Chain Multiple Reduce in ChainReducer

I have are requirement to chain a map redu开发者_如何学Cce job like this using map reduce chaining. [Map --> Reduce --> Map --> Reduce -- > Map --> Map]. Looking at Javadocs of ChainReducer I get the feeling that this is not possible. (It says it supports the form of [MAP+ / REDUCE MAP*] which is not exactly what I want.) Is there a way to achieve this using Map Reduce API?