HHH-18933 Test case adapted from reproducer mentioned in https://hibernate.atlassian.net/browse/HHH-18933 - showing the issue has been resolved

Author: cigaly

hibernate-core/src/test/java/org/hibernate/orm/test/inheritance/HierarchyOrderTest.java

@@ -0,0 +1,193 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.inheritance;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityManagerFactory;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Inheritance;
+import jakarta.persistence.InheritanceType;
+import jakarta.persistence.TypedQuery;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DomainModel(
+		annotatedClasses = {
+				HierarchyOrderTest.DerOA.class,
+				HierarchyOrderTest.DerDA.class,
+				HierarchyOrderTest.DerDB.class,
+				HierarchyOrderTest.DerOB.class,
+				HierarchyOrderTest.BaseD.class,
+				HierarchyOrderTest.BaseO.class
+		}
+)
+@SessionFactory
+class HierarchyOrderTest {
+
+	private EntityManagerFactory emf;
+	private DerOA deroa;
+	private DerOB derob;
+
+	@BeforeEach
+	void setUp() {
+		DerDB derba1 = new DerDB( 5 );
+		DerDA derda1 = new DerDA( "1", "abase" );
+		deroa = new DerOA( derda1 );
+		derob = new DerOB( derba1 );
+//		emf = buildEntityManagerFactory();
+	}
+
+	@Test
+	void testBaseProperty(SessionFactoryScope scope) {
+		scope.inSession( em -> {
+			em.getTransaction().begin();
+			em.persist( deroa );
+			em.persist( derob );
+			em.getTransaction().commit();
+			Integer ida = deroa.getId();
+			Integer idb = derob.getId();
+			em.clear();
+			TypedQuery<DerOA> qa = em.createQuery( "select o from DerOA o where o.id =:id", DerOA.class );
+			qa.setParameter( "id", ida );
+			DerOA deroain = qa.getSingleResult();
+			assertEquals( "abase", deroain.derda.baseprop );
+		} );
+	}
+
+	@Test
+	void testDerivedProperty(SessionFactoryScope scope) {
+		scope.inSession( em -> {
+			em.getTransaction().begin();
+			em.persist( deroa );
+			em.persist( derob );
+			em.getTransaction().commit();
+			Integer idb = derob.getId();
+			em.clear();
+
+			TypedQuery<DerOB> qb = em.createQuery( "select o from DerOB o where o.id =:id", DerOB.class );
+			qb.setParameter( "id", idb );
+			DerOB derobin = qb.getSingleResult();
+			assertNotNull( derobin );
+			assertEquals( 5, derobin.derdb().b );
+		} );
+	}
+
+	/*
+	 * Created on 03/12/2024 by Paul Harrison ([email protected]).
+	 */
+	@Entity(name = "DerOA")
+	public static class DerOA extends BaseO {
+		public DerOA(DerDA derda) {
+			this.derda = derda;
+		}
+
+		@Embedded
+		//   @AttributeOverrides({
+		//         @AttributeOverride(name="a",column = @Column(name = "da"))
+		//   })
+		public BaseD derda;
+
+		public DerOA() {
+
+		}
+	}
+
+	/*
+	 * Created on 03/12/2024 by Paul Harrison ([email protected]).
+	 */
+	@Embeddable
+	public static class DerDB extends BaseD {
+		public DerDB(int b) {
+			this.b = b;
+		}
+
+		public int b;
+
+		public DerDB() {
+
+		}
+	}
+
+	/*
+	 * Created on 03/12/2024 by Paul Harrison ([email protected]).
+	 */
+	@Embeddable
+	public static class DerDA extends BaseD {
+		public DerDA(String a, String bprop) {
+			super( bprop );
+			this.a = a;
+		}
+
+		public String a;
+
+		public DerDA() {
+
+		}
+	}
+
+	/*
+	 * Created on 03/12/2024 by Paul Harrison ([email protected]).
+	 */
+	@Embeddable
+	public abstract static class BaseD { //TODO would really like this to be abstract
+		public String baseprop;
+
+		public BaseD(String baseprop) {
+			this.baseprop = baseprop;
+		}
+
+		public BaseD() {
+
+		}
+
+		public String getBaseprop() {
+			return baseprop;
+		}
+
+	}
+
+	@Entity(name = "BaseO")
+	@Inheritance(strategy = InheritanceType.JOINED)
+	public abstract static class BaseO {
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		public Integer getId() {
+			return id;
+		}
+	}
+
+	/*
+	 * Created on 03/12/2024 by Paul Harrison ([email protected]).
+	 */
+	@Entity(name = "DerOB")
+	public static class DerOB extends BaseO {
+		public DerOB(DerDB derdb) {
+			this.derdb = derdb;
+		}
+
+		@Embedded
+		BaseD derdb;
+
+		public DerOB() {
+
+		}
+
+		public DerDB derdb() {
+			return (DerDB) derdb;
+		}
+	}
+}