public List<GeneralMessage> getUnreadMessages(String userId, String tagId, UserTags tags) { Query<UnreaddenMessage> q = ds.createQuery(UnreaddenMessage.class).field("userId").equal(userId.toString()); String order = tags.getOrder(); if (!tagId.equals(UserTags.ALL_TAGS)) { SocioTag tag = tags.getTag(tagId); order = tag.getOrder(); List<String> tagsIds = new ArrayList<String>(); List<SocioTag> leaves = tag.getLeaves(); for (SocioTag leaf : leaves) { tagsIds.add(leaf.getUniqueId()); } q.field("tagId").hasAnyOf(tagsIds); } if (order.equals(SocioTag.ASCENDING_ORDER)) { q.order("-messageDate"); } else { q.order("messageDate"); } q.limit(tags.getRange()); List<GeneralMessage> messagesList = new ArrayList<GeneralMessage>(); Iterable<UnreaddenMessage> messages = q.fetch(); for (UnreaddenMessage unreaddenMessage : messages) { messagesList.add(unreaddenMessage.getMessage()); } tags.setSelectedTag(tagId); ds.save(tags); return messagesList; }