Spring Design JPA including links

Considering a simple model of an event with a "Reservation" object:

Event:

@Entity
public class Event {

   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   private Long eventId;
   private Date start;
   private Date end;
   private String title;

   @OneToMany(mappedBy="event")
   private Set<Booking> Bookings;

   protected Event() {
       // for JPA
   }
   // Getters and setters omitted for brevity
}

      

        
        
        
      

    

Booking:

@Entity
public class Booking { 

   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   private Long bookingId;
   private String title;
   private String contact;

   @ManyToOne
   @JoinColumn(name="event_id", nullable=false)
   private Event event; 

   public Booking() {
      // for JPA
   }
   // Getters and setters omitted for brevity
}

      

        
        
        
      

    

They each have a JpaRepository interface and I created a projection to include the booking information when retrieving the event.

@Projection(name="with-booking", types=Event.class)
public interface EventWithBookingProjection {

    public Date getStart();
    public Date getEnd();
    public String getTitle();
    public List<Booking> getBookings();
}

      

        
        
        
      

    

This works so that orders are returned correctly, but the reservation object does not have its own _links object as it would if I received them myself. How can I get the booking objects with their associated links so that I can operate on the booking objects that have been received?

i.e. instead:

{  
   "id":1,
   "title":"Test Title",
   "bookings":[  
      {  
         "title":"Test 1",
         "contact":"Contact 1"
      },
      {  
         "title":"Test 2 ",
         "contact":"Contact 2"
      }
   ],
   "end":"2015-06-06T11:30:00.000+0000",
   "start":"2015-06-06T09:00:00.000+0000",
   "_links":{  
      "self":{  
         "href":"http://localhost:8080/rest/events/1{?projection}",
         "templated":true
      },
      "bookings":{  
         "href":"http://localhost:8080/rest/events/1/bookings"
      }
   }
}

      

        
        
        
      

    

I want to receive:

    {  
   "id":1,
   "title":"Test Title",
   "bookings":[  
      {  
         "title":"Test 1",
         "contact":"Contact 1",
         "_links":{  
            "self":{  
               "href":"http://localhost:8080/rest/bookings/23{?projection}",
               "templated":true
            },
            "event":{  
               "href":"http://localhost:8080/rest/bookings/23/event"
            }
         }
      },
      {  
         "title":"Test 2 ",
         "contact":"Contact 2",
         "_links":{  
            "self":{  
               "href":"http://localhost:8080/rest/bookings/24{?projection}",
               "templated":true
            },
            "event":{  
               "href":"http://localhost:8080/rest/bookings/24/event"
            }
         }
      }
   ],
   "end":"2015-06-06T11:30:00.000+0000",
   "start":"2015-06-06T09:00:00.000+0000",
   "_links":{  
      "self":{  
         "href":"http://localhost:8080/rest/events/1{?projection}",
         "templated":true
      },
      "bookings":{  
         "href":"http://localhost:8080/rest/events/1/bookings"
      }
   }
}