How can I right-align a cell in a Wicket table column?

I'd like to have a PropertyColumn of a DataTable right-aligne开发者_开发百科d. But if I try to add a new SimpleAttributeModifier("align", "right") to the cell item, it is added to a span within the td, rather than the td itself.

public class AssetSizeColumn<T> extends PropertyColumn<T> {
...
@SuppressWarnings("unchecked")
public void populateItem(Item<ICellPopulator<T>> item, String componentId, IModel<T> rowModel) {
    IModel<Long> model = (IModel<Long>) createLabelModel(rowModel);
    Component label = new Label(componentId, model.getValue().toString());
    label.add(new SimpleAttributeModifier("align", "right"));
    item.add(label);
}

Can I get at the td to set the alignment?

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The trick is that the td is the parent of the item as soon as it is added to the ICellPopulator, so that we can add a modifier to it straight away.

public void populateItem(Item<ICellPopulator<T>> item, String componentId, IModel<T> rowModel) {
    IModel<Long> model = (IModel<Long>) createLabelModel(rowModel);
    Component label = new Label(componentId, model.getObject().toString());
    item.add(label);
    label.getParent().add(new SimpleAttributeModifier("align", "right"));
}