SAP-PI and REST webservice integration

Hi Experts,

                     In what way I can integrate SAP-PI with REST web service which understands HTTP GET/POST?

Do we have any standard blogs explaining the process ?

I need java based solution. What kind of adapter should be used?

scenario will be like this

SAP-ISU<----->sends idoc-<--->SAP-PI<-------> REST webserive

I tried searching in SCN could not find suitable blog.

Regards

Anupam