JAVA INTERNAL

//Local.java
@Local
public interface MovieBeansLocal {

    void addmovie(String moviename, Collection<Integer> tids);

    Collection<Movie> getallmovies();

    Movie getMovieById(Integer id);

    void deletemoviebyid(Integer id);

    Collection<Theater> getalltheaters();

    Collection<Theater> getalltheatersbymovie(Integer id);

    Collection<Movie> getallmoviesbytheater(Integer id);
}

//Beans.java

@Stateless
public class MovieBeans implements MovieBeansLocal {

    @PersistenceContext(unitName = "my_persistence_unit")
    EntityManager em;

    @Override
    public void addmovie(String moviename, Collection<Integer> tids) {
        Movie m = new Movie();
        m.setName(moviename);
        em.persist(m);
        Collection<Theater> t = new ArrayList<>();
        for (Integer q : tids) {
            Theater o = em.find(Theater.class, q);

            if (o != null) {
                Collection<Movie> s = o.getMovieCollection();
                s.add(m);

                t.add(o);
                m.setTheaterCollection(t);
                o.setMovieCollection(s);
                em.merge(o);
            }
        }
    }

    @Override
    public Collection<Movie> getallmovies() {
        return em.createNamedQuery("Movie.findAll").getResultList();
    }

    @Override
    public void deletemoviebyid(Integer id) {
        Movie m = em.find(Movie.class, id);
        Collection<Theater> theater = m.getTheaterCollection();
        for (Theater t : theater) {
            if (t != null) {
                Collection<Movie> d = t.getMovieCollection();
                d.remove(m);
                t.setMovieCollection(d);
            }
        }
        em.remove(m);
    }

    @Override
    public Collection<Theater> getalltheaters() {
        return em.createNamedQuery("Theater.findAll").getResultList();
    }

    @Override
    public Collection<Theater> getalltheatersbymovie(Integer id) {
        Movie m = em.find(Movie.class, id);
        return m.getTheaterCollection();
    }

    @Override
    public Collection<Movie> getallmoviesbytheater(Integer id) {
        Theater t = em.find(Theater.class, id);
        return t.getMovieCollection();
    }

    @Override
    public Movie getMovieById(Integer id) {
        return em.find(Movie.class, id);
    }
}


//List-Servlet.java

@WebServlet(name = "MovieServlet", urlPatterns = {"/MovieServlet"})
public class MovieServlet extends HttpServlet {

    @EJB
    MovieBeansLocal mbl;

    Collection<Movie> movies = new ArrayList<>();
    Collection<Theater> theaters = new ArrayList<>();


    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet MovieServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet MovieServlet at " + request.getContextPath() + "</h1>");
            out.println("<a href='AddServlet'>Add Servlet</a>");
            out.println("<table border='1'><tr><td>Moviename</td><td>Theaters</td><td>City</td><td>State</td><td>location</td><td>TO Delete</td></tr>");
            movies = mbl.getallmovies();
            for (Movie k : movies) {
                out.println("<tr>");
                out.println("<td>" + k.getName() + "</td>");
                theaters = mbl.getalltheatersbymovie(k.getId());
                Theater temp = new Theater();
                out.println("<td><ui>");
                for (Theater t : theaters) {
                    out.println("<li>" + t.getName() + "</li>");
                    temp = t;
                }
                out.println("</ui></td>");
                out.println("<td>" + temp.getState() + "</td>");
                out.println("<td>" + temp.getLocation() + "</td>");
                out.println("<td>" + temp.getCity() + "</td>");
                out.println("<td><a href='EditMovieServlet?id=" + k.getId() + "'>Edit Movie</a></td>");
                out.println("<td><a href='MovieServlet?delid=" + k.getId() + "'>Delete Movie</a></td>");
                out.println("</tr>");
            }
            out.println("</table>");
            out.println("</body>");
            out.println("</html>");
        }
    }


    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String del_id = request.getParameter("delid");
        if (del_id != null) {
            mbl.deletemoviebyid(Integer.parseInt(del_id));
            response.sendRedirect("MovieServlet");
        } else {
            processRequest(request, response);
        }
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }

}


//Add-Servlet.java

@WebServlet(name = "AddServlet", urlPatterns = {"/AddServlet"})
public class AddServlet extends HttpServlet {

    @EJB
    MovieBeansLocal mbl;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet AddServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet AddServlet at " + request.getContextPath() + "</h1>");
            out.println("<form action=\"AddServlet\" method=\"POST\">\n"
                    + "<input type=\"text\" name=\"name\" value=\"\" />\n"
                    + "<input type=\"checkbox\" name=\"theater\" value=\"1\" checked=\"checked\" />Rupam\n"
                    + "<input type=\"checkbox\" name=\"theater\" value=\"2\" />Rajhans\n"
                    + "<input type=\"checkbox\" name=\"theater\" value=\"3\" />PVR\n"
                    + "<input type=\"checkbox\" name=\"theater\" value=\"4\" />INOR\n"
                    + "<input type=\"submit\" value=\"add\" />"
                    + "</form>\n");
            out.println("</body>");
            out.println("</html>");
        }
    }
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String moviename = request.getParameter("name");
        if (moviename != null) {
            String[] s = request.getParameterValues("theater");
            Collection<Integer> c = new ArrayList<>();
            for (String p : s) {
                Integer a = Integer.parseInt(p);
                c.add(a);
            }

            mbl.addmovie(moviename, c);
        }
        response.sendRedirect("MovieServlet");
    }
    @Override
    public String getServletInfo() {
        return "Short description";
    }
}