public ActionForward prepareCreateComplexSummary(ActionMapping mapping, ActionForm form, HttpServletRequest request,
HttpServletResponse response) {
Professorship loggedProfessorship = (Professorship) request.getAttribute("loggedTeacherProfessorship");
ExecutionCourse executionCourse = (ExecutionCourse) request.getAttribute("executionCourse");
DynaActionForm dynaActionForm = (DynaActionForm) form;
String[] selectedLessons = request.getParameterValues("selectedLessonAndDate");
if (selectedLessons == null || selectedLessons.length == 0) {
return goToInsertComplexSummaryAgain(request, mapping, response, form);