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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