one-to-one

raemdop · **Joined:** Sat Dec 16, 2006 6:19 pm **Posts:** 3

Hi,

Who can help me with this one-to-one relation. I can not get it to work. An employee is composition of a Person(POJO) and a mailaddress(String). When I create a new employee and want save it to the DB thru hibernate, I can not get it to work.

Thanks for reading my problem

Pieter

mySQL DB script

Code:

DROP TABLE IF EXISTS `person`;
CREATE TABLE `person` (
  `uid` int(10) unsigned NOT NULL default '0',
  `firstname` varchar(50) NOT NULL default '',
  PRIMARY KEY  (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

DROP TABLE IF EXISTS `employee`;
CREATE TABLE `employee` (
  `personid` int(10) unsigned NOT NULL default '0',
  `mailAddress` varchar(45) NOT NULL default '',
  PRIMARY KEY  (`personid`),
  CONSTRAINT `FK_employee_1` FOREIGN KEY (`personid`) REFERENCES `person` (`uid`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

mapping files:
Employee.hbm.xml

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cvo.test">
   <class name="Employee" table="employee" lazy="false">
      <id name="person" column="personid" type="cvo.test.Person">
         <generator class="foreign">
            <param name="property">person</param>
            <param name="table">person</param>
            <param name="column">uid</param>
         </generator>
      </id>
      <property name="mailAddress" column="mailAddress"/>
      <one-to-one name="person" class="Person" cascade="all">
      </one-to-one>
   </class>
</hibernate-mapping>

Person.hbm.xml

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cvo.test">
   <class name="Person" table="person" lazy="false">
      <id name="uid" column="uid" type="java.lang.Integer">
         <generator class="assigned"/>
      </id>
      <property name="firstname" column="firstname"/>
   </class>
</hibernate-mapping>

hibernate.cfg.xml

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
   <session-factory>
      <property name="connection.driver_class">
    com.mysql.jdbc.Driver
  </property>
      <property name="connection.url">
     jdbc:mysql://localhost/hibtest
  </property>
      <property name="dialect">
     org.hibernate.dialect.MySQLDialect
  </property>
      <property name="connection.username">root</property>
      <property name="connection.password">root</property>
      <property name="show_sql">true</property>
      <mapping resource="Person.hbm.xml"/>
      <mapping resource="Employee.hbm.xml"/>
   </session-factory>
</hibernate-configuration>

log4j.properties

Code:

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}: - %m%n
### set log levels - for more verbose logging 
### change 'info' to 'debug‘
log4j.rootLogger=debug, stdout
log4j.logger.net.sf.hibernate=warn

HibernateUtil.java

Code:

package cvo.test;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
   private static String CFG_FILE = "/hibernate.cfg.xml";

   private static final ThreadLocal tl = new ThreadLocal();

   private static final Configuration cfg = new Configuration();

   private static SessionFactory factory;

   private HibernateUtil() {
   }

   public static Session currentSession() throws HibernateException {

      Session session = (Session) tl.get();
      if (session == null) {
         if (factory == null) {
            try {
               cfg.configure(CFG_FILE);
               factory = cfg.buildSessionFactory();
            } catch (Exception e) {
               System.err.println("Error Creating SessionFactory");
               e.printStackTrace();
            }
         }
         session = factory.openSession();
         tl.set(session);
      }
      return session;
   }

   public static void closeSession() throws HibernateException {

      Session session = (Session) tl.get();
      tl.set(null);

      if (session != null) {
         session.close();
      }

   }

}

Employee.java

Code:

package cvo.test;

import java.io.Serializable;

public class Employee implements Serializable {

   
   private static final long serialVersionUID = 1L;

   private Person person;

   private String mailAddress;

   public Employee() {
      super();
   }

   public Employee(Person person, String mailAddress) {
      super();
      this.person = person;
      this.mailAddress = mailAddress;
   }
   
   public Employee(Integer id, String firstname, String mailAddress) {
      super();
      this.person = new Person(id, firstname);
      this.mailAddress = mