integration - Spring security: External Authorization -

i completed login module of application using spring security's inbuilt authentication & authorization mechanism.but later told check if can integrate wso2 (soa solution external authorization mechanism) spring security can use spring security's authentication mechanism alone , wso2 authorization instead of using spring security provided authorization.

i did search & read documentation , details using external authentication spring security & nothing external authorization.i know if can same , how can it.any pointers helpful me.