Reversing a patch in Spring Sync

I would like to know if there is a way to reverse a patch which is already applied, in "Spring Sync"?

Spring Sync: http://ift.tt/1GkSROP

A cursory look at the code in gitHub doesn't hint so. However, I'd wanted to confirm this here.

I am currently evaluating tools which can diff java objects, patch & reverse them. Diff logic should be based on a hash-function which can be provided by user and it should implement LCS.

JsonDiffPatch [http://ift.tt/1l0HBjP] looks promising but it's in JS, and the diff is not in JsonPatch (http://ift.tt/15ucp3Y) RFC format.

Any suggestions welcome.

Thanks