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;
}
public <T, V> Query<T> find(
String kind, Class<T> clazz, String property, V value, int offset, int size) {
Query<T> query = find(kind, clazz);
query.offset(offset);
query.limit(size);
return query.filter(property, value);
}
public List<User> findWithLimitAndOffset(int limit, int offset, String sortField) {
Query<User> findQuery = ds.createQuery(User.class);
if (limit > 0) {
findQuery = findQuery.limit(limit);
}
if (offset > 0) {
findQuery = findQuery.offset(offset);
}
if (null != sortField) {
findQuery = findQuery.order(sortField);
}
if (null == findQuery) {
return null;
}
List<User> users = findQuery.asList();
return (users.isEmpty()) ? null : users;
}