[xstream-user] configuring HibernateProxyConverter

[Michael Teixeira]

As part of going from xstream 1.3.1 to xstream 1.4.2, I'm trying to make
use of HibernateProxyConverter.

So I've changed the xstream configuration from, in 1.3.1:

         this.xstream = new XStream();
        xstream.registerConverter(new
JavaBeanConverter(xstream.getMapper()), XStream.PRIORITY_VERY_LOW);
        Mapper mapper = xstream.getMapper();
        xstream.registerConverter(new HibernateCollectionConverter(mapper));
        xstream.addDefaultImplementation(java.util.ArrayList.class,
org.hibernate.collection.PersistentList.class);
        xstream.addDefaultImplementation(java.util.HashMap.class,
org.hibernate.collection.PersistentMap.class);
        xstream.addDefaultImplementation(java.util.HashSet.class,
org.hibernate.collection.PersistentSet.class);
        xstream.addDefaultImplementation(java.util.ArrayList.class,
org.hibernate.collection.PersistentBag.class);
        xstream.alias("java.util.ArrayList",
org.hibernate.collection.PersistentBag.class);

to, in 1.4.2:

        xstream = new XStream() {
            protected MapperWrapper wrapMapper(final MapperWrapper next) {
                return new HibernateMapper(next);
            }
        };
        xstream.registerConverter(new HibernateProxyConverter());
        xstream.registerConverter(new
HibernatePersistentCollectionConverter(xstream.getMapper()));
        xstream.registerConverter(new
HibernatePersistentMapConverter(xstream.getMapper()));
        xstream.registerConverter(new
HibernatePersistentSortedMapConverter(xstream.getMapper()));
        xstream.registerConverter(new
HibernatePersistentSortedSetConverter(xstream.getMapper()));

That more or less seems to work, with this exception:

I have a java class that represents a relational table that is being
serialized by xstream.  But this class has some transient properties along
with the usual persistent properties that map to database columns.

Some of these transient properties are also java classes that I've defined.
 Something simple like a class that holds a name and value with a getter
and setter.

In my prior code, using xstream 1.3.1 and JavaBeanConverter, these
contained class instances were serialized and deserialized without issue.
 In the 1.4.2 code, though, these properties are not serialized, they are
omitted.

So it would seem that HibernateProxyConverter does not handle these.

I've been trying, without success, to add a second converter to handle
these.  I'm not sure that's the correct approach, though.  In general, I
could use some help, or guidance, on how best to do this.

Thanks,
Michael