EJB - select a range of objects

Question

People, I have a problem:
I want to display list of EJBs by pages.
something like topics list in this forum.
And I don't know how to make select.
I need something like: findAll( int pageNr, int elementsPerPage)
I know that I could select all objects and then
select objects I need, but this is wastes memory.
Do you have any ideas?

Answer 1

Here's the final solution, I tested it and it works :
I think that the solution is to use
Use EJB QL operators : OFFSET and LIMIT
(for more informations : http://www.caucho.com/resin-ee/ejb-ref/ejbql.xtp#OFFSET)
This solution don't use on my project because i use MVCSoft...
If you use MVCSoft to, you must declare a wrapper in your bean class to put pagination on your EJB QL query :
* @mvcsoft:wrap query-name="ejbSelectMyQuery"
public abstract Collection wrapEjbSelectMyQuery(your query parameters, int start, int length) throws FinderException;
A EJB QL wrapper must return a collection, must contains the same parameters that the ejb query (with the same order) PLUS 2 integers, one for the startOffset and on for the number of records to retrieve...