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Combining JPA And/Or Criteria Predicates

I want to query like: (sku = 'A' AND uom_code = 'B') OR (sku =
C' AND uom_code = 'D')
But my predicate generate such as (sku = 'A' AND uom_code = 'B' OR sku = 'C' AND uom_code = 'D')
how to fix it. Thank you.
public class VariantSpecification implements Specification<VariantModel> {
private final VariantFilter filter;
public VariantSpecification(VariantFilter filter) {
this.filter = filter;
}
#Override
public Predicate toPredicate(
Root<VariantModel> root,
CriteriaQuery<?> query,
CriteriaBuilder cb
) {
final List<Predicate> predicates = new ArrayList<>();
if (filter.getMerchantId() != null) {
predicates.add(cb.equal(root.get("merchantId"), filter.getMerchantId()));
}
Predicate predicate = cb.and(predicates.toArray(new Predicate[0]));
List<Predicate> predicatesMap = new ArrayList<>();
if (!CollectionUtils.isEmpty(filter.getSkusUoms())) {
filter.getSkusUoms().forEach(pair -> {
String sku = pair.getLeft();
String uom = pair.getRight();
Predicate predicateSku = cb.equal(root.get("sku"), sku);
Predicate predicateUom = cb.equal(root.get("uomCode"), uom);
predicatesMap.add(cb.or(cb.and(predicateSku, predicateUom)));
});
}
if (!predicatesMap.isEmpty()) {
Predicate predicateSector = cb.or(predicatesMap.toArray(new Predicate[0]));
return cb.and(predicate, predicateSector);
}
return predicate;
}
}

Yeah my mistake,
SELECT ... FROM ... WHERE (expression1 AND expression2) OR (expression3 AND expression4)
SELECT ... FROM ... WHERE expression1 AND expression2 OR expression3 AND expression4
According to the SQL specification, both statements mean the same thing. It doesn't matter whether the statement contains the () or not, so Hibernate doesn't use them. The order of precedence is like this, similar to 1+2*3 is the same as 1+(2*3).

Write query in CriteriaBuilder using Optional<T>

#Query(value = "select usd from UserDetail usd where usd.phoneNumber=:phoneNumber")
Optional<UserDetail> findByPhoneNumber(#Valid #Param("phoneNumber") String phoneNumber);
This is my JPQL query method and I am here using return type with Optional. I wonder how to write using CriteriaBuilder?
I wrote like this but I am getting an error.
#Override
public Optional<UserDetail> findByCreatedDate(String phoneNumber) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<UserDetail> cq = cb.createQuery(UserDetail.class);
Root<UserDetail> root = cq.from(UserDetail.class);
cq.where(cb.equal(root.get("phoneNumber"), phoneNumber))
.orderBy(cb.desc(root.get("phoneNumber")));
return em.createQuery(cq).getResultList().get(3);
}

If the method return type is Optional that is what exactly you must return.
The line em.createQuery(cq).getResultList().get(3) returns only UserDetail so you need to wrap it to Optional.of:
#Override
public Optional<UserDetail> findByCreatedDate(String phoneNumber) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<UserDetail> cq = cb.createQuery(UserDetail.class);
Root<UserDetail> root = cq.from(UserDetail.class);
cq.where(cb.equal(root.get("phoneNumber"), phoneNumber))
.orderBy(cb.desc(root.get("phoneNumber")));
return Optional.of(em.createQuery(cq).getResultList().get(3));
}
By the way, are you sure the hardcoded .get(3) is what you want? If the list is empty or has less than 4 elements, it would throw a runtime exception.

if a phone number is associated with only one person why are you trying to get a list ?
have a look to this :
#Override
public Optional<UserDetail> findByCreatedDate(String phoneNumber) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<UserDetail> cq = cb.createQuery(UserDetail.class);
Root<UserDetail> root = cq.from(UserDetail.class);
cq.where(cb.equal(root.get("phoneNumber"), phoneNumber)).orderBy(cb.desc(root.get("phoneNumber")));
UserDetail ud = em.createQuery(cq).getSingleResult();
return ud == null ? Optional.empty() : Optional.of(ud)
}
Regards,

Dynamic COUNT in JPA throws NullPointerException

My goal is to make a method with which I can retrieve the total number of rows from any table in my database.
This is what I have done:
ENTITY_MANAGER_FACTORY = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
EM = ENTITY_MANAGER_FACTORY.createEntityManager();
public static long getRowCount(Root<?> root) {
CriteriaBuilder cb = EM.getCriteriaBuilder();
CriteriaQuery<Long> query = cb.createQuery(Long.class);
root = query.from(root.getClass());
query.select(cb.count(root));
return EM.createQuery(query).getSingleResult();
}
This is how I call the method:
Root<PlacesEntity> placesRoot = null;
DbTools.getRowCount(placesRoot)
It is not working though, the method throws a NullPointerException at the line root = query.from(root.getClass());.

