Hibernate: check if object exists

Question

Suppose, objects of type A are stored in DB. Here's the way I load specific one from DB using hibernate:

org.hibernate.Session session = ...;
long id = 1;
A obj = session.load(A.class, id);

If object with id=1 doesn't exist I will get ObjectNotFoundException. But is there a way to check if such object exists without having to catch the exception? What I would like to have is smth like:

org.hibernate.Session session = ...;
long id = 1;
boolean exists = session.exists(A.class, id);
if(exists){
 // do smth.....
}

Couldn't find it hibernate docs...

Answer 1

You can use session.get:

public Object get(Class clazz,
                  Serializable id)
           throws HibernateException

It will return null if the object does not exist in the database. You can find more information in Hibernate API Documentation.