26 | Extra uninitialised entities spawned on merge().createEntityManager(); em.getTransaction().begin(); Element root = new Element(null, "root"); em.persist(root); em.getTransaction().commit(); Long id = root.getId(); root = em.find(Element.class, id); //now detached, since outside transaction |
5 | javax.persistence.criteria.CriteriaBuilder Expression<Double> sqrt( Expression<?> x) Create an expression that returns the square root of its argument. Create an expression that returns the square root of its argument. Parameters: x - expression Returns: square root Since: JPA 2.0 Expression<String> substring( Expression<String> x, int from) Create |
5 | javax.persistence.criteria.From, PluralJoin, Root, SetJoin Represents a bound type, usually an entity that appears in the from clause ... (Person.class); Root p = q.from(Person.class); q.select(p) .where(cb.isMember ... = cb.createQuery(Person.class); Root p = q.from(Person.class); Path > nicknames = p |
5 | javax.persistence.criteria.Path>, TupleElement<X> Subinterfaces: CollectionJoin, From, Join, ListJoin, MapJoin, PluralJoin, Root, SetJoin ... : CriteriaQuery q = cb.createQuery(Person.class); Root p = q ... "))); rather than: CriteriaQuery q = cb.createQuery(Person.class); Root p |
4 | javax.persistence.criteria.SetJoin q = cb.createQuery(Person.class); Root p = q.from(Person.class); q ... "))); rather than: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class |
4 | javax.persistence.criteria.Join q = cb.createQuery(Person.class); Root p = q.from(Person.class); q ... "))); rather than: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from(Person.class |
4 | sqrt(x)Method javax.persistence.criteria.CriteriaBuilder Expression<Double> sqrt( Expression<?> x ) Create an expression that returns the square root of its argument. Parameters: x - expression Returns: square root Since: JPA 2.0 |
4 | get(attributeName). For example: CriteriaQuery q = cb.createQuery(Person.class); Root p = q ... "))); rather than: CriteriaQuery q = cb.createQuery(Person.class); Root p = q.from |
4 | javax.persistence.criteria.PluralJoin. For example: CriteriaQuery q = cb.createQuery(Person.class); Root ... . >get("nicknames"))); rather than: CriteriaQuery q = cb.createQuery(Person.class); Root |
0 | javax.jdo.PersistenceManager.spi.Detachable interface. Parameters: pc - the root instance to make transient. useFetchPlan ... fetch plan to determine which fields to load and which instances to make transient pcs - the root ... - the root instances to make transient. useFetchPlan - whether to use the current fetch plan to determine |
