To me, this has the habit of Berberis, can't be sure though.
Berberis thunbergii is close, and on the map not far from you.
http://plants.usda.gov/java/pr...
Berberis aristata is similar too, they don't have to be native as seed can be carried by birds.
http://www.motherherbs.com/ber...
http://en.wikipedia.org/wiki/B...
Best wait for flowers I think.
