I have this in my Entity:

private Set<Role> roles = new HashSet<Role>();

and this in my sessionBean:

private List<SelectItem> roles;

I retrieved values for Roles from a selectManyCheckbox:



How can I cast from SelectItems to Role-Items or how can I retrieve the values from selectItems to the Set Roles in an elegantly way ???

I have tried it with that..




But the cast does NOT work. what is wrong?

I'm not sure if it's what you're trying to achieve, but you need to set the role as the "value" on the SelectItem using SelectItem.setValue().

When JSF informs you when SelectItem was selected, you need to grab the "value" back using SelectItem.getValue() - and that Object should cast back to your Role class OK.

I have done that before, but this does not work for me. I got an String-Object and cannot cast it.

I tried it with this:


// rolesGUI is the selected list from the the selectManyCheckbox
for (int i = 0; i < this.rolesGUI.size(); ++i){

// roles is my Role-Object-List
roles.add((Role) (rolesGUI.get(i)).getValue()) ;

}

I got an exception:

Can you show the code where you're binging the roles to the RolsGUI also?

Have you looked at the content of the strings you're getting back?