HHH-8749 Error flushing with a many-to-many Map defined with

unique="true" and cascading orphan delete

hibernate-core/src/main/java/org/hibernate/engine/spi/EntityEntry.java

@@ -282,7 +282,7 @@ public final class EntityEntry implements Serializable {
 	}
 
 	public Object getLoadedValue(String propertyName) {
-		if ( loadedState == null ) {
+		if ( loadedState == null || propertyName == null ) {
 			return null;
 		}
 		else {

hibernate-core/src/test/java/org/hibernate/test/orphan/manytomany/Group.java

@@ -0,0 +1,54 @@
+package org.hibernate.test.orphan.manytomany;
+
+import java.io.Serializable;
+
+public class Group implements Serializable {
+
+	private String org;
+	
+	private String name;
+	
+	private String description;
+	
+	private Integer groupType;
+
+	public Group(String name, String org) {
+		this.org = org;
+		this.name = name;
+	}
+
+	public Group() {
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getOrg() {
+		return org;
+	}
+
+	public void setOrg(String org) {
+		this.org = org;
+	}
+
+	public String getDescription() {
+		return description;
+	}
+
+	public void setDescription(String description) {
+		this.description = description;
+	}
+
+	public Integer getGroupType() {
+		return groupType;
+	}
+
+	public void setGroupType(Integer groupType) {
+		this.groupType = groupType;
+	}
+}

hibernate-core/src/test/java/org/hibernate/test/orphan/manytomany/ManyToManyOrphanTest.java

@@ -0,0 +1,98 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2006-2011, 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.orphan.manytomany;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.List;
+
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+public class ManyToManyOrphanTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected String[] getMappings() {
+		return new String[] { "orphan/manytomany/UserGroup.hbm.xml" };
+	}
+
+	@Test
+	@TestForIssue(jiraKey = "HHH-8749")
+	public void testManyToManyWithCascadeDeleteOrphan() {
+		Session s = openSession();
+		Transaction t = s.beginTransaction();
+		User bob = new User( "bob", "jboss" );
+		Group seam = new Group( "seam", "jboss" );
+		seam.setGroupType( 1 );
+		Group hb = new Group( "hibernate", "jboss" );
+		hb.setGroupType( 2 );
+		bob.getGroups().put( seam.getGroupType(), seam );
+		bob.getGroups().put( hb.getGroupType(), hb );
+		s.persist( bob );
+		s.persist( seam );
+		s.persist( hb );
+		t.commit();
+		s.close();
+
+		s = openSession();
+		t = s.beginTransaction();
+		bob = (User) s.get( User.class, "bob" );
+		assertEquals( 2, bob.getGroups().size() );
+		seam = (Group) s.get( Group.class, "seam" );
+		assertEquals( (Integer) 1, seam.getGroupType() );
+		hb = (Group) s.get( Group.class, "hibernate" );
+		assertEquals( (Integer) 2, hb.getGroupType() );
+		t.commit();
+		s.close();
+
+		s = openSession();
+		t = s.beginTransaction();
+		bob = (User) s.get( User.class, "bob" );
+		assertEquals( 2, bob.getGroups().size() );
+		hb = (Group) s.get( Group.class, "hibernate" );
+		bob.getGroups().remove( hb.getGroupType() );
+		assertEquals( 1, bob.getGroups().size() );
+		t.commit();
+		s.close();
+
+		s = openSession();
+		t = s.beginTransaction();
+		bob = (User) s.get( User.class, "bob" );
+		assertEquals( 1, bob.getGroups().size() );
+		t.commit();
+		s.close();
+
+		// Verify orphan group was deleted
+		s = openSession();
+		t = s.beginTransaction();
+		List<Group> groups = s.createCriteria( Group.class ).list();
+		assertEquals( 1, groups.size() );
+		assertEquals( "seam", groups.get( 0 ).getName() );
+		t.commit();
+		s.close();
+	}
+}

hibernate-core/src/test/java/org/hibernate/test/orphan/manytomany/User.java

@@ -0,0 +1,47 @@
+package org.hibernate.test.orphan.manytomany;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+public class User implements Serializable {
+
+	private String org;
+
+	private String name;
+
+	private Map<Integer, Group> groups = new HashMap<Integer, Group>();
+
+	public User(String name, String org) {
+		this.org = org;
+		this.name = name;
+	}
+
+	public User() {
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getOrg() {
+		return org;
+	}
+
+	public void setOrg(String org) {
+		this.org = org;
+	}
+
+	public Map<Integer, Group> getGroups() {
+		return groups;
+	}
+
+	public void setGroups(Map<Integer, Group> groups) {
+		this.groups = groups;
+	}
+
+}

hibernate-core/src/test/java/org/hibernate/test/orphan/manytomany/UserGroup.hbm.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<!DOCTYPE hibernate-mapping PUBLIC 
+	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+
+<hibernate-mapping package="org.hibernate.test.orphan.manytomany">
+
+	<class name="User" table="`User`">
+		<id name="name" length="32" />
+		<map name="groups" table="UserGroup" cascade="all,delete-orphan">
+			<key column="name" />
+			<map-key column="groupType" type="integer" />
+			<many-to-many class="Group" unique="true">
+				<column name="groupName" />
+			</many-to-many>
+		</map>
+	</class>
+
+	<class name="Group" table="`Group`">
+		<id name="name" length="32" />
+		<property name="description" />
+		<property name="groupType" type="integer" />
+	</class>
+
+</hibernate-mapping>