public ArrayList<UserComment> retrieveEntryComments(String userId, long partId) {
Entry entry = dao.get(partId);
if (entry == null) return null;
authorization.expectRead(userId, entry);
// comments
ArrayList<Comment> comments = commentDAO.retrieveComments(entry);
ArrayList<UserComment> userComments = new ArrayList<>();
for (Comment comment : comments) {
userComments.add(comment.toDataTransferObject());
}
return userComments;
}
