Seam Pros, Newbie needs help. DataTable

[indyjones]

Seam: 2.0.0BETA1
JBoss: 4.2.0
Facelets

I am having problems with a very simple datatable.

Here is my code....

Bean

@Name("usermanager")
@Stateful
@Scope(SESSION)
@Restrict("#{identity.loggedIn}")
public class UserManager implements UserManagerInterface {

 @In
 private User user;

 @In
 private Session inetworkDatabase;

 @Logger
 Log log;

 @DataModelSelection("users")
 @Out(required = false)
 private User selectedUser;

 @DataModel("users")
 private List<User> users;

 @Factory("users")
 public List<User> getUsers() {

 List<User> retUsers = null;

 try{

 if(user != null){

 Criteria criteria = inetworkDatabase.createCriteria(User.class);

 retUsers = criteria.list();

 }else{

 }

 }catch(Exception e){

 }

 return retUsers;
 }

 public void editUser(){

 log.info("**************************************** ");

 }

 @Remove
 public void destroy() { }
}

XHTML

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:rich="http://richfaces.ajax4jsf.org/rich"
 xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
 template="layout/template.xhtml">

 <ui:define name="body">

 <a4j:form ajaxSubmit="true">

 <rich:dataTable id="users"
 rows="10"
 onRowMouseOver="this.style.backgroundColor='#F1F1F1'"
 onRowMouseOut="this.style.backgroundColor='#{a4jSkin.tableBackgroundColor}'"
 var="usr"
 value="#{users}">

 <f:facet name="header">
 <rich:columnGroup>
 <rich:column><h:outputText value="Edit User" /></rich:column>
 <rich:column><h:outputText value="User Name" /></rich:column>
 <rich:column><h:outputText value="First Name" /></rich:column>
 <rich:column><h:outputText value="Middle Name" /></rich:column>
 <rich:column><h:outputText value="Last Name" /></rich:column>
 </rich:columnGroup>
 </f:facet>

 <rich:column>
 <s:link action="#{usermanager.editUser}" value="#{usr.id}"/>
 </rich:column>

 <rich:column><h:outputText value="#{usr.username}" /></rich:column>
 <rich:column><h:outputText value="#{usr.firstname}" /></rich:column>
 <rich:column><h:outputText value="#{usr.middlename}" /></rich:column>
 <rich:column><h:outputText value="#{usr.lastname}" /></rich:column>

 </rich:dataTable>

 <rich:spacer height="20" />

 <rich:datascroller for="users" maxPages="50" />

 <rich:tabPanel switchType="client">

 <rich:tab label="Information">

 <h:panelGrid columns="2">

 <h:outputText value="First Name" />
 <h:inputText value="x" id="fname" />

 <h:outputText value="Middle Name" />
 <h:inputText value="b" id="mname" />

 <h:outputText value="Last Name" />
 <h:inputText value="c" id="lname" />

 </h:panelGrid>

 </rich:tab>

 <rich:tab label="Roles">

 this is where the users roles are listed

 </rich:tab>

 </rich:tabPanel>

 </a4j:form>

 </ui:define>

</ui:composition>

Every thing is ok at startup...

But when i click on the slink, i get this...

14:56:56,515 ERROR [SeamPhaseListener] uncaught exception
javax.el.ELException: javax.ejb.EJBException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to javax.faces.model.DataModel

Why is that?

I know this is a pretty easy question, my apologies, but any help would be really appreciated...

Thanks

indy

[matt.drees]

Instead of

@Factory("users")
public List<User> getUsers() {

 List<User> retUsers = null;
...
 return retUsers;
}

you probably want something like

@Factory("users")
public void getUsers() {

 List<User> retUsers = null;
...
 users = retUsers;
}