Image repositroy abstract class update

src/main/java/NTNU/IDATT1002/repository/ImageRepository.java

@@ -16,49 +16,19 @@ import java.util.List;
  * @see NTNU.IDATT1002.repository.Repository
  */
 
-public class ImageRepository implements Repository<Image, Long> {
+public class ImageRepository extends GenericRepository<Image, Long> {
 
   private EntityManager entityManager;
 
   /**
    * Constructor to inject {@link EntityManager} dependency.
    *
-   * @param entityManager the entity manager to utilize.
+   * @param entityManager the entity manager to utilize
    */
-
   public ImageRepository(EntityManager entityManager) {
-    this.entityManager = entityManager;
+    super(entityManager);
   }
 
-  /**
-   * Saves a given image and returns the saved instance.
-   *
-   * @param image the image album to save
-   * @return the saved image
-   */
-
-  public Optional<Image> save(Image image) {
-    try {
-      persist(image);
-      return Optional.of(image);
-    } catch (Exception e) {
-      e.printStackTrace();
-    }
-
-    return Optional.empty();
-  }
-
-  /**
-   * Persists the given image
-   *
-   * @param image the image to persist
-   */
-
-  private void persist(Image image) {
-    entityManager.getTransaction().begin();
-    entityManager.persist(image);
-    entityManager.getTransaction().commit();
-  }
 
   /**
    * Retrieves all instances of the type image.
@@ -69,66 +39,6 @@ public class ImageRepository implements Repository<Image, Long> {
     return Optional.empty();
   }
 
-  /**
-   * Retrieves all instances of type image.
-   *
-   * @return all saved image
-   */
-
-  public List<Image> findAll() {
-    return entityManager.createQuery("from Image").getResultList();
-  }
-
-
-  /**
-   * Retrieves an image with the given id.
-   *
-   * @param id the if of the image to find
-   * @return the entity with the given id if found, else Optional.empty()
-   */
-
-  public Optional<Image> findById(Long id) {
-    Image image = entityManager.find(Image.class, id);
-    return image != null ? Optional.of(image) : Optional.empty();
-  }
-
-  /**
-   * Deletes the given image
-   *
-   * @param image the image to delete
-   */
-
-  public void delete(Image image) {
-    try {
-      entityManager.getTransaction().begin();
-      entityManager.remove(image);
-      entityManager.getTransaction().commit();
-    } catch (Exception e) {
-      e.printStackTrace();
-    }
-  }
-
-  /**
-   * Deletes an image with the given id.
-   *
-   * @param id the id of the image to delete
-   */
-
-  public void deleteById(Long id) {
-    Optional<Image> image = findById(id);
-    image.ifPresent(this::delete);
-
-  }
-
-  /**
-   * Return the number of images
-   *
-   * @return the number of images
-   */
-
-  public long count() {
-    return findAll().size();
-  }
 
   /**
    * Return whether the given image exists.
@@ -137,7 +47,7 @@ public class ImageRepository implements Repository<Image, Long> {
    * @return true if the image album exist, else false
    */
 
-  @Override
+
   public boolean exists(Image image) {
     return findById(image.getImageID()).isPresent();
   }