Problem: CollaborationBinder and MultiSelectComboBox/CheckboxGroup in a Dialog

Flow
1

Hello, I have a problem (Version 24.6.4) using a MultiSelectComboBox (as well as a CheckboxGroup) with a CollaborationBinder in a dialog. After opening the dialog, a setValue with an empty set is called again on the MultiSelectComboBox.

I have created a minimal example with a very simple bean (A), which has an attribute of type Set<Double>. In the dialog, I have also added a TextField to show that this field does not have any issues. Additionally, I have created a few buttons that clearly demonstrate the problem.

After opening the dialog, you can use “Print A” to display the current state of the topic. At this point, the object contains exactly one Double in the set. The MultiSelectComboBox correctly displays this as well. However, if you click on “Print Value Select”, you will see that the value of the MultiSelectComboBox is empty at that moment. The values in the TextField remain correct.

If you then trigger a “Write bean”, the set in the object is incorrectly cleared. This issue does not occur outside of a dialog. I couldn’t find any restrictions regarding my approach in the documentation.

Thanks in advance!

@Getter
@Setter
@ToString
public class A {
	private String name;
	private Set<Double> bs = new HashSet();

	public A(String name) {
		this.name = name;
	}

	public void addB(Double b) {
		this.getBs()
				.add(b);
	}
}

// Create some Objects
		A a = new A("A1");
		Double d1 = Double.valueOf(1);
		Double d2 = Double.valueOf(2);
		Double d3 = Double.valueOf(3);
		a.addB(d1);

		List<Double> allBs = new ArrayList<Double>();
		allBs.add(d1);
		allBs.add(d2);
		allBs.add(d3);

		// Init MultiSelectComboBox
		MultiSelectComboBox<Double> multiSelectComboBox = new MultiSelectComboBox<>();
		multiSelectComboBox.setLabel("Bs");
		multiSelectComboBox.setItems(allBs);

		// Init TextField
		TextField textField = new TextField("Name");

		// Init CollabortionBinder
		CollaborationBinder<A> binder = new CollaborationBinder<A>(A.class, GlobalManagement.getUserInfo());
		binder.forField(multiSelectComboBox, Set.class, Double.class)
				.bind("bs");
		binder.forField(textField)
				.bind("name");

		// Create Dialog
		Dialog myDialog = new Dialog();
		myDialog.add(multiSelectComboBox);
		myDialog.add(textField);

		// Add Button to print Object A
		Button printAButton = new Button("Print A");
		printAButton.addSingleClickListener(click -> {
			System.out.println(a);
		});
		myDialog.add(printAButton);

		// Add Button to print current values from the MultiSelectComboBox
		Button printValueSelect = new Button("Print Value Select");
		printValueSelect.addSingleClickListener(click -> {
			System.out.println(multiSelectComboBox.getValue());
		});
		myDialog.add(printValueSelect);

		// Add Button to print current value of the TextField
		Button printTextField = new Button("Print TextField");
		printTextField.addSingleClickListener(click -> {
			System.out.println(textField.getValue());
		});
		myDialog.add(printTextField);

		// Add Button to write bean
		Button write = new Button("Write bean");
		write.addSingleClickListener(click -> {
			try {
				binder.writeBean(a);
				System.out.println("Bean written");
			} catch (ValidationException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		});
		myDialog.add(write);

		// Add Button to set topic manually again
		Button setTopicButton = new Button("Set topic");
		setTopicButton.addSingleClickListener(click -> {
			binder.setTopic("ID123", () -> a);
		});
		myDialog.add(setTopicButton);

		// Set topic
		binder.setTopic("ID123", () -> a);

		// Open dialog
		myDialog.open();