Map complex JSON with Spring REST template and JacksonJSON converter? [on hold]

I have a JSON response object as follows from a REST API call

 { 
    A{...
     }
    B{...
     }
    C{...
      }
   }

Where A,B,C are independent POJO's

Now using the Spring REST template i can only do

restTemplate.getForXxx(URI,Class<T>)

But my URI returns a JSON which has mutiple nested JSON objects

How to I tackle this JSON Object so as to populate indivuidual POJO's

also in some cases i amy only receive Only two or One so I need to be able to handle all possible response scenarios

Also how do i handle error handling in case the JSON returned cannot be cats into these POJO's

PS: Using jars-Spring-web-3.0.5, Jackson-databind 2.1.0