public static String getRecurrence(String rule) {
if (rule != null) {
try {
Recur recur = new Recur(rule);
String frequency = recur.getFrequency();
WeekDayList wdl = recur.getDayList();
Integer interval = recur.getInterval();
if((wdl != null && wdl.size() > 0)) {
// we only support one rule with daylist
return KalendarEvent.WORKDAILY;
} else if(interval != null && interval == 2) {
// we only support one rule with interval
return KalendarEvent.BIWEEKLY;