Data-Bars in POI

I have been hunting around for a way to implement data-bars in an Excel
file using POI. We are currently using Scott's HSSF utility, but the
getDataBarFormatting, and other required methods, are not defined. I was
curious if anybody has been able to successfully implement them into their
RPG code, and if so, if they had any examples I could mooch off of them.
I've found 1 or 2 examples where this was implemented in a Java program
(using the Apache POI tool set), but I'm having a really hard time with
prototypes, and I was hoping somebody out there had tried and succeeded
before me.

Thanks in advance for any help!