HHH-14499 Add test for issue

Author: dreab8

hibernate-core/src/test/java/org/hibernate/test/mapping/MappedSuperclassWithGenericsTest.java

@@ -0,0 +1,90 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.test.mapping;
+
+import java.io.Serializable;
+import java.util.Objects;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.IdClass;
+import javax.persistence.MappedSuperclass;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+@TestForIssue(jiraKey = "HHH-14499")
+public class MappedSuperclassWithGenericsTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {
+				IntermediateAbstractMapped.class,
+				BaseEntity.class,
+				AbstractGenericMappedSuperType.class,
+		};
+	}
+
+	@Test
+	public void testIt() {
+
+	}
+
+	@MappedSuperclass
+	public static abstract class AbstractGenericMappedSuperType<T> {
+
+		private T whateverType;
+
+	}
+
+	@MappedSuperclass
+	@IdClass(PK.class)
+	public static abstract class IntermediateAbstractMapped<T> extends AbstractGenericMappedSuperType<T> {
+
+		@Id
+		private String keyOne;
+		@Id
+		private String keyTwo;
+		@Id
+		private String keyThree;
+	}
+
+	@SuppressWarnings("UnusedDeclaration")
+	public static class PK implements Serializable {
+
+		private String keyOne;
+		private String keyTwo;
+		private String keyThree;
+
+		@Override
+		public boolean equals(Object o) {
+			if ( this == o ) {
+				return true;
+			}
+			if ( o == null || getClass() != o.getClass() ) {
+				return false;
+			}
+			PK pk = (PK) o;
+			return Objects.equals( keyOne, pk.keyOne ) &&
+					Objects.equals( keyTwo, pk.keyTwo ) &&
+					Objects.equals( keyThree, pk.keyThree );
+		}
+
+		@Override
+		public int hashCode() {
+			return Objects.hash( keyOne, keyTwo, keyThree );
+		}
+	}
+
+	@Entity(name = "BaseEntity")
+	public static class BaseEntity<T> extends IntermediateAbstractMapped<byte[]> {
+
+		String aString;
+
+	}
+
+}