How to implement the pagination  in the entity bean?

How to implement the pagination in the entity bean? could The rumnum and sub qurey be used in the ejb ql?
Would you mind giving me some methods to implement it?

It's one of J2EE Patterns - Value List Handler.
http://java.sun.com/blueprints/corej2eepatterns/Patterns/ValueListHandler.html
Here is some implementation.
http://valuelist.sourceforge.net/
and some article
http://www.devx.com/Java/Article/21383
Just google "J2EE paging"

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