How to write this query using JPA Criteria query?

Question

Can anyone help me to get the JPA criteria query for the JPA query mentioned below.

SELECT p,l FROM Person p 
LEFT JOIN Language l ON (p.language = l.language an         


        

Answer 1

Assuming that Person has a relation to Language here's what you would do in older Hibernate:

Criteria criteria = entityManager.createCriteria(Person.class);
Criteria languageCriteria = criteria.createCriteria("language");

languageCriteria.add(Restrictions.like("locale", locale));

criteria.add(Restrictions.like("name", name));
criteria.add(Restrictions.between("time", startDate, endDate));

criteria.addOrder(Order.asc("name"));

and my first try at JPA 2.0:

CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery criteria = builder.createCriteria(Person.class);
Root pRoot = criteria.from(Person.class);
Join langJoin = criteria.join("language", JoinType.LEFT);

Predicate conjunction = builder.conjunction();

criteria.where(builder.and(
    builder.like(langJoin.get(Language_.locale), locale),
    builder.like(pRoot.get(Person_.name), name),
    builder.between(pRoot.get(Person_.time), startDate, endDate));

criteria.orderBy(builder.asc(pRoot.get(Person_.name)));

Please let me know if that works for you.

Edit: Updated query to use only one where call.