As the original error message from TopLink says, it is probably not able
to locate a user defined class called
net.pimpas.np.importer.base.SVCreateDownload. See [1] for more details.
There may be a way to customize TopLink to address this using some kind
of user defined Converter objects, but I doubt that's part of TopLink
Essentials.
[1]
http://java.sun.com/javase/6/docs/api/java/io/ObjectInputStream.html#resolveClass(java.io.ObjectStreamClass)
Paulo Cesar Reis wrote:
> Sure, follow:
>
> // Abstract class that is used by 2 child classes. The field that I am
> talking about is Object object.
>
> // Note that it works perfectly when persisted with EntityManager but when I
> try to insert this object writing the bytes directly in the column (using
> insert statement) toplink is not able to reconstruct the object later.
>
> My entity class is simple like this:
>
> @Entity
> public class MyEntityExample implements Serializable {
> private Long id;
>
> private Serializable object;
>
> @Id
> public Long getId( ) {
>
> }
>
> public void setId( Long id ) {
> this.setId(id);
> }
>
> public Serializable getObject( ) { return this.object; }
> public void setObject(Serializable object) { this.object = object; }
>
> So if I do that;
>
> List<String> values = new ArrayList<String>();
> values.add("a");
> values.add("b");
> MyEntityExample example = new MyEntityExample ();
> example.setId(new Long(1));
> manager.persist(example);
>
> Everything work, I can easily get the object using:
>
> List<String> values2 =
> (List<String>) manager.find(MyEntityExample.class, new
> Long(1)).getObject();
> values.equals(values2); // true
>
> But whether a try this approach:
> CallableStatement cs = connection.prepareCall("INSERT INTO MyEntityExamle
> (ID, OBJECT) VALUES(?, ?)");
> cs.sestLong(1, new Long(1));
> List<String> values = new ArrayList<String>();
> values.add("a");
> values.add("b");
>
> ByteArrayOutputStream out = new ByteArrayOutputStream();
>
> ObjectOutputStream objOut = new ObjectOutputStream(out);
>
> objOut.writeObject( values );
> InputStream stream = new ByteArrayInputStream(out.toByteArray());
>
> cs.setBinaryStream(11, stream, out.toByteArray().length);
>
>
> int res = cs.executeUpdate();
> cs.close();
>
> And later whether I try to load the above object using EntityManager using:
>
> List<String> values2 =
> (List<String>) manager.find(MyEntityExample.class, new
> Long(1)).getObject();
>
> I get de described error.
>
> So which way do I need to write the serializable object so TopLink can
> reconstruct it?
>
> Thanks.
>
>
>
> On 5/4/09 11:58 AM, "glassfish_at_javadesktop.org" <glassfish_at_javadesktop.org>
> wrote:
>
>
>> Can you post your entity class?
>> [Message sent by forum member 'e3133d3' (e3133d3)]
>>
>> http://forums.java.net/jive/thread.jspa?messageID=344852
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe_at_glassfish.dev.java.net
>> For additional commands, e-mail: users-help_at_glassfish.dev.java.net
>>
>>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe_at_glassfish.dev.java.net
> For additional commands, e-mail: users-help_at_glassfish.dev.java.net
>
>