapper(
param.getValue().getValue().getName()));
TreeTableColumn<Employee, String> emailColumn = new TreeTableColumn<>("Email");
emailColumn.setPrefWidth(190);
emailColumn.setCellValueFactory((TreeTableColumn.CellDataFeatures<Employee, String> param) -> new ReadOnlyStringWrapper(
param.getValue().getValue().getEmail()));
TreeTableView<Employee> treeTableView = new TreeTableView<>(root);
treeTableView.getColumns().setAll(empColumn, emailColumn);
getChildren().add(treeTableView);
}
public class Employee {
private SimpleStringProperty name;
private SimpleStringProperty email;
public SimpleStringProperty nameProperty() {
if (name == null) {
name = new SimpleStringProperty(this, "name");
}
return name;
}
public SimpleStringProperty emailProperty() {
if (email == null) {
email = new SimpleStringProperty(this, "email");
}
return email;
}
private Employee(String name, String email) {
this.name = new SimpleStringProperty(name);
this.email = new SimpleStringProperty(email);
}
public String getName() {
return name.get();
}
public void setName(String fName) {
name.set(fName);
}
public String getEmail() {
return email.get();
}
public void setEmail(String fName) {
email.set(fName);
}
}
}