Add crud-methods in Film-class. Add test code for crud-operations i Main-class

Co-authored-by: Mattias Barth mattias.barth@gmail.com

Author: Linnea Vardal

src/main/java/Director.java

@@ -20,8 +20,6 @@ public class Director {
     @Column(nullable = true)
     private Integer yearOfDeath;
 
-
-
     public Set<Film> getFilms() {
         return films;
     }
@@ -70,7 +68,6 @@ public Long getId() {
         return id;
     }
 
-
 }
 
 

src/main/java/Film.java

@@ -1,5 +1,7 @@
 import jakarta.persistence.*;
 
+import java.util.List;
+
 @Entity
 public class Film {
     @Id
@@ -35,5 +37,25 @@ public Long getId() {
         return id;
     }
 
+    //Lägg till en ny film
+    public static void addFilm(EntityManager em, String title, Director director) {
+        Film film = new Film();
+        film.setTitle(title);
+        film.setDirector(director);
+        em.persist(film);
+        System.out.println("Film tillagd: " + title);
+    }
+    //Hämta alla filmer
+    public static List<Film> getAllFilms(EntityManager em) {
+        return em.createQuery("FROM Film", Film.class).getResultList();
+    }
+
+    //Hämta filmer regisserade av en viss regissör
+    public static List<Film> getFilmsByDirector(EntityManager em, Director director) {
+        return em.createQuery("FROM Film f WHERE f.director = :director", Film.class)
+            .setParameter("director", director)
+            .getResultList();
+    }
+
 
 }

src/main/java/Main.java

@@ -21,18 +21,39 @@ public static void main(String[] args) {
                 .managedClasses(Film.class, Director.class);
             try (EntityManagerFactory emf = cfg.createEntityManagerFactory()) {
                 emf.runInTransaction(em -> {
+                    //Skapa regissör för test
+                    Director director = new Director();
+                    director.setName("Christopher Bolan");
+                    director.setCountry("United States");
+                    director.setBirthYear(1970);
+                    em.persist(director);
+
+                    //Testa att lägga till filmer
+                    Film.addFilm(em, "The Dirk Knight", director);
+                    Film.addFilm(em, "Inception", director);
+
+                    //Testa att hämta alla filmer
+                    System.out.println("\nAlla filmer:");
+                    List<Film> films = Film.getAllFilms(em);
+                    films.forEach(film -> System.out.println(film.getTitle()));
+
+                    //Testa att hämta filmer av en viss regissör
+                    System.out.println("\nAlla filmer av regissör:");
+                    List<Film> filmsByDirector = Film.getFilmsByDirector(em, director);
+                    filmsByDirector.forEach(film -> System.out.println(film.getTitle()));
+
                     //If no Films in database, add some
-                    if (em.createQuery("select count(o) from Film o", Long.class)
-                        .getSingleResult() == 0) {
-                        Film film1 = new Film();
-                        em.persist(film1);
-                        em.flush();
-                        Film film2 = new Film();
-                        em.persist(film2);
-                    }
-                    System.out.println("==== Using select query, N + 1 ====");
-                    em.createQuery("from Film", Film.class)
-                        .getResultList().forEach(System.out::println);
+//                    if (em.createQuery("select count(o) from Film o", Long.class)
+//                        .getSingleResult() == 0) {
+//                        Film film1 = new Film();
+//                        em.persist(film1);
+//                        em.flush();
+//                        Film film2 = new Film();
+//                        em.persist(film2);
+//                    }
+//                    System.out.println("==== Using select query, N + 1 ====");
+//                    em.createQuery("from Film", Film.class)
+//                        .getResultList().forEach(System.out::println);
 
                 });