[jboss-user] [JBoss Seam] - Re: pagination problem, advice needed

liudan2005 do-not-reply at jboss.com
Fri Jan 26 11:31:41 EST 2007

Sorry I was trying to explain my situation better but made it worse. Here is my scenario. The person.xhtml page shows all the properties of Person entity. In this page, I need to show top 5 records of person's calls and reviews. Here is the code:

  | <h:outputText value="#{person.name}" />
  |   <h:outputText value="#{person.age}" />
  |   <h:dataTable value="#{person.reviews}" var="review" >
  |     <h:outputText value="#{review.title}" />
  |   </h:dataTable>
  |   <h:dataTable value="#{person.calls}" var="call" >
  |     <h:outputText value="#{call.duration}" />
  |   </h:dataTable>

Paginating for {person} is easy when using Query. but to paginating for {person.reviews} and {person.calls} is not easy.  By now, I have to create a pagination object for each collection based property. If Person has 4 collection type properties (e.g. calls,reviews...), I basically have to create 4 extra pagination objects with customised Hsqls for pagination. It's so time consuming to do it this way. If I use t:dataScroller, I wouldn't have to create those 4 extra objects. But as you said, there's performance problem with t:dataScroller. It would be nice if Seam can provide a s:dataScroller, which support real database based pagination.

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