know if checkbox is checked in a table

Vaadin 6 / 7 / 8 Framework UI
1

i have a table loaded with IndexedContainer that has a property with a checkbox.

I’m trying know what items are checked as this :


		Collection <Integer> ids=authorstable.getItemIds();
		Iterator it=ids.iterator();
		while (it.hasNext()){
			CheckBox checkbox=(CheckBox) authorstable.getItem(it.next()).getItemProperty("checkbox");
			if (checkbox.booleanValue()){
			Author author=new Author((Integer)it.next(),null,null);
			publication.addAuthor(author);
			}
		}

But shows and exception
com.vaadin.data.util.IndexedContainer$IndexedContainerProperty cannot be cast to com.vaadin.ui.CheckBox

How can i know which item is checked?

Thanks!

2

Try:

CheckBox checkbox=(CheckBox) (authorstable.getItem(it.next()).getItemProperty("checkbox")).getValue();