CreateCarController.java

package mate.controller;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import mate.lib.Injector;
import mate.model.Car;
import mate.model.Manufacturer;
import mate.service.CarService;
import mate.service.DriverService;
import mate.service.ManufacturerService;
import mate.util.Properties;

@WebServlet("/cars/add")
public class CreateCarController extends HttpServlet {
    private static final Injector injector = Injector.getInstance("mate");
    private final CarService carService = (CarService) injector.getInstance(CarService.class);
    private final ManufacturerService manufacturerService =
            (ManufacturerService) injector.getInstance(ManufacturerService.class);
    private final DriverService driverService =
            (DriverService) injector.getInstance(DriverService.class);

    @Override
    protected void doGet(HttpServletRequest req,
            HttpServletResponse resp) throws ServletException, IOException {
        req.getRequestDispatcher("/WEB-INF/views/createCar.jsp").forward(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req,
            HttpServletResponse resp) throws ServletException, IOException {
        String model = req.getParameter("model");
        Long manufacturerId = Long.valueOf(req.getParameter("manufacturer_id"));

        Manufacturer manufacturer = manufacturerService.get(manufacturerId);
        Car newCar = new Car();
        newCar.setModel(model);
        newCar.setManufacturer(manufacturer);
        carService.create(newCar);
        resp.sendRedirect(req.getContextPath() + Properties.INDEX_PAGE);
    }
}