Wicket: Can I create the markup before initializing the java component?

Question

html file which looks like this:

<wicket:panel>
    <form wicket:id="adminUIForm">
        <table wicket:id="datatable" class="datatable"></table>
        <div wicket:id="institutTablePanel"></div>
    </form>
</wicket:panel>

But in my Java Code I only want to instantiate the component institutTablePanel, when a row in the datatable is clicked, because the constructor looks like this:

target.add(new InstitutTablePanel("institutLabelPabel", selectedContact));

And selectedContact cannot be empty. Is there a possibility of doing this without getting an error that it cannot find the component in my JavaCode?

Edit: This might be helpful

@Override
protected Item<Kontakt> newRowItem(final String id, final int index,
    final IModel<Kontakt> model) {
        Item<Kontakt> rowItem = new Item<Kontakt>(id, index, model);
        rowItem.add(new AjaxEventBehavior("onclick") {

        private static final long serialVersionUID = 1L;

        @Override
        protected void onEvent(AjaxRequestTarget target) {
             selectedKontakt = model.getObject();
             target.add(new InstitutTablePanel("institutTablePanel", selectedKontakt));
        }
    });
    return rowItem;
}

Answer 1

Create an empty WebMarkupContainer that is a blank div and add it to your page/parent component. Next, onClick, use addOrReplace and replace the the WebMarkupContainer with the InstitutTablePanel. Both the WebMarkupContainer and the InstitutTablePanel should have the same wicket:id