Selecting All JPA Entities As Criteria Query 📎
You could define a NamedQuery "SELECT c FROM ConfigurationEntry c" or use a type safe criteria variant in JPA 2+:
@PersistenceContext
EntityManager em;
public List<ConfigurationEntry> allEntries() {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<ConfigurationEntry> cq = cb.createQuery(ConfigurationEntry.class);
Root<ConfigurationEntry> rootEntry = cq.from(ConfigurationEntry.class);
CriteriaQuery<ConfigurationEntry> all = cq.select(rootEntry);
TypedQuery<ConfigurationEntry> allQuery = em.createQuery(all);
return allQuery.getResultList();
}
This post is bit selfish: now I have a cheat sheet to lookup the first three lines. I just cannot remember these.
See you at Java EE Workshops at MUC Airport!
The snippet was stolen from: https://github.com/AdamBien/e2ftp