Issue with ComboBox/Select in 6.3.0

Vaadin 6 / 7 / 8 Framework UI
1

Hi,
I am having a strange error with 6.3.0.

I have a simple form along the lines of:

form.getLayout().setMargin(true);
// Add some components
form.setImmediate(true);

    Select select = new Select("Some caption");
    select.setInvalidAllowed(false);
    select.setNullSelectionAllowed(false);
    select.addItem("GBP");
    select.addItem("EUR");
    select.addItem("USD");
    
    form.addField("test",select);

When I select an item I get this error on the server:
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String;
at com.vaadin.ui.Select.changeVariables(Select.java:373)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1087)

it looks like the variable that is coming back from the server and mapped in the VariableRecord in AbstractCommunicationManager is similar to: select/PIDXX/a

so the select is mapping ‘a’ to an Object rather than a String
when converting the selection. I am expecting that the select mapped type should be a String or a String type but it always seems to be an Object
.

I have also tried using both IndexedContainer along the lines of:

IndexedContainer container = new IndexedContainer();
container.addItem(“GBP”);
container.addItem(“EUR”);
container.addItem(“USD”);
ComboBox combo = new ComboBox(“Currency”, container);

but I still get the same issue.

I am probably doing something stupid - but any help would be appreciated?

2

The following works for me without problems, with 6.3.0:

Form form = new Form();
form.getLayout().setMargin(true);

// Add some components
form.setImmediate(true);

Select select = new Select("Some caption");
select.setInvalidAllowed(false);
select.setNullSelectionAllowed(false);
select.addItem("GBP");
select.addItem("EUR");
select.addItem("USD");

form.addField("test",select);

You didn’t mention if your Form is bound to some data source?

3

Hi,
It turned out to be to do with the RefresherApplicationWidgetset being used from the incubator as the widgetset in the web.xml. For some reason it is causing the property to be returned as an array type. Further investigation is required.

4

For those that may run into a similar problem. The issue turned out to be the pre-compiled js from the RefresherComponent.

Recompiling against the 6.3.0 dependencies cleared up the problem.