Cryille,
Using debug mode, I can see that the group_keys array is being
populated correctly.
The error is appearing on the last line:
List<Group> groups = (List<Group>) q.execute(group_keys);
Thanks,
Jason
On Sep 30, 3:41 am, Cyrille Vincey <crll...@gmail.com> wrote:
> Try :
> Key k = KeyFactory.createKey(User.class.getSimpleName(), Key.getId());
>
> Instead of :
> Key k = KeyFactory.createKey(User.class.getSimpleName(),
> Long.parseLong(Key));
>
> On 30/09/10 01:16, "hendrix.jason" <hendrix.ja...@gmail.com> wrote:
>
>
>
>
>
>
>
> >What could this error mean:
>
> >java.lang.ClassCastException:
> >[Lcom.google.appengine.api.datastore.Key; cannot be cast to
> >com.google.appengine.api.datastore.Key
>
> >It's happening on the last line of this code:
>
> >PersistenceManager pm2 = PMF.get().getPersistenceManager();
> > Key k =
> >KeyFactory.createKey(User.class.getSimpleName(),Long.parseLong(Key));
> > User u = pm2.getObjectById(User.class, k);
>
> > Long[] group_array = u.getGroups();
> > Key[] group_keys = new Key[group_array.length];
> > int c = 0;
> > while(c < group_array.length){
> > group_keys[c] =
> >KeyFactory.createKey(Group.class.getSimpleName(),
> >group_array[c]);
> > c++;
> > }
>
> > javax.jdo.Query q =
> >pm2.newQuery(Group.class,"key.contains(:key)");
> > List<Group> groups = (List<Group>) q.execute(group_keys);
>
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