EntityManagerFactory null ?

[gbasilico]

Hello,
I want to access an entity from the client side, without using a session bean (If i use a session bean it works fine). I made a simple entity class :

@Entity
public class Produit implements Serializable {

 @Id
 private String id;
 private String libelle;
 private int quantiteEnStock;

 public Produit() {
 super();
 }

 public Produit(String id) {
 this.id = id;
 }

 public Produit(String id, String libelle, int quantiteEnStock) {
 this.id = id;
 this.libelle = libelle;
 this.quantiteEnStock = quantiteEnStock;
 }

 public String getLibelle() {
 return libelle;
 }
...

I have also made a persistence.xml, which i put in the META-INF directory :

<persistence>
 <persistence-unit name="Produit">
 <provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/DefaultDS</jta-data-source>
 <properties>
 <property name="hibernate.hbm2ddl.auto" value="update"/>
 <property name="jboss.entity.manager.factory.jndi.name" value="Produit"/>
 </properties>
 </persistence-unit>
</persistence>

On the client side, i have the following code :

Hashtable env = new Hashtable();
env.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
env.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
env.put("java.naming.provider.url","localhost:1099");

Context ctx = new InitialContext(env);

NamingEnumeration ne = ctx.list("");
while(ne.hasMore())
{
 NameClassPair nc = (NameClassPair)ne.next();
 System.out.println("Entry is ... "+nc.getName()+" -- "+nc.getClassName());
}
Object obj = ctx.lookup("Produit");
System.out.println(obj.toString());

I can see the "Produit" in the list (it's type is org.jboss.ejb3.entity.InjectedEntityManagerFactory) but the lookup returns null. I also tried with

EntityManagerFactory emf = javax.persistence.Persistence.createEntityManagerFactory("Produit");

but it doesn't work either.
Do you have any clue of what i am doing wrong ? Is it at least possible ?
I'm using JBoss 4.0.5 and Eclipse 3.2.
Thanks in advance for your help.
Regards,

Guillaume Basilico