BAEL-6651: Embeddable Records in Hibernate 6 (#14516)

* BAEL-6651: Bumped Spring Boot version

* BAEL-6651: Replaced flaky test

* BAEL-6651: Embeddable example with tests

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/recordswithjpa/QueryService.java

@@ -27,14 +27,15 @@ public class QueryService {
         return entityManager.createQuery(query).getResultList();
     }
 
-    public BookRecord findBookById(Long id) {
+    public BookRecord findBookByTitle(String title) {
         TypedQuery<BookRecord> query = entityManager
-          .createQuery("SELECT new com.baeldung.recordswithjpa.records.BookRecord(b.id, b.title, b.author, b.isbn) " +
-                  "FROM Book b WHERE b.id = :id", BookRecord.class);
-        query.setParameter("id", id);
+            .createQuery("SELECT new com.baeldung.recordswithjpa.records.BookRecord(b.id, b.title, b.author, b.isbn) " +
+                         "FROM Book b WHERE b.title = :title", BookRecord.class);
+        query.setParameter("title", title);
         return query.getSingleResult();
     }
 
+
     public List<BookRecord> findAllBooksUsingMapping() {
         Query query = entityManager.createNativeQuery("SELECT * FROM book", "BookRecordMapping");
         return query.getResultList();

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/recordswithjpa/embeddable/Author.java

@@ -0,0 +1,9 @@
+package com.baeldung.recordswithjpa.embeddable;
+
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+public record Author(
+    String firstName,
+    String lastName
+) {}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/recordswithjpa/embeddable/AuthorInstallator.java

@@ -0,0 +1,23 @@
+package com.baeldung.recordswithjpa.embeddable;
+
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.metamodel.spi.EmbeddableInstantiator;
+import org.hibernate.metamodel.spi.ValueAccess;
+
+public class AuthorInstallator implements EmbeddableInstantiator {
+
+    public boolean isInstance(Object object, SessionFactoryImplementor sessionFactory) {
+        return object instanceof Author;
+    }
+
+    public boolean isSameClass(Object object, SessionFactoryImplementor sessionFactory) {
+        return object.getClass().equals(Author.class);
+    }
+
+    @Override
+    public Object instantiate(final ValueAccess valueAccess, final SessionFactoryImplementor sessionFactoryImplementor) {
+        final String firstName = valueAccess.getValue(0, String.class);
+        final String secondName = valueAccess.getValue(1, String.class);
+        return new Author(firstName, secondName);
+    }
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/recordswithjpa/embeddable/EmbeddableBook.java

@@ -0,0 +1,65 @@
+package com.baeldung.recordswithjpa.embeddable;
+
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.EmbeddableInstantiator;
+
+@Entity
+@Table(name = "embeadable_author_book")
+public class EmbeddableBook {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String title;
+    @Embedded
+    @EmbeddableInstantiator(AuthorInstallator.class)
+    private Author author;
+    private String isbn;
+
+    public EmbeddableBook() {
+    }
+
+    public EmbeddableBook(Long id, String title, Author author, String isbn) {
+        this.id = id;
+        this.title = title;
+        this.author = author;
+        this.isbn = isbn;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public Author getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(Author author) {
+        this.author = author;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/recordswithjpa/repository/EmbeddableBookRepository.java

@@ -0,0 +1,14 @@
+package com.baeldung.recordswithjpa.repository;
+
+import com.baeldung.recordswithjpa.embeddable.EmbeddableBook;
+import com.baeldung.recordswithjpa.embeddable.Author;
+import java.util.List;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+
+public interface EmbeddableBookRepository extends CrudRepository<EmbeddableBook, Long> {
+    @Query("SELECT b FROM EmbeddableBook b WHERE b.author = :author")
+    List<EmbeddableBook> findBookByAuthor(@Param("author") Author author);
+
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/recordswithjpa/QueryServiceIntegrationTest.java

@@ -1,13 +1,8 @@
 package com.baeldung.recordswithjpa;
 
-import com.baeldung.recordswithjpa.entity.Book;
 import com.baeldung.recordswithjpa.records.BookRecord;
-import com.baeldung.recordswithjpa.repository.BookRepository;
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
 
 import java.util.List;
 
@@ -27,8 +22,8 @@ public class QueryServiceIntegrationTest extends RecordsAsJpaIntegrationTest {
 
     @Test
     void findBookById() {
-        BookRecord bookById = queryService.findBookById(1L);
-        assertEquals("The Lord of the Rings", bookById.title());
+        BookRecord bookByTitle = queryService.findBookByTitle("The Lord of the Rings");
+        assertNotNull(bookByTitle);
     }
 
     @Test

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/recordswithjpa/RecordsAsJpaEmbeddableIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.recordswithjpa;
+
+import com.baeldung.recordswithjpa.embeddable.Author;
+import com.baeldung.recordswithjpa.embeddable.EmbeddableBook;
+import com.baeldung.recordswithjpa.repository.EmbeddableBookRepository;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+public class RecordsAsJpaEmbeddableIntegrationTest {
+    @Autowired
+    protected EmbeddableBookRepository bookRepository;
+
+    @BeforeEach
+    void setUp() {
+
+        Author author = new Author("J.R.R.", "Tolkien");
+        EmbeddableBook book1 = new EmbeddableBook(null, "The Lord of the Rings", author, "978-0544003415");
+        EmbeddableBook book2 = new EmbeddableBook(null, "The Hobbit", author, "978-0547928227");
+
+        bookRepository.save(book1);
+        bookRepository.save(book2);
+    }
+
+    @AfterEach
+    void tearDown() {
+        bookRepository.deleteAll();
+    }
+}

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/recordswithjpa/repository/EmbeddableBookRepositoryIntegrationTest.java

@@ -0,0 +1,16 @@
+package com.baeldung.recordswithjpa.repository;
+
+import com.baeldung.recordswithjpa.RecordsAsJpaEmbeddableIntegrationTest;
+import com.baeldung.recordswithjpa.embeddable.Author;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class EmbeddableBookRepositoryIntegrationTest extends RecordsAsJpaEmbeddableIntegrationTest {
+
+    @Test
+    void findBookByAuthor() {
+        assertEquals(2, bookRepository.findBookByAuthor(new Author("J.R.R.", "Tolkien")).size());
+    }
+
+}