Combo box , error type !

Question

Hello,
I've got an error I can't find since 2 days ! I'm trying to build a simple combo box in which there are some data from my database . It's to deploy a process under jBoss jBPM but the error is a JSF one :
Here is my JSF form code :
    <jbpm:datacell>
      <f:facet name="header">
        <h:outputText value="Produit desire: "/>
      </f:facet>
       <h:selectOneMenu value="#{genList.value}">
            <f:selectItems value="#{genList.items}" />
       </h:selectOneMenu>
    </jbpm:datacell>Then, here is my genList.java :
public class genList {
     private String value="";
     private Connection conn;
     public genList() {}
     public String getValue() {
          return value;
     public void setValue(String value) {
          this.value = value;
     public Collection getItems() {
          Collection items = new ArrayList();
          SelectItem si = null;
          try{
               //-- Connexion
              Class.forName("com.mysql.jdbc.Driver");
              conn = DriverManager.getConnection ("jdbc:mysql://localhost:3306/databaseName", "root", " ");
              //-- Creation du statement et de la requete
              Statement stmt = conn.createStatement();
              String requete = null;
              requete = "SELECT ID_,NOM_ FROM materiel";
              //-- Execution de la requete
              ResultSet rs = stmt.executeQuery(requete);
              //-- Lecture des donnees
              while (rs.next())
                   si = new SelectItem (String.valueOf(rs.getInt(1)), rs.getString(2));
                   items.add(si);
              //-- Deconnexion
              conn.close();
          } catch(Exception e){
              System.out.println("\n\n\nCONNEXION ECHOUEE: "+e+"\n\n\n");
              System.exit(-1); 
          return items;
}Here is my Face config :
<managed-bean>
      <managed-bean-name>genList</managed-bean-name>
      <managed-bean-class>com.demande.action.genList</managed-bean-class>
      <managed-bean-scope>request</managed-bean-scope>
</managed-bean>Finally here is the error returned :
Argument Error: An option for component j_id48 was not an instance of javax.faces.model.SelectItem. Type found: java.util.ArrayList.
(j_id48 is the name given automatically to the combo box)
I tried a lot of things to repair that error, but nothing works... I can't see where is the problem, if you could help me.
Thanks,
Richard T.

Answer 1

I'm sorry i accidentaly put my topic on the watchlist... I don't know what it is, but I don't know how to correct it ...