It occurs to me that making any such policy work will be a real pain for
you or whoever does it if the "make install" targets of the upstream
packages want to use ${datadir}/java as the top of the repository.
This may be a better question for GNU than for Debian. Should we move
the discussion to gnu-java@gnu.org ?
P.S. I'm not on that list.
--
Bruce R. Lewis http://brl.sourceforge.net/