rest.FlightReservation.java Source code

Introduction

Here is the source code for rest.FlightReservation.java

Source

/*
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package rest;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import deploy.DeploymentConfiguration;
import entity.FlightInstance;
import exception.FlightException;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import us.monoid.json.JSONException;

/**
 *
 * @author Andreas Styltsvig
 */
@Path("flightreservation")
public class FlightReservation {

    private static EntityManagerFactory emf = Persistence
            .createEntityManagerFactory(DeploymentConfiguration.PU_NAME);
    private static EntityManager em = emf.createEntityManager();
    private static Gson gson = new GsonBuilder().setPrettyPrinting().create();

    @POST
    @Produces(MediaType.APPLICATION_JSON)
    public Response reservation(String jsonReservation) throws IOException, JSONException, FlightException {
        JsonObject jsonObj = new JsonParser().parse(jsonReservation).getAsJsonObject();

        FlightInstance flight = em.find(FlightInstance.class, jsonObj.get("flightID").getAsString());
        int numberOfSeats = 0;
        try {
            numberOfSeats = Integer.parseInt(jsonObj.get("numberOfSeats").getAsString());
        } catch (Exception e) {
        }

        if (flight.getAvailableSeats() > numberOfSeats) {
            flight.setAvailableSeats(flight.getAvailableSeats() - numberOfSeats);
            em.getTransaction().begin();
            em.merge(flight);
            em.getTransaction().commit();
            jsonObj.remove("ReservePhone");
            jsonObj.remove("ReserveeEmail");
            jsonObj.addProperty("Origin",
                    flight.getOrigin().getCity() + " (" + flight.getOrigin().getIatacode() + ")");
            jsonObj.addProperty("Destination",
                    flight.getDestination().getCity() + " (" + flight.getDestination().getIatacode() + ")");
            DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
            Date date = flight.getDepartureDate();
            Date time = flight.getDepartureTime();
            date.setHours(time.getHours());
            date.setMinutes(time.getMinutes());
            String newDate = df.format(date);
            jsonObj.addProperty("Date", newDate);
            jsonObj.addProperty("FlightTime", flight.getTravelTime());
        } else
            throw new FlightException("Not enough available seats");

        return Response.accepted(gson.toJson(jsonObj)).build();

    }
}