@GET @Produces({"application/xml", "application/json"}) public Collection<Project> findAll(@Context HttpServletRequest request) { Authentication.assertUserHasAccess(request); Object idUser = Authentication.getUserId(request); User user = em.find(User.class, (Integer) idUser); System.out.println( "Username: " + user.getUsername() + user.getIdUser() + user.getProjectCollection().toString()); return user.getProjectCollection(); }