用java JPA进行多表join

例如我们有如下多表查询

select A.id, A.name, B.name2, C.name2 from A,B,C where A.id=B.bid and B.name3 = C.id 

我们用Join连接 JPA tables

//    Root rootpath   Entity A,B,C  in B has relasionship B.name3 = C     Join b_path = rootpath.join("id");  
Join c_path = b_path.join("name3");