Is it possible to override StanzaHandler and other Openfire classes in plugin?

Hello.

For our project, we use extended protocol for user authorization. In particular, we use different <stream:elementName> elements.

Now this extension is done by changing sources of classes:

org.jivesoftware.openfire.net.StanzaHandler

org.jivesoftware.openfire.net.ClientStanzaHandler

org.jivesoftware.openfire.nio.XMLLightweightParser

org.jivesoftware.openfire.session.LocalClientSession

I'm wondering whether it is possible to override these classes from plugin, and not by changing sources and rebuilding Openfire.

It is linked to Can I intercept a stream stanza in an OpenFire Plugin?— the issue is that I need to create session before stanza is rejected as "Unknown packet".

PacketInterceptor and org.xmpp.component.Component#processPacket only get Packets when session is already created.