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I'm currently in the process of switching from Hibernate to pure JPA 2 (which by the way turned out to be much more time consuming than I initially expected).
The biggest problem I'm having so far is finding a way to force eager loading of lazy properties.
With Hibernate this was done using: criteria.setFetchMode("person", FetchMode.JOIN);.
Is there any way to do this with JPA 2?

Johannes
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1 Answers1

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Try this:

CriteriaQuery<Person> c = cb.createQuery(Person.class);
Root<Person> person = c.from(Person.class);
person.fetch("address");
c.select(person);

Assuming there is a one-to-one relationship between your Person entity and an Address entity.

Jim Tough
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    also if you want to retrieve hierachy elements (the root special case) you should have to use a left join like this. `CriteriaQuery criteria = cb.createQuery(JerarquiaOrganizacional.class); Root jerarquiaOrg = criteria.from(JerarquiaOrganizacional.class); jerarquiaOrg.fetch("jerarquiaOrganizacional", JoinType.LEFT);` – dennisbot Jan 28 '16 at 19:18