Use gpu on java opencv

Hi, I'm working with the opencv's java wrapper. It's very good, but I miss a thing: how can I use my gpu? I know about umat and tapi, and I'm able to work with them in C++ world. Is there something also in java? I can't see any *.gpu *.ocl packages or Umat class. I know that I can use jni, but I keep it if I cannot do anything else. Thank you