JPA BigInteger和长期发行

Question

I have a piece of code like this:

CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Offer> query = cb.createQuery(Offer.class);
Root<Offer> root = query.from(Offer.class);
query = query.select(root).where(cb.equal(root.get(Offer_.companyID), company.getId()));
return em.createQuery(query).getResultList()

Now, this looks nice and dandy, but it gives me problems. Both offer.companyID and company.id are long.

Here's the what log shows me that hibernate is doing:

 Hibernate: SELECT C.id FROM company C INNER JOIN company_operators cm
 ON cm.company_id = c.id WHERE cm.operators_id = '503'

And this is the error I get:

12:47:00,581 ERROR [org.jboss.ejb3.invocation] (http--0.0.0.0-9080-5) JBAS014134: EJB Invocation failed on component OfferRepository for method public java.util.List org.jboss.tools.example.richfaces.data.OfferRepository.getOffersbyMemberId(java.lang.Long) throws java.lang.Exception: javax.ejb.EJBException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long

What could be the problem here?

Answer 1

Well, I think I have found the answer.

One line above the code I have shown was

Company company = companyRepo.getUsersCompany(memberId);

Hence, company.getId() in my query was fetching company entity from postgresql. And in that process, it cast id into 'BigInteger', implicitly.

So what I had to do was explicit cast to Long, and now my method looks like this:

    Company company = companyRepo.getUsersCompany(memberId);
    if (company == null) return null;
    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery<Offer> query = cb.createQuery(Offer.class);
    Root<Offer> root = query.from(Offer.class);
    Long companyId = company.getId();
    query = query.select(root).where(cb.equal(root.get(Offer_.companyID), companyId));
    return em.createQuery(query).getResultList();

Answer 2

It depends on what type you have specified in your entity and in what is in table column. It must be same. Check if both are same.

Answer 3

In your entity, you have Long for the numbers. You need to change those into BigInteger . Your JPA is returning you BigInteger .

Change these things like below:

private Long id;

with

private BigInteger id;