Polymorphic Type Handling

Digital Connect messages definition (schema) uses polymorphic types, where an object of a generic type can be substituted with a concrete object of a more defined type. A derived type inherits all properties of the parent type.

Type of the object is declared in a property “@type”.

Examples

TravelPart - an abstract class consisting of: origin, destination, departure and arrival properties, which is extended by the concrete classes based on the declared "@type:"

• Itinerary;
• Itinerary Part;
• Segment.

@ApiModel(description="Parent class for all travel part data: Segment, ItineraryPart, Itinerary")
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME)
@JsonIdentityInfo(generator = JSOGGenerator.class)
@JsonSubTypes({
        @JsonSubTypes.Type(value = Itinerary.class, name = "Itinerary"),
        @JsonSubTypes.Type(value = ItineraryPart.class, name = "ItineraryPart"),
        @JsonSubTypes.Type(value = Segment.class, name = "Segment") })
public class TravelPart
{

    public enum TravelPartType
    {
        SEGMENT,
        ITINERARY_PART,
        ITINERARY;
    }

An example of the Segment object:

{
     "@type": "Segment",
     "@id": "2",
     "segmentOfferInformation": {
          "flightsMiles": 0,
          "awardFare": false
     },
     "duration": 95,
     "cabinClass": "Economy",
     "equipment": "32S",
     "flight": {
          "flightNumber": 1763,
          "airlineCode": "AZ",
          "operatingAirlineCode": "AZ",
          "stopAirports": [],
          "advisories": []
     },
     "origin": "LIN",
     "destination": "PMO",
     "departure": "2016-08-01T09:35:00",
     "arrival": "2016-08-01T11:10:00",
     "bookingClass": "Q",
     "layoverDuration": 0,
     "fareBasis": "QOWLGN1"
} 

An example of the ItineraryPart object:

{
  "@type": "ItineraryPart",
  "@id": "37",
  "segments": [
    {
      "@type": "Segment",
      "@id": "38",
      "segmentOfferInformation": {
        "flightsMiles": 0,
        "awardFare": false
      },
      "duration": 75,
      "cabinClass": "Economy",
      "equipment": "E75",
      "aircraftLeaseText": "ALITALIA CITYLINER SPA",
      "flight": {
        "flightNumber": 1023,
        "airlineCode": "AZ",
        "operatingAirlineCode": "AZ",
        "stopAirports": [],
        "advisories": []
      },
      "origin": "MXP",
      "destination": "FCO",
      "departure": "2016-08-01T19:25:00",
      "arrival": "2016-08-01T20:40:00",
      "bookingClass": "L",
      "layoverDuration": 0,
      "fareBasis": "LOWLGN4"
    },
    {
      "@type": "Segment",
      "@id": "39",
      "segmentOfferInformation": {
        "flightsMiles": 0,
        "awardFare": false
      },
      "duration": 70,
      "cabinClass": "Economy",
      "equipment": "319",
      "flight": {
        "flightNumber": 1783,
        "airlineCode": "AZ",
        "operatingAirlineCode": "AZ",
        "stopAirports": [],
        "advisories": []
      },
      "origin": "FCO",
      "destination": "PMO",
      "departure": "2016-08-01T21:30:00",
      "arrival": "2016-08-01T22:40:00",
      "bookingClass": "L",
      "layoverDuration": 0,
      "fareBasis": "LOWLGN4"
    }
  ],
  "stops": 1,
  "totalDuration": 195,
  "connectionInformations": [
    {
      "@id": "40",
      "duration": 50,
      "changeOfAirport": false
    }
  ],
  "bookingClass": "L",
  "advisories": []
}