@StringSetter(EVENTS_FILE_FORMAT) private void setEventFileFormats(final String value) { String[] parts = StringUtils.explode(value, ','); Set<EventsFileFormat> formats = EnumSet.noneOf(EventsFileFormat.class); for (String part : parts) { String trimmed = part.trim(); if (trimmed.length() > 0) { formats.add(EventsFileFormat.valueOf(trimmed)); } } this.eventsFileFormats = formats; }