[armedbear-devel] integrating abcl into Protege

[Mark Evenson]

On Mar 10, 2010, at 9:14 PM, Alan Ruttenberg wrote:

> Protege is an ontology development tool. I'm interested in using abcl
> to develop plugins and TIm Redmond was kind enough to have a stab at
> doing a first pass integration, but ran into trouble. I wonder if his
> report makes rings a bell?


Attached is an untested patch that takes a stab at fixing the problem
of loading ABCL from an OSGi loader like that present in Protege.
It's going to take me a bit of time to get to a place where I can
test this, so maybe someone else with a working Protege development
environment could at least tell me if it either works (yay!), looks
promising (heh!), or just fails (boo!).

The patch is very hackish and preliminary, as by loading from OSGi
bundles we will no longer have the property that all arguments to
LOAD-SYSTEM-FILE are expressible as a Pathname.  I expect that this
means that *LOAD-TRUENAME* isn't going to work very well, but I
don't think this is going to prevent the system from at least
initializing.

I think the right approach to minimize the abstraction perturbation
in the system load routines is to figure out a manner to express
an arbitrary URL that Java groks via java.net.URL as a Lisp Pathname
(not just a "jar:" or "file:" URLs as is the current behavior).  I
think I once read (maybe in the SBCL source?) a proposal where
Pathname HOST was to be potentially treated as a URL.  Does anyone
know of a Lisp that fits URLs into Pathname that we could study as
a proposal?  If we want URLs to be fairly opaque to the rest of
Pathname (i.e. no MERGE-PATHNAME semantics etc.), it would probably
be pretty easy to push this into the HOST part of Pathname, which
is currently only used for logical pathnames and UNC path support
under Windows.  This probably means that logical pathnames couldn't
be used to refer to arbitrary URLs, but I would have to think about
it a bit.


Supporting OSGi (and Eclipse in general) is an important goal for
ABCL, so we (I?) will try to diligently to get quickly get support
for loading the ABCL base system from an OSGi loader.

 
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