I have a 'View Detail' link in my rich:dataTable and I'm passing the selected List object to my action class method.  The List object is always null.  Can you please tell me what I'm doing wrong? how I can get this to work?
Here's my code.

The view xhtml

<rich:dataTable id="auditEventFactList"
                var="_auditEventFact"
              value="#{auditEventFactList.result}"
           rendered="true">
          <h:column>
            <f:facet name="header">Number of attempts</f:facet>
                    <h:outputText value="#{_auditEventFact[0]}"/>
        </h:column>           
        <h:column>
            <f:facet name="header">User</f:facet>
                    <h:outputText value="#{_auditEventFact[1]}"/>
        </h:column>
        <h:column>
            <f:facet name="header">Database Name</f:facet>
                    <h:outputText value="#{_auditEventFact[2]}"/>
        </h:column>
          <h:column>
            <f:facet name="header">Date</f:facet>
                    <h:outputText value="#{_auditEventFact[3]}"/>
        </h:column>                          
        <h:column>
            <f:facet name="header">User Host</f:facet>
                    <h:outputText value="#{_auditEventFact[4]}"/>
        </h:column>
        <h:column>
            <f:facet name="header">User Terminal</f:facet>
                    <h:outputText value="#{_auditEventFact[5]}">
                <f:convertNumber/>
            </h:outputText>
        </h:column>
        <rich:column styleClass="action">
            <f:facet name="header">Action</f:facet>  
               <s:link id="viewAuditFactList" value="View"
                    action="#{auditEventFactList.getAuditEventList(_auditEventFact)}">                                                            
            </s:link>                                  
        </rich:column>
    </rich:dataTable>

The action class method

public void getAuditEventList(List selectedUser){
          System.out.println(selectedUser.size());
          
     }