Strange problems on using selectmany_checkboxlist with selectitems

Question

Hello all.
I try to get selectmany_checkboxlist (JSF 1.0 Beta) working with selectitems but it seems
that there are several conversions problems. My JSP page is defined as follows:
<h:form id="registrationForm">
  <h:selectmany_checkboxlist id="credentials"  value="#{UserAccount.credentials}" required="true">
     <f:selectitems value="#{UserAccount.credentialItems}"/>
  </h:selectmany_checkboxlist>
  <h:messages styleClass="message-validation" for="credentials"/>                     
  <h:command_button id="submit" action="success" value="Submit">
<h:form id="registrationForm">Minimum one checkbox has to be selected. The messages tag shows
- if nothing is selected : Validation-Error: No Values (This is OK)
- if one is selected : Conversion Error : Value 'null' for Modell 'expression'.
- after submit : Conversion-Error: Value'[Ljava.lang.String;@ed3e63' forModell 'expression'
My Managed-Bean is as follows:
[code]
public class UserAccountBean {
private ArrayList m_CredentialList = null;
public void setCredentialItems(Collection items) {
System.out.println("setCredentialItems " + items);
// Not needed
public Collection getCredentialItems() {
String[] options = {"ERPLOGIN", "CRLUPLOAD", "ADMIN"};
ArrayList items = new ArrayList(options.length);
for (int i = 0; i < options.length; i++) {
items.add(new SelectItem(options, options[i], options[i]));
System.out.println("getCredentialItems " + items);
return items;
public void setCredentials(Object[] credentials) {      
if ((credentials != null) && (credentials.length > 0)) {
int len = credentials.length;
m_CredentialList.clear();
m_CredentialList = new ArrayList(len);
for (int i = 0; i < len; i++) {
m_CredentialList.add(credentials[i]);
System.out.println("setCredentials " + m_CredentialList);
} else {          
System.out.println("setCredentials " + null);
public Object[] getCredentials() {
System.out.println("getCredentials " + m_CredentialList);
try {
return m_CredentialList.toArray();
} catch (NullPointerException e) {return null; }
My faces-config.xml:
<managed-bean>
  <description>Data model containing data of a user account</description>
    <managed-bean-name>UserAccount</managed-bean-name>
    <managed-bean-class>model.UserAccountBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
</managed-bean>What is wrong about this? Any idees?
Heinz

Answer 1

I believe the problem is a bug in the beta RI that chokes on "Object[]" as the type of the selectmany's value, and that "String[]" will work. I also believe this has been fixed since the beta.
-- Adam Winer