Apache Neethi:

This is an implementation of WS-Policy Specification (September, 2007) which 
can be located at:  https://www.w3.org/TR/2007/REC-ws-policy-20070904/

It provides a convenient model and an API to process policy information at 
runtime and an extension model for serailization and de-serialization of 
domain specific Assertions. 

Please visit : https://ws.apache.org/neethi/ for further infomation.