HHH-19195 Test case using classes described in https://in.relation.to/2024/07/12/embeddable-inheritance/

Author: cigaly

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Animal.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+import jakarta.persistence.DiscriminatorColumn;
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+@DiscriminatorColumn(name = "animal_type", length = 1)
+public class Animal {
+	private int age;
+
+	private String name;
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Cat.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+public class Cat extends Mammal {
+	// [...]
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Dog.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+public class Dog extends Mammal {
+	// [...]
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/EmbeddableInheritanceTest.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+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.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DomainModel(
+		annotatedClasses = {
+				Animal.class,
+				Cat.class,
+				Dog.class,
+				Fish.class,
+				Mammal.class,
+				Owner.class
+		}
+)
+@SessionFactory
+public class EmbeddableInheritanceTest {
+
+	@Test
+	void testCatByMother(SessionFactoryScope scope) {
+		final List<Owner> owners = scope.fromSession(
+				session ->
+						session.createQuery( "select o from Owner o where treat(o.pet as Cat).mother = :mother",
+										Owner.class )
+								.setParameter( "mother", "Chloe" )
+								.getResultList() );
+		assertNotNull( owners );
+	}
+
+	@Test
+	void testCatMothers(SessionFactoryScope scope) {
+		final List<String> owners = scope.fromSession(
+				session ->
+						session.createNamedQuery( "catMothers", String.class )
+								.getResultList() );
+		assertNotNull( owners );
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Fish.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+public class Fish extends Animal {
+	private int fins;
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Mammal.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+import jakarta.persistence.Embeddable;
+
+@Embeddable
+public class Mammal extends Animal {
+	private String mother;
+}

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/discriminatorvalues/Owner.java

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+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.embeddable.discriminatorvalues;
+
+
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.NamedQuery;
+
+@Entity
+@NamedQuery(name = "catMothers", query = "select treat(o.pet as Cat).mother from Owner o")
+public class Owner {
+	@Id
+	private Long id;
+
+	@Embedded
+	private Animal pet;
+}