SerializationException: type not included in serializable type set

Question

In my Google Web Toolkit project, I got the following error:

com.google.gwt.user.client.rpc.SerializationException: Type ‘your.class.Type’ was not included in the se

Answer 1

I have run into this problem, and if you per chance are using JPA or Hibernate, this can be a result of trying to return the query object and not creating a new object and copying your relavant fields into that new object. Check the following out, which I saw in a google group.

     @SuppressWarnings("unchecked") 
    public static List
 getForUser(User user) 
    { 
            List
 articles = null; 
            PersistenceManager pm = PMF.get().getPersistenceManager(); 
            try 
            { 
                    Query query = pm.newQuery(Article.class); 
                    query.setFilter("email == emailParam"); 
                    query.setOrdering("timeStamp desc"); 
                    query.declareParameters("String emailParam"); 
                    List
 results = (List
) query.execute(user.getEmail 
     ()); 
                    articles = new ArrayList
(); 
                    for (Article a : results) 
                    { 
                            a.getEmail(); 
                            articles.add(a); 
                    } 
            } 
            finally 
            { 
                    pm.close(); 
            } 
            return articles; 
    } 

this helped me out a lot, hopefully it points others in the right direction.