private String getSyncWithSortedChanges(AccessToken at, Request request, XmlResponder responder) throws ServerFault, NotAllowedException { SyncRange syncRange = null; Date after = DateHelper.asDate(request.getParameter("syncRangeAfter"), null); Date before = DateHelper.asDate(request.getParameter("syncRangeBefore"), null); if (after != null) { syncRange = new SyncRange(before, after); } EventChanges ret = binding.getSyncWithSortedChanges( at, getCalendar(request), DateHelper.asDate(request.getParameter("lastSync")), syncRange); return responder.sendCalendarChanges(ret); }