/**
* Retrieve actual data which was saved - called by Filter. Chose to keep all logic here for
* saving and retrieving data TODO find away of purging stuff *when* it is reasonable to do so
*
* @param request
* @param id
* @return Map containing details of previous pages visited
* @throws IllegalStateException
*/
public static Map[] getCallerPageData(HttpServletRequest request, String id) {
Map callerPageHistory = (Map) request.getSession().getAttribute("callerPageHistory");
if (callerPageHistory == null || !callerPageHistory.containsKey(id)) {
CallerPageException e = new CallerPageException("No caller page data for ID=" + id);
throw (CallerPageException) NavExceptionHelper.fillInStacktrace(e);
}
return (Map[]) callerPageHistory.get(id);
}
