Wydzielenie interfejsu repository

PC30-SklepSpring/src/main/java/sklep/repository/ProductRepository.java

@@ -3,27 +3,12 @@ package sklep.repository;
 import java.util.List;
 import java.util.Optional;
 
-import javax.persistence.EntityManager;
-import javax.persistence.TypedQuery;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Repository;
-
 import sklep.model.Product;
 
-@Repository
-public class ProductRepository {
-	@Autowired
-	private EntityManager em;
+public interface ProductRepository {
 
-	public List<Product> findAll() {
-		TypedQuery<Product> query = em.createNamedQuery("Product.findAll", Product.class);
-		return query.getResultList();
-	}
+	List<Product> findAll();
 
-	public Optional<Product> findById(int productId) {
-		Product product = em.find(Product.class, productId);
-		return Optional.ofNullable(product);
-	}
+	Optional<Product> findById(int productId);
 
 }
\ No newline at end of file

PC30-SklepSpring/src/main/java/sklep/repository/ProductRepositoryImpl.java

+package sklep.repository;
+
+import java.util.List;
+import java.util.Optional;
+
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import sklep.model.Product;
+
+@Repository
+public class ProductRepositoryImpl implements ProductRepository {
+	@Autowired
+	private EntityManager em;
+	
+	@Override
+	public List<Product> findAll() {
+		TypedQuery<Product> query = em.createNamedQuery("Product.findAll", Product.class);
+		return query.getResultList();
+	}
+	
+	@Override
+	public Optional<Product> findById(int productId) {
+		Product product = em.find(Product.class, productId);
+		return Optional.ofNullable(product);
+	}
+
+}