Reorder items in Apache Wicket's repeating views - wicket

Question

Is it possible to reorder items that have been added to a repeating view (more precisely a ListView) in Apache Wicket?
I tried reordering them in the attached list, like shown in the following code, but this had no effect:
int indexA = itemList.indexOf(itemA);
int indexB = itemList.indexOf(itemB);
itemList.set(indexA, itemB);
itemList.set(indexB, itemA);
As this had no effect I tried resetting the list property of the ListView:
listView.setList(itemList);
Of course I remembered to trigger an according repaint for the web page, but all in all it had no effect.
In some further attempts I tried to add a new item not to the end of the list but to the beginning:
itemList.add(0, newItem);
Instead of just
itemList.add(newItem);
While the latter one works (and always worked fine), the first obviously works for the first item but throws an exception for the second item.
Last cause: Unable to find component with id 'list-component' in [ListItem [Component id = 0]]
Expected: 'list-container:list-items:0:list-component'.
Found with similar names: 'list-container:list-items:1:list-component'
Where list-container is the WebMarkupContainer surrounding the ListView, list-items is the ListView itself and list-component is the id of the item to be added.
So, is it not possible to reorder items after they have been added to a repeating view? Can new items only be added at the end of it? Or am I missing something here, probably a class different than ListView that implements such features?
My main goal is to be able to reorder items, the "add at the beginning"-approach was just a test if it would at least work to remove the items from the view and re-add them at the desired position.

Answer 1

The link that has 'move Up' works like this, you could use this as inspiration :)
public final Link<Void> moveUpLink(final String id, final ListItem<T> item)
{
return new Link<Void>(id)
{
private static final long serialVersionUID = 1L;
/**
* #see org.apache.wicket.markup.html.link.Link#onClick()
*/
#Override
public void onClick()
{
final int index = item.getIndex();
if (index != -1)
{
addStateChange();
// Swap items and invalidate listView
Collections.swap(getList(), index, index - 1);
ListView.this.removeAll();
}
}
#Override
public boolean isEnabled()
{
return item.getIndex() != 0;
}
};
}