Support for Hibernate6 collection

[luczus]

In this merge request (MR), I would like to introduce support for Hibernate 6 collections. In Hibernate 6, the collection classes were moved to the new package: org.hibernate.collection.spi.*.

This MR makes the following changes:
Updates the imports for the collection classes to the new package.

Thank you for your consideration.

[rani111agrawal]

Hi @luczus
Could you please share the steps to build this jar on our local development environment? I am currently unable to build the jar on my setup. Alternatively, if possible, could you share the jar with the applied changes?

cc @joehni

[luczus]

HHi @rani111agrawal ,

I have not built the new version of the XStream library. I've applied the patch manually..

public class MyXStream extends XStream {

  public MyXStream() {
        super();
        this.registerConverter(new HibernateProxyConverter());
        this.registerConverter(new Hibernate6PersistentCollectionConverter(getMapper()));
        this.registerConverter(new Hibernate6PersistentMapConverter(getMapper()));
    }

    @Override
    protected MapperWrapper wrapMapper(final MapperWrapper next) {
        return new Hibernate6Mapper(next);
    }

    protected void registerConverters() {
        this.registerConverter(new HibernateProxyConverter());
        this.registerConverter(new Hibernate6PersistentCollectionConverter(getMapper()));
        this.registerConverter(new Hibernate6PersistentMapConverter(getMapper()));
    }
}