private void setRoles(MUCRoom room, Map<String, Object> roomSpec) throws Exception { List<JID> roles = new ArrayList<JID>(); Collection<JID> owners = new ArrayList<JID>(); Collection<JID> existingOwners = new ArrayList<JID>(); List<String> specOwners = (List) roomSpec.get("owners"); List<String> specAdmins = (List) roomSpec.get("admins"); List<String> specMembers = (List) roomSpec.get("members"); List<String> specOutcasts = (List) roomSpec.get("outcasts"); List<JID> mucRoomEntityOwners = convertStringsToJIDs(specOwners); owners.addAll(room.getOwners()); // Find same owners for (JID jid : owners) { if (mucRoomEntityOwners.contains(jid)) { existingOwners.add(jid); } } // Don't delete the same owners owners.removeAll(existingOwners); room.addOwners(convertStringsToJIDs(specOwners), room.getRole()); // Collect all roles to reset roles.addAll(owners); roles.addAll(room.getAdmins()); roles.addAll(room.getMembers()); roles.addAll(room.getOutcasts()); for (JID jid : roles) { room.addNone(jid, room.getRole()); } room.addOwners(convertStringsToJIDs(specOwners), room.getRole()); if (specAdmins != null) { room.addAdmins(convertStringsToJIDs(specAdmins), room.getRole()); } if (specMembers != null) { for (String memberJid : specMembers) { room.addMember(new JID(memberJid), null, room.getRole()); } } if (specOutcasts != null) { for (String outcastJid : specOutcasts) { room.addOutcast(new JID(outcastJid), null, room.getRole()); } } }