From 249f847acd91a4ac4244628c349247b8617ce014 Mon Sep 17 00:00:00 2001
From: Christian Beikov <christian.beikov@gmail.com>
Date: Fri, 2 Mar 2018 01:11:43 +0100
Subject: [PATCH] HHH-12332 - Testcase for reproducing NPE in
 AbstractPropertyMapping.getSuperCollection

---
 .../MappedSuperclassExtendsEntityTest.java    | 136 ++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 hibernate-core/src/test/java/org/hibernate/test/inheritance/discriminator/MappedSuperclassExtendsEntityTest.java

diff --git a/hibernate-core/src/test/java/org/hibernate/test/inheritance/discriminator/MappedSuperclassExtendsEntityTest.java b/hibernate-core/src/test/java/org/hibernate/test/inheritance/discriminator/MappedSuperclassExtendsEntityTest.java
new file mode 100644
index 0000000000..0b8ae7c71b
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/test/inheritance/discriminator/MappedSuperclassExtendsEntityTest.java
@@ -0,0 +1,136 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2014, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.test.inheritance.discriminator;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import javax.persistence.*;
+import java.io.Serializable;
+import java.util.List;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+
+/**
+ * Originally from https://github.com/mkaletka/hibernate-test-case-templates/commit/2b3c075cacd07474d5565fa3bd5a6d0a48683dc0
+ *
+ * @author Christian Beikov
+ */
+public class MappedSuperclassExtendsEntityTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {
+				TestEntity.class,
+				GrandParent.class,
+				Parent.class,
+				Child1.class,
+				Child2.class
+		};
+	}
+
+	@Test
+	@TestForIssue(jiraKey = "HHH-12332")
+	public void testQueryingSingle() {
+		doInHibernate( this::sessionFactory, s -> {
+			s.createQuery( "from TestEntity p" ).getResultList();
+		} );
+	}
+
+	@Entity(name = "GrandParent")
+	@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+	@DiscriminatorColumn(name = "discriminator")
+	public static abstract class GrandParent implements Serializable {
+		private static final long serialVersionUID = 1L;
+
+        @Id
+        @GeneratedValue
+		private Long id;
+
+		public GrandParent() {
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+	}
+
+	@MappedSuperclass
+	public static abstract class Parent extends GrandParent {
+
+		@ManyToMany(mappedBy = "parents")
+		private List<TestEntity> entities;
+
+		public List<TestEntity> getEntities() {
+			return entities;
+		}
+
+		public void setEntities(List<TestEntity> entities) {
+			this.entities = entities;
+		}
+
+	}
+
+	@Entity(name = "TestEntity")
+	public static class TestEntity {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+		@ManyToMany
+		private List<GrandParent> parents;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public List<GrandParent> getParents() {
+			return parents;
+		}
+
+		public void setParents(List<GrandParent> parents) {
+			this.parents = parents;
+		}
+
+	}
+
+	@Entity(name = "Child1")
+	@DiscriminatorValue("CHILD1")
+	public static class Child1 extends Parent {
+	}
+
+	@Entity(name = "Child2")
+	@DiscriminatorValue("CHILD2")
+	public static class Child2 extends Parent {
+	}
+}