Can the same CriteriaBuilder (JPA 2) instance be used to create multiple queries?
- by pkainulainen
This seems like a pretty simple question, but I have not managed to find a definitive answer yet. I have a DAO class, which is naturally querying the database by using criteria queries. So I would like to know if it is safe to use the same CriteriaBuilder implementation for the creation of different queries or do I have to create new CriteriaBuilder instance for each query. Following code example should illustrate what I would like to do:
public class DAO() {
CriteriaBuilder cb = null;
public DAO() {
cb = getEntityManager().getCriteriaBuilder();
}
public List<String> getNames() {
CriteriaQuery<String> nameSearch = cb.createQuery(String.class);
...
}
public List<Address> getAddresses(String name) {
CriteriaQuery<Address> nameSearch = cb.createQuery(Address.class);
...
}
}
Is it ok to do this?
