JavaXPCOM from C++

I'm looking at JavaXPCOM and it looks as if it only supports running
xpcom/xul from within a java app. I have a jvm embedded in my C++ app
and I want to use XPCOM to create a cross-language API. I searched
mozilla.dev.tech.java and found a couple of older posts related to
this stating that this is not supported.

I looked through the code and it seems that much of the needed
infrastructure is in place to handle this. src/nsJavaWrapper.h defines
GetNewOrUsedJavaWrapper() which seems to create/retrieve a proxy for
an XPCOM object. nsJavaXPCOMBindingUtils.h has InitializeJavaGlobals()/
FreeJavaGlobals() which seems to handle the jni setup. Neither of
these headers is included in a xulrunner download so I grabbed them
separately. I can't include nsJavaXPCOMBindingUtils.h without a
#define MOZILLA_INTERNAL_API first and those symbols are not available
in a lib anywhere (I'm using windows xp for now, but will also run on
solaris 10).

First off, am I looking down the correct path to get this working? It
seems that maybe I should do the Initiale/free globals in java code
after I initialze the jvm. I'm not sure how to go about this (I see
the initialize xul code but I've already initialized xpcom and I won't
be using any xul components). I'm also not seeing an exported symbol
for GetNewOrUsedJavaWrapper...maybe I just need to dllimport this? If
you can point me in the correct direction and I'm able to get this
working, I'd be happy to submit any patches I create.