Sortable DataTable in Tomahawk...

[Airstorm]

I'm attempting to write a small demo demonstrating the Tomahawk components
using Seam, MyFaces, and Facelets. However, I can't get the sortable table
component to work correctly at all. Here are some code snippets...

          <t:dataTable value="#{userlist.users}" 
                       var="u" 
                       renderedIfEmpty="false" 
                       sortColumn="#{userlist.sort}"
                       sortAscending="#{userlist.ascending}"
                           rows="1000">            
            <h:column>
              <f:facet name="header">
                <t:commandSortHeader columnName="username" arrow="true"
immediate="false">
                  <h:outputText value="username"/>
                </t:commandSortHeader>
              </f:facet>
              <h:outputText value="#{u.username}"/>
            </h:column> 
            <h:column>
              <f:facet name="header">
                <t:commandSortHeader columnName="password" arrow="true"
immediate="false">
                  <h:outputText value="password"/>
                </t:commandSortHeader>
              </f:facet>
              <h:outputText value="#{u.password}"/>
            </h:column>        
          </t:dataTable>

@Stateful
@Name("userlist")
@Scope(ScopeType.SESSION)
@Interceptors(SeamInterceptor.class)
public class UserSearchBeanIMPL implements UserSearchBean
{
    @PersistenceContext
    private EntityManager em;
        
    //@DataModel
    private List<User> users;
    /[EMAIL PROTECTED]
    private User user;*/
 
    private String sortColumn;
    boolean ascending = false;
    
    public String listUsers()
    {
        sortColumn = "username";
        users = em.createNativeQuery("SELECT * FROM
USERDATA.MASTER_USER_TBL", User.class).setMaxResults(10).getResultList();
        
        return "test";
    }
    
    public List getUsers()
    {
        doSort();
        return users;
    }
    
    public String getSort()
    {
        return sortColumn;
    }
    
    public void setSort(String abc)
    {
        if(abc.equals(this.sortColumn))
            ascending = !ascending;
        this.sortColumn = abc;
    }
    
    public void doSort()
    {
        Comparator c = new Comparator()
        {
            public int compare(Object o1, Object o2)
            {
                User user1 = (User)o1;
                User user2 = (User)o2;
                if(sortColumn.equals("username"))
                {
                    String one = user1.getUsername();
                    String two = user2.getUsername();
                    if(ascending)
                    {
                        return one.compareTo(two);
                    }
                    else
                    {
                        return two.compareTo(one);
                    }
                }
                if(sortColumn.equals("password"))
                {
                    String one = user1.getPassword();
                    String two = user2.getPassword();                    
                    if(ascending)
                    {
                        return one.compareTo(two);
                    }
                    else
                    {
                        return two.compareTo(one);
                    }
                }
                return 0;
            }
        };
        Collections.sort(users, c);
    }
    
    public boolean isAscending()
    {
        return ascending;
    }
    
    public void setAscending(boolean ascending)
    {
        this.ascending = ascending;
    }
}

It's calling the "setSort" method on my bean, but it always passes the same
column regardless of which commandSortHeader I click on. I'm completly lost
as to what I've done wrong. Any ideas?
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