Try this (warning not tested):
public static long getRowCount(Class<?> rootClass) {
CriteriaBuilder cb = EM.getCriteriaBuilder();
CriteriaQuery<Long> query = cb.createQuery(Long.class);
Expression<?> root = query.from(rootClass);
query.select(cb.count(root));
return EM.createQuery(query).getSingleResult();
}
/*****/
DbTools.getRowCount(PlacesEntity.class);
Good luck!

CMIS session.queryObjects doesn't return aspects

I have a couple test functions I've written to illustrate a problem (or at least some behavior that I don't understand). I am just doing some basic CMIS queries on an Alfresco 4.2.e community repository, but am getting some unexpected results depending on whether I use session.query() or session.queryObjects(). Specifically, the queryObjects doesn't return properties for custom aspects. Both return the relationships/associations fine. Am I doing something wrong, or is this a bug? I'm using opencmis 0.10, and the CMIS 1.1 URL.
private static Collection<Document> testCmisObjectQuery(Session session) {
List<Document> rv = new LinkedList<>();
OperationContext opCon = session.createOperationContext();
opCon.setLoadSecondaryTypeProperties(true);
opCon.setIncludeRelationships(IncludeRelationships.BOTH);
ItemIterable<CmisObject> cmisObjs =
session.queryObjects("D:af:insuringFormInstance", null, false, opCon);
for (CmisObject o : cmisObjs) {
Document d = (Document) o;
rv.add(d);
printDocProps(d);
}
return rv;
}
private static Collection<Document> testCmisQuery(Session session) {
List<Document> rv = new LinkedList<>();
String queryString = "SELECT cmis:objectId FROM af:insuringFormInstance";
OperationContext opCon = session.createOperationContext();
opCon.setIncludeRelationships(IncludeRelationships.SOURCE);
ItemIterable<QueryResult> results = session.query(queryString, false);
for (QueryResult qResult : results) {
String objectId = qResult.getPropertyValueByQueryName("cmis:objectId");
Document doc = (Document) session.getObject(session.createObjectId(objectId),opCon);
printDocProps(doc);
rv.add(doc);
}
return rv;
}

Looks like, you are missing a join as in
select d.*, o.* from cmis:document as d join cm:ownable as o on d.cmis:objectId = o.cmis:objectId
Have a look at https://wiki.alfresco.com/wiki/CMIS#Aspect_Query for further details.

How to do a distinct count in JPA critera API?

I would like to do this but with the criteria API instead:
select count(distinct e) from Event e, IN(e.userAccessPermissions) p where p.principal = :principal and p.permission in (:permissions)
Any ideas?

You can use countDistinct on CriteriaBuilder
criteriaQuery.select(criteriaBuilder.countDistinct(entityRoot))

Use c.distinct(true) on your Query.
See http://relation.to/Bloggers/ATypesafeCriteriaQueryAPIForJPA for more samples.

Like this?
Criteria crit = session.createCriteria(Event.class):
crit.createAlias("userAccessPermissions", "p");
crit.add(Restrictions.eq("p.principal", principal);
crit.add(Restrictions.in("p.permission", permissions);
crit.setProjection(Projections.countDistinct("id"));

public long getCount(String xValue){
EntityManager entityManager = this.getEntityManager();
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Long> criteriaQuery = cb.createQuery(Long.class);
Root<MyEntity> root = criteriaQuery.from(MyEntity.class);
criteriaQuery.select(cb.count(criteriaQuery.from(MyEntity.class)));
List<Predicate> predicates = new ArrayList<>();
Predicate xEquals = cb.equal(root.get("x"), xValue);
predicates.add(xEquals);
criteriaQuery.select(cb.countDistinct(root));
criteriaQuery.where(predicates.toArray(new Predicate[0]));
return entityManager.createQuery(criteriaQuery).getSingleResult();
}
With Spring Data Jpa, we can use this method:
/*
* (non-Javadoc)
* #see org.springframework.data.jpa.repository.JpaSpecificationExecutor#count(org.springframework.data.jpa.domain.Specification)
*/
#Override
public long count(#Nullable Specification<T> spec) {
return executeCountQuery(getCountQuery(spec, getDomainClass()));
}