XML API persistence

Question

Hi,
I would like to know if there is a java XML persistence api out there?
In fact,I want an api like hibernate which can persist/retrieve plain old java objects to/from an xml store which conforms to a given schema. This schema defines foreign key,but objects use aggregation like in hibernate mapping.
Let me explain you the problem behind this problem.I've used hibernate to persist some objects to a relational database.Now I want to persist/retrieve these objects to/from a xml store which is an instance of a schema. This xml schema is in fact an xml version of the database schema. Of course, I don't want to modify existing pojo classes. I just want another persistence(an xml one) implementation.
I've seen JAXB,but it constraints me to use classes that it has generated,isn't it(please correct me if I am wrong)? Moreover,it doesn't seem to persist objects to aggregation
Thanks.

Answer 1

Another thing that you can do (which doesn't seem to be documented) is to set a 'persistenceDelegate' attribute in your BeanDescriptor for your class, like this:
DefaultPersistenceDelegate delegate = new DefaultPersistenceDelegate( new String[] {"name", "hostAddress", "serverPath", "modulePath", "sourceBaseDir", "classPool"} );
try {
     Introspector.getBeanInfo( YourClass.class ).getBeanDescriptor().setValue( "persistenceDelegate", delegate );
} catch( IntrospectionException e ) {
     throw new RuntimeException( e );
}This will be picked up by XMLEncoder automatically.