Hi,all..
I'm implementing multi-select rowdatas using checkox, just like browse.xhtml in seam-dvd does. I put the persistence logic in Query, it works and save some @In operations. but i'am wondering whether it is a suitable to do that. Or anyone has a better solution?thx.

<rich:dataTable id="holeList" var="hole" value="#{holeList.resultList}"
                                             rendered="#{not empty holeList.resultList}">
     <h:column>
          <f:facet name="header">CheckBox</f:facet>
              <h:selectBooleanCheckbox value="#{holeSelections[hole]}" />
         </h:column>
         .......

@Name("holeList")
public class HoleList extends EntityQuery {
     
     @In
     FacesMessages facesMessages;
     
     @Out(scope=ScopeType.EVENT, required = false)
     Map<Hole, Boolean> holeSelections;

     @Factory("holeSelections")
     public void init(){
          holeSelections = new HashMap<Hole, Boolean>();
     }
     ..........
     public void deleteSelected(){
          EntityManager em = this.getEntityManager();
          List<Hole> resultList = this.getResultList();
          
          for (Hole item : resultList) {
               Boolean selected = holeSelections.get(item);
               if (selected != null && selected) {
                    holeSelections.put(item, false);
                    em.remove(item);
               }
          }
          this.refresh();
          facesMessages.add("delAction delete called");
     }
}