JSF Conversion error for h:selectManyListbox

Thanks BaluC for responding.

Did you mean that in the following code, myBean.roleId has to be necessarily an arraylist too apart from the fact that myBean.availableUsersList is infact an ArrayList from where the selectitems would be populated?

<h:selectManyListbox id="availableUsers" value="#{myBean.roleId}" converter="javax.faces.Long"

I tried using a List<Long>, but getting another error now, any help would be greatly appreciated, thanks!

Error:
[8/15/08 0:11:32:692 IST] 0000007e jsf E com.sun.faces.context.FacesContextImpl addMessage Adding Message[sourceId=emailmessage:selectedUsers,summary=Validation Error: Value is not valid)


JSF Code:
h:selectManyListbox id="selectedUsers" binding="#{myBean.selectedUsersListBox}" value="#{myBean.recipientIdList}" size="5"
converter="#{myBean.recipientIdListConverter}" style="width: 138px; height: 102px">
<f:selectItems id="selectedUsersItem" value="#{myBean.recipientList}" binding="#{myBean.selectedUsersListBoxSelectItems}" />
</h:selectManyListbox>


backing Bean Code for class myBean:

{code}public List recipientList;
private ArrayList recipientIdList;
private HtmlSelectManyListbox selectedUsersListBox;
private UISelectItems selectedUsersListBoxSelectItems;


public Converter getRecipientIdListConverter() {
return new Converter() {
public Object getAsObject(FacesContext facesContext,
UIComponent component, String value)
throws ConverterException {
if (value == null)
return null;

for (Iterator i = recipientIdList.iterator(); i.hasNext();) {
Long item = (Long) i.next();
String val = String.valueOf(item);
if (val.equals(value)) {
return item;
}
}
return null;
}

public String getAsString(FacesContext facesContext,
UIComponent component, Object object)
throws ConverterException {
if (object instanceof SelectItem) {
return ((SelectItem) object).getValue().toString();
} else if (object instanceof Long) {
return String.valueOf(object);
} else {
return object.toString();
}
}

};
}{code}

So have another POJO composed of recipientIdList and recipientList?