public static Period decodeMetadata(Metadata meta, ICalTimeZone tz, TimeZoneMap tzmap) throws ServiceException { String start = meta.get(FN_START); ParsedDateTime startTime; try { startTime = ParsedDateTime.parse(start, tzmap, tz, tzmap.getLocalTimeZone()); } catch (ParseException e) { throw ServiceException.INVALID_REQUEST( "Invalid PERIOD start time in metadata: " + meta.toString(), e); } String end = meta.get(FN_END, null); if (end != null) { ParsedDateTime endTime; try { endTime = ParsedDateTime.parse(end, tzmap, tz, tzmap.getLocalTimeZone()); } catch (ParseException e) { throw ServiceException.INVALID_REQUEST( "Invalid PERIOD end time in metadata: " + meta.toString(), e); } return new Period(startTime, endTime); } else { String durStr = meta.get(FN_DURATION, null); if (durStr == null) throw ServiceException.INVALID_REQUEST( "PERIOD in metadata missing both end time and duration: " + meta.toString(), null); ParsedDuration duration = ParsedDuration.parse(durStr); return new Period(startTime, duration); } }