File access in the FileBean

Hello all, I am trying to use Stripes in an app that will be hosted on Amazon's AWS. I want to allow file upload and am running into a bit of a problem. Amazon wants me to store the file on S3 passing a byte array. It seems easy enough to do this if I were to have access to the File object in the FileBean, but it is private. So, any thoughts as the the easiest way to gain access to it while in the temp directory? I am trying to minimize the changes I would need to make to the framework. Thanks

Jon