Re: The easiest framework for Java Database applications development released for production use

yaormaAdmin wrote:


You assume I would write code like that. I wouldn't, normally. In a toy
example where everything fits in one 'main()' call, there's not much you can
conclude about the utility of a framework.

The question isn't whether you can simplify a single call to a database for a
single hard-coded query. The question is whether you can build a robust,
stable, extendible application backed by a database. Knocking away a couple
of 'close()' calls is of minor value in such a context.

But to answer your question for the toy example, something similar to

  public class Foo
  {
    @PersistenceContext( unitName = "pcontext" )
    private EntityManager em;

    public List <Message> findMessages()
    {
      final CriteriaQuery <Message> cq =
             em.getCriteriaBuilder().createQuery( Message.class );

      cq.select( cq.from( Message.class ));

      return em.createQuery( cq ).getResultList();
    }

    public static void main( String [] args )
    {
      System.out.println( new Foo().findMessages() );
    }
  }

Or I might use a JQL query instead of the 'CriteriaQuery'. It's just that the
criteria approach is amenable to generic treatment - my actual code has a type
parameter for the 'Message' type.

--
Lew
Ceci n'est pas une fen??tre.
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