HHH-4726 - Add support for delete-orphan cascading to <one-to-one/>

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@18573 1b8cb986-b30d-0410-93ca-fae66ebed9b2

core/src/main/java/org/hibernate/cfg/HbmBinder.java

@@ -1101,6 +1101,16 @@ public final class HbmBinder {
 					simpleValue.addFormula( formula );
 				}
 			}
+
+			// todo : another GoodThing would be to go back after all parsing and see if all the columns
+			// (and no formulas) are contained in a defined unique key that only contains these columns.
+			// That too would mark this as a logical one-to-one
+			final Attribute uniqueAttribute = node.attribute( "unique" );
+			if ( uniqueAttribute != null
+					&& "true".equals( uniqueAttribute.getValue() )
+					&& ManyToOne.class.isInstance( simpleValue ) ) {
+				( (ManyToOne) simpleValue ).markAsLogicalOneToOne();
+			}
 		}
 		else {
 			if ( node.elementIterator( "column" ).hasNext() ) {

testsuite/src/test/java/org/hibernate/test/orphan/one2one/fk/composite/DeleteOneToOneOrphansTest.java

@@ -0,0 +1,92 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2010, 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.one2one.fk.composite;
+
+import java.util.List;
+
+import org.hibernate.Session;
+import org.hibernate.junit.functional.FunctionalTestCase;
+
+/**
+ * TODO : javadoc
+ *
+ * @author Steve Ebersole
+ */
+public class DeleteOneToOneOrphansTest extends FunctionalTestCase {
+	public DeleteOneToOneOrphansTest(String string) {
+		super( string );
+	}
+
+	public String[] getMappings() {
+		return new String[] { "orphan/one2one/fk/composite/Mapping.hbm.xml" };
+	}
+
+	private void createData() {
+		Session session = openSession();
+		session.beginTransaction();
+		Employee emp = new Employee();
+		emp.setInfo( new EmployeeInfo( 1L, 1L) );
+		session.save( emp );
+		session.getTransaction().commit();
+		session.close();
+	}
+
+	private void cleanupData() {
+		Session session = openSession();
+		session.beginTransaction();
+		session.createQuery( "delete EmployeeInfo" ).executeUpdate();
+		session.createQuery( "delete Employee" ).executeUpdate();
+		session.getTransaction().commit();
+		session.close();
+	}
+
+	public void testOrphanedWhileManaged() {
+		createData();
+
+		Session session = openSession();
+		session.beginTransaction();
+		List results = session.createQuery( "from EmployeeInfo" ).list();
+		assertEquals( 1, results.size() );
+		results = session.createQuery( "from Employee" ).list();
+		assertEquals( 1, results.size() );
+		Employee emp = ( Employee ) results.get( 0 );
+		assertNotNull( emp.getInfo() );
+		emp.setInfo( null );
+		session.getTransaction().commit();
+		session.close();
+
+		session = openSession();
+		session.beginTransaction();
+		emp = ( Employee ) session.get( Employee.class, emp.getId() );
+		assertNull( emp.getInfo() );
+		results = session.createQuery( "from EmployeeInfo" ).list();
+		assertEquals( 0, results.size() );
+		results = session.createQuery( "from Employee" ).list();
+		assertEquals( 1, results.size() );
+		session.getTransaction().commit();
+		session.close();
+
+		cleanupData();
+	}
+}

testsuite/src/test/java/org/hibernate/test/orphan/one2one/fk/composite/Employee.java

@@ -0,0 +1,50 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2010, 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.one2one.fk.composite;
+
+/**
+ * TODO : javadoc
+ *
+ * @author Steve Ebersole
+ */
+public class Employee {
+	private Long id;
+	private EmployeeInfo info;
+
+	public Long getId() {
+		return id;
+	}
+
+	public void setId(Long id) {
+		this.id = id;
+	}
+
+	public EmployeeInfo getInfo() {
+		return info;
+	}
+
+	public void setInfo(EmployeeInfo info) {
+		this.info = info;
+	}
+}

testsuite/src/test/java/org/hibernate/test/orphan/one2one/fk/composite/EmployeeInfo.java

@@ -0,0 +1,106 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2010, 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.one2one.fk.composite;
+
+import java.io.Serializable;
+
+/**
+ * TODO : javadoc
+ *
+ * @author Steve Ebersole
+ */
+public class EmployeeInfo {
+	public static class Id implements Serializable {
+		private Long companyId;
+		private Long personId;
+
+		public Id() {
+		}
+
+		public Id(Long companyId, Long personId) {
+			this.companyId = companyId;
+			this.personId = personId;
+		}
+
+		public Long getCompanyId() {
+			return companyId;
+		}
+
+		public void setCompanyId(Long companyId) {
+			this.companyId = companyId;
+		}
+
+		public Long getPersonId() {
+			return personId;
+		}
+
+		public void setPersonId(Long personId) {
+			this.personId = personId;
+		}
+
+		@Override
+		public boolean equals(Object o) {
+			if ( this == o ) {
+				return true;
+			}
+			if ( o == null || getClass() != o.getClass() ) {
+				return false;
+			}
+
+			Id id = (Id) o;
+
+			return companyId.equals( id.companyId )
+					&& personId.equals( id.personId );
+
+		}
+
+		@Override
+		public int hashCode() {
+			int result = companyId.hashCode();
+			result = 31 * result + personId.hashCode();
+			return result;
+		}
+	}
+
+	private Id id;
+
+	public EmployeeInfo() {
+	}
+
+	public EmployeeInfo(Long companyId, Long personId) {
+		this( new Id( companyId, personId ) );
+	}
+
+	public EmployeeInfo(Id id) {
+		this.id = id;
+	}
+
+	public Id getId() {
+		return id;
+	}
+
+	public void setId(Id id) {
+		this.id = id;
+	}
+}

testsuite/src/test/java/org/hibernate/test/orphan/one2one/fk/composite/Mapping.hbm.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Hibernate, Relational Persistence for Idiomatic Java
+  ~
+  ~ Copyright (c) 2010, 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
+  -->
+
+<!DOCTYPE hibernate-mapping PUBLIC
+        '-//Hibernate/Hibernate Mapping DTD 3.0//EN'
+        'http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd'>
+
+<hibernate-mapping package="org.hibernate.test.orphan.one2one.fk.composite" >
+
+    <class name="Employee">
+        <id name="id" type="long" column="id">
+            <generator class="increment" />
+        </id>
+         <many-to-one name="info" unique="true" cascade="all,delete-orphan">
+            <column name="COMP_ID" />
+            <column name="PERS_ID" />
+         </many-to-one>
+    </class>
+
+    <class name="EmployeeInfo">
+        <composite-id class="EmployeeInfo$Id" name="id">
+            <key-property name="companyId" column="COMP_ID" />
+            <key-property name="personId" column="PERS_ID" />
+        </composite-id>
+    </class>
+
+</hibernate-mapping>