private void loadCourseOfferings(Long sessionId) {
   for (Iterator it = CourseOffering.findAll(sessionId).iterator(); it.hasNext(); ) {
     CourseOffering offer = (CourseOffering) it.next();
     if (offer.getPermId() != null) {
       courseOfferings.put(
           offer.getCourseNbr() + offer.getSubjectArea().getUniqueId().toString(),
           offer.getPermId());
     }
     externalIdSubjectArea.put(offer.getExternalUniqueId(), offer.getSubjectArea());
     externalIdCourseNumber.put(offer.getExternalUniqueId(), offer.getCourseNbr());
     externalIdCoursePermId.put(offer.getExternalUniqueId(), offer.getPermId());
   }
 }