How to get the required fields data from an Entity to VO object using Spring Data MongoDB

In Spring Data Jpa we have a flexibility to map the required fields query result to a VO object with out exposing the entity object outside.

DB Used :: mysql

1st way ::

@Query("SELECT new CountryVO(c.id,c.name) FROM Country c")
public List<CountryVO> getCountries();

//Country Entity

public class Country{
    private long id;
    private String name;
    @DBRef 
    private State state;
}    

// State Entity

   public class State{
       private long id;
       private String name;
   }  

//Country VO

public class CountryVO{
    private long id;
    private String name;
    private String stateName;
}

2nd way ::

@Query("SELECT DISTINCT c.name FROM Country c")
public List<String> getNames();

Now my point is I am using Spring Data mongoDB with mongoDB database and here the querying way is different like below

@Query(value = "{}", fields = "{'id':1,'name':1,'state.name':1}")
List<CountryVO> getAllCountries();

In the above query we can mention what ever fields we want in the fields attribute and the remaining fields will come as null values, but I want to map the output result to a VO like Spring Data Jpa.

Please let me know any possibilities

Thanks in Advance