Assigning a value of a <h:selectOneMenu> to a stateless session bean

[germandev.net-seam.wje-online.de]

Hi!

I populated a selectOneMenu with data given from an entity bean called 'domain'.

I created the following .xhtml code:

<h:form>
          <h:selectOneMenu value="#{domain}">
          <s:selectItems var="dom" value="#{user.domains}" label="#{dom.name}" noSelectionLabel="Choose one"></s:selectItems>
          <s:convertEntity />
          </h:selectOneMenu>
          <h:commandButton action="#{manager.action}" value="OK"  type="submit"/>
</h:form>

that generates the following .html output:

<select name="j_id22:j_id23" size="1">
<option value="org.jboss.seam.ui.NoSelectionConverter.noSelectionValue">Choose one</option>
     <option value="0">domain1.net</option>
     <option value="1">domain2.net</option>
</select><input type="submit" name="j_id22:j_id25" value="OK" />

while the values represent the (correct) database index of the related domain names.

I want to work with the selection the user did, so I created the following stateless session bean

@Stateless
@Name("manager")
public class Manager implements IManager 
{
     @In(required = false)
     private Domain domain = null;
     
     public Domain getDomain() {
          return domain;
     }

     public void setDomain(Domain domain) {
          this.domain = domain;
     }

     @Logger private Log log;
     
     public String action()
     {
          log.info("Domain: {0}", (domain != null) ? domain.getName() : "none" ); 
          return null;
     }
}

@Local
public interface IManager
{
     public String action();
}

But when I select an entry and click on the button, the following erorr is thrown:

NFO  [lifecycle] WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=j_id22:j_id23[severity=(ERROR 2), summary=(j_id22:j_id23: Validierungs-Fehler: Wert nicht gültig.), detail=(j_id22:j_id23: Validierungs-Fehler: Wert nicht gültig.)]

while the German stuff means 'Validation error: Value is invalid.'

Do you know what I did wrong?

Thank you in advance!