Get object by ID in Hibernate

Question

I noticed that our senior developer uses following code for retrieving entity by ID:

@Override
public Source get(Long id) {
    Session session = getSession();
    if( session == null )
        session = sessionFactory.openSession();
    final Source source = (Source)session.load(Source.class, id);
    Hibernate.initialize(source);
    return source;
}

What is benefit of this code?

Why not simply writing

return (Soruce) getSession().get(Source.class, id);

I guess this was developed with older hibernate version. I think hibernate 3.4 onwards supports getSession(). — kosa, Oct 30 '13 at 17:52
Maybe he also wanted to keep the code "clean" according to the book "Clean Code" by Robert C. Martin instead of writing more than one statement on one line of code. — L.Butz, Oct 30 '13 at 18:04

score 11 · Answer 1 · answered Oct 30 '13 at 19:28

Those 2 pieces of code aren't equivalent.

session.load(Source.class, id);

will throw an exception if there is no Source entity with the identifier id.

getSession().get(Source.class, id);

will return null if there is no Source entity with the identifier id.

Get object by ID in Hibernate

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