/**
* Gets the header part of the Panel/Border. Returns null if it doesn't have a header tag.
*
* @param container
* @param id
* @param markup
* @return the header part for this panel/border or null if it doesn't have a wicket:head tag.
*/
private HeaderPartContainer getHeaderPart(
final WebMarkupContainer container, final String id, final IMarkupFragment markup) {
// Create a HtmlHeaderContainer for the header tag found
final MarkupElement element = markup.get(0);
if (element instanceof WicketTag) {
final WicketTag wTag = (WicketTag) element;
if ((wTag.isHeadTag() == true) && (wTag.getNamespace() != null)) {
// Create the header container and associate the markup with it
return new HeaderPartContainer(id, container, markup);
}
}
throw new WicketRuntimeException(
"Programming error: expected a WicketTag: " + markup.toString());
}
