get URL of JNLP launch file
Once delving into the guts of the JNLP API, to do our
own resource caching etcetera, it quickly becomes
obvious that it would be handy to have access to the
JNLP launch file itself, either as an URL, or as a
(org.w3c.dom.)Document.
Note: While the BasicService.getCodeBase() seems
to return the URL that represents a the path to the
directory that contains the launch file, it does not
point to the launch file itself.
Is there some method I missed, that provides
the JNLP file itself?