HHH-16378 Reproducer for failure to resolve target type of association defined in mappersuperclass with generics

hibernate-core/src/test/java/org/hibernate/orm/test/association/GenericAssociationTest.java

@@ -0,0 +1,105 @@
+package org.hibernate.orm.test.association;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+import javax.persistence.OneToOne;
+
+@TestForIssue(jiraKey = "HHH-16378")
+public class GenericAssociationTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {
+				Parent.class,
+				AbstractChild.class,
+				Child.class
+		};
+	}
+
+	@Test
+	public void testFindByParentId() {
+		inTransaction( session -> {
+			Parent parent = new Parent( 1L );
+			Child child = new Child( 2L );
+			child.setParent( parent );
+			session.persist( parent );
+			session.persist( child );
+		} );
+
+		inTransaction( session -> {
+			assertThat( session.createQuery( "from Child where parent.id = :parentId", Child.class )
+					.setParameter( "parentId", 1L )
+					.list() )
+					.containsExactly( session.getReference( Child.class, 2L ) );
+		} );
+	}
+
+	@Entity(name = "Parent")
+	public static class Parent {
+		@Id
+		private Long id;
+
+		public Parent() {
+		}
+
+		public Parent(Long id) {
+			this.id = id;
+		}
+
+		public Long getId() {
+			return this.id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+	}
+
+	@MappedSuperclass
+	public abstract static class AbstractChild<T> {
+		@OneToOne(optional = false)
+		private T parent;
+
+		public AbstractChild() {
+		}
+
+		public abstract Long getId();
+
+		public T getParent() {
+			return this.parent;
+		}
+
+		public void setParent(T parent) {
+			this.parent = parent;
+		}
+	}
+
+	@Entity(name = "Child")
+	public static class Child extends AbstractChild<Parent> {
+		@Id
+		protected Long id;
+
+		public Child() {
+		}
+
+		public Child(Long id) {
+			this.id = id;
+		}
+
+		@Override
+		public Long getId() {
+			return this.id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+	}
+}