JPA Criteria API

JPA Criteria API

Count
CriteriaBuilder critBuilder = entityManager.getCriteriaBuilder(); 
CriteriaQuery<Long> critQuery = criteriaBuilder.createQuery(Long.class); 
Root<Foo> root = critQuery.from(Foo.class);  
critQuery.select(critBuilder.countDistinct(root)); 
int count = entityManager.createQuery(critQuery).getSingleResult().intValue();

 

 Result

CriteriaBuilder critBuilder = entityManager.getCriteriaBuilder(); 
CriteriaQuery<Long> critQuery = criteriaBuilder.createQuery(Long.class); 
Root<Foo> root = critQuery.from(Foo.class);  
critQuery.select(root).distinct(true); 
List<Foo> result = entityManager.createQuery(critQuery).getResultList();