Loading an Object

gdboling · **Joined:** Fri Jan 16, 2004 4:58 pm **Posts:** 37

I am trying to load an Object where I know the ID. The documentation and the Hibernate In Action book both give similar examples:

Code:

Employee emp = (Employee)session.get(Employee.class, empId);

Where empId is the known identifier. Problem is, the 2.1.4 API doesn't allow this particular get method. It wants (Class, Serializable) or (Class, Serializable, LockMode).

So what is the correct way to retrieve a simple object when the identifier is known? And why does the documentation say that something will work that doesn't?

Thanks.

christian · **Posted:** Fri Aug 06, 2004 11:51 am

Whats wrong with Serializable?

gdboling · **Joined:** Fri Jan 16, 2004 4:58 pm **Posts:** 37

I change my empId to a String and placed it in the get method which works. Still wondering why the docs are a bit vague on that fact though.

christian · **Posted:** Fri Aug 06, 2004 12:01 pm

I don't understand your problem. I don't even know what "empId" is, because you didn't tell me.

gdboling · **Joined:** Fri Jan 16, 2004 4:58 pm **Posts:** 37

Ok, I have a form that asks for an Employee ID number so that I can lookup that employee. The empId is the value I get from the form and it is the ID column in the employee_table.

I understand now that I can just pass my empId as a String to the get() method.

christian · **Posted:** Fri Aug 06, 2004 12:13 pm

No, you should use the appropriate wrapper type to wrap any primitive value to it's Serializable counterpart, not just use String whenever you think it might work. That's basic Java. You won't have to do this anymore in JDK 1.5.

gdboling · **Joined:** Fri Jan 16, 2004 4:58 pm **Posts:** 37

Doh! Thaks Christian. I got it now. The help is always appreciated.