Maven / Bundler Question

I saw a mention that JRuby 1.5 supported maven artifacts as gems but I
cannot find any documentation on this anywhere. I am trying to use some
java code that I have packaged as a jar in a Rails project and it would
nice to be able to just include that in the Gemfile rather than having
manually put in in the classpath or reference a full path to the file.
help is greatly appreciated.