From 6d54383ca919b50eb7211a07327b0fa94297c261 Mon Sep 17 00:00:00 2001
From: Vlad Mihalcea <mihalcea.vlad@gmail.com>
Date: Tue, 17 Apr 2018 10:02:28 +0300
Subject: [PATCH] HHH-12407 - order_inserts: StackOverflowError when flushing a
 session

Add test that proves the issue does not replicate anymore
---
 ...eringWithBaseClassReferencingSubclass.java | 113 ++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 hibernate-core/src/test/java/org/hibernate/test/insertordering/InsertOrderingWithBaseClassReferencingSubclass.java

diff --git a/hibernate-core/src/test/java/org/hibernate/test/insertordering/InsertOrderingWithBaseClassReferencingSubclass.java b/hibernate-core/src/test/java/org/hibernate/test/insertordering/InsertOrderingWithBaseClassReferencingSubclass.java
new file mode 100644
index 0000000000..1b6b5b9c36
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/test/insertordering/InsertOrderingWithBaseClassReferencingSubclass.java
@@ -0,0 +1,113 @@
+/*
+ * 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.insertordering;
+
+import java.sql.SQLException;
+import java.util.Map;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Inheritance;
+import javax.persistence.InheritanceType;
+import javax.persistence.ManyToOne;
+
+import org.hibernate.cfg.Environment;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
+import org.hibernate.test.util.jdbc.PreparedStatementSpyConnectionProvider;
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+
+/**
+ * @author Vlad Mihalcea
+ */
+@TestForIssue(jiraKey = "HHH-12407")
+public class InsertOrderingWithBaseClassReferencingSubclass
+		extends BaseNonConfigCoreFunctionalTestCase {
+
+	@Override
+	protected Class[] getAnnotatedClasses() {
+		return new Class[] {
+				OwningTable.class,
+				TableB.class,
+				TableA.class,
+				LinkTable.class
+		};
+	}
+
+	@Override
+	protected void addSettings(Map settings) {
+		settings.put( Environment.ORDER_INSERTS, "true" );
+		settings.put( Environment.STATEMENT_BATCH_SIZE, "10" );
+	}
+
+	@Test
+	public void testBatching() throws SQLException {
+		doInHibernate( this::sessionFactory, session -> {
+			OwningTable rec_owningTable = new OwningTable();
+			session.persist(rec_owningTable);
+
+			session.flush();
+
+			TableB rec_tableB = new TableB();
+			rec_tableB.owning = rec_owningTable;
+			session.persist(rec_tableB);
+
+			TableA rec_tableA = new TableA();
+			rec_tableA.owning = rec_owningTable;
+			session.persist(rec_tableA);
+
+			LinkTable rec_link = new LinkTable();
+			rec_link.refToA = rec_tableA;
+			rec_link.refToB = rec_tableB;
+
+			session.persist(rec_link);
+		} );
+
+	}
+
+	@Entity(name = "RootTable")
+	@Inheritance(strategy = InheritanceType.JOINED)
+	public abstract static class RootTable {
+		@Id
+		@GeneratedValue
+		public int sysId;
+	}
+
+	@Entity(name = "OwnedTable")
+	public abstract static class OwnedTable extends RootTable {
+		@ManyToOne
+		public OwningTable owning;
+	}
+
+	@Entity(name = "OwningTable")
+	public static class OwningTable extends OwnedTable {
+	}
+
+	@Entity(name = "TableA")
+	public static class TableA extends OwnedTable {
+	}
+
+	@Entity
+	public static class TableB extends OwnedTable {
+	}
+
+	@Entity(name = "LinkTable")
+	public static class LinkTable {
+		@Id
+		@GeneratedValue
+		public int sysId;
+
+		@ManyToOne
+		public TableA refToA;
+
+		@ManyToOne
+		public TableB refToB;
+	}
+}