// idStr is a integer string 0..3 public Map<String, String> getParticipantIdentifiers(String idStr) { Identifier identifier = Identifier.values()[0]; // default if (idStr.equals("1")) identifier = Identifier.values()[1]; else if (idStr.equals("2")) identifier = Identifier.values()[2]; else if (idStr.equals("3")) identifier = Identifier.values()[3]; return getParticipantIdentifiers(identifier); }