How to use Google QPX API with Java for flight search? - api

Question

I am trying to build a simple Java code that obtains flight options using Google QPX API, for the flight from New York to London. I signed up with Google and got API_key.
I read the documentation, but unfortunately, I couldn't find any example that show me how to do it.
Here what I tried so far:
import com.google.api.services.qpxExpress.model.*;
import java.util.*;
public class Main
{
public static void main(String[] args)
{
// Passengers
PassengerCounts passengers = new PassengerCounts();
passengers.setAdultCount(2);
// Slice
List<SliceInput> slices = new ArrayList<SliceInput>();
SliceInput slice = new SliceInput();
slice.setOrigin("JFK"); // John Kennedy Airport in Ney York
slice.setDestination("LHR"); // London Heathrow
slice.setDate("2015-07-01");
slices.add(slice);
// Options request
TripOptionsRequest tripOptions = new TripOptionsRequest();
tripOptions.setPassengers(passengers);
tripOptions.setSlice(slices);
// Search request
TripsSearchRequest tripSearchReq = new TripsSearchRequest();
tripSearchReq.setRequest(tripOptions);
// Next steps?
// Setting up QPXExpress?
}
}
I will appreciate it if someone can help me to complete the code.
Thanks in advance.

Answer 1

This is a simple code, successfully tested, hope it helps
package com.airline.api;
import java.io.IOException;
import java.util.*;
import javax.swing.text.View;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.qpxExpress.QPXExpressRequestInitializer;
import com.google.api.services.qpxExpress.QPXExpress;
import com.google.api.services.qpxExpress.model.FlightInfo;
import com.google.api.services.qpxExpress.model.LegInfo;
import com.google.api.services.qpxExpress.model.PassengerCounts;
import com.google.api.services.qpxExpress.model.PricingInfo;
import com.google.api.services.qpxExpress.model.SegmentInfo;
import com.google.api.services.qpxExpress.model.SliceInfo;
import com.google.api.services.qpxExpress.model.TripOption;
import com.google.api.services.qpxExpress.model.TripOptionsRequest;
import com.google.api.services.qpxExpress.model.TripsSearchRequest;
import com.google.api.services.qpxExpress.model.SliceInput;
import com.google.api.services.qpxExpress.model.TripsSearchResponse;
public class AirlineReservation {
/**
* #param args
*/
private static final String APPLICATION_NAME = "MyFlightApplication";
private static final String API_KEY = "AIzaSyDnBCdsmTnrL5XFrO2TjJyvFioswjakNYU";
/** Global instance of the HTTP transport. */
private static HttpTransport httpTransport;
/** Global instance of the JSON factory. */
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
httpTransport = GoogleNetHttpTransport.newTrustedTransport();
PassengerCounts passengers= new PassengerCounts();
passengers.setAdultCount(1);
List<SliceInput> slices = new ArrayList<SliceInput>();
SliceInput slice = new SliceInput();
slice.setOrigin("NYC");
slice.setDestination("LGA");
slice.setDate("2015-04-29");
slices.add(slice);
TripOptionsRequest request= new TripOptionsRequest();
request.setSolutions(10);
request.setPassengers(passengers);
request.setSlice(slices);
TripsSearchRequest parameters = new TripsSearchRequest();
parameters.setRequest(request);
QPXExpress qpXExpress= new QPXExpress.Builder(httpTransport, JSON_FACTORY, null).setApplicationName(APPLICATION_NAME)
.setGoogleClientRequestInitializer(new QPXExpressRequestInitializer(API_KEY)).build();
TripsSearchResponse list= qpXExpress.trips().search(parameters).execute();
List<TripOption> tripResults=list.getTrips().getTripOption();
String id;
for(int i=0; i<tripResults.size(); i++){
//Trip Option ID
id= tripResults.get(i).getId();
System.out.println("id "+id);
//Slice
List<SliceInfo> sliceInfo= tripResults.get(i).getSlice();
for(int j=0; j<sliceInfo.size(); j++){
int duration= sliceInfo.get(j).getDuration();
System.out.println("duration "+duration);
List<SegmentInfo> segInfo= sliceInfo.get(j).getSegment();
for(int k=0; k<segInfo.size(); k++){
String bookingCode= segInfo.get(k).getBookingCode();
System.out.println("bookingCode "+bookingCode);
FlightInfo flightInfo=segInfo.get(k).getFlight();
String flightNum= flightInfo.getNumber();
System.out.println("flightNum "+flightNum);
String flightCarrier= flightInfo.getCarrier();
System.out.println("flightCarrier "+flightCarrier);
List<LegInfo> leg=segInfo.get(k).getLeg();
for(int l=0; l<leg.size(); l++){
String aircraft= leg.get(l).getAircraft();
System.out.println("aircraft "+aircraft);
String arrivalTime= leg.get(l).getArrivalTime();
System.out.println("arrivalTime "+arrivalTime);
String departTime=leg.get(l).getDepartureTime();
System.out.println("departTime "+departTime);
String dest=leg.get(l).getDestination();
System.out.println("Destination "+dest);
String destTer= leg.get(l).getDestinationTerminal();
System.out.println("DestTer "+destTer);
String origin=leg.get(l).getOrigin();
System.out.println("origun "+origin);
String originTer=leg.get(l).getOriginTerminal();
System.out.println("OriginTer "+originTer);
int durationLeg= leg.get(l).getDuration();
System.out.println("durationleg "+durationLeg);
int mil= leg.get(l).getMileage();
System.out.println("Milleage "+mil);
}
}
}
//Pricing
List<PricingInfo> priceInfo= tripResults.get(i).getPricing();
for(int p=0; p<priceInfo.size(); p++){
String price= priceInfo.get(p).getSaleTotal();
System.out.println("Price "+price);
}
}
return;
} catch (IOException e) {
System.err.println(e.getMessage());
} catch (Throwable t) {
t.printStackTrace();
}
System.exit(1);
}
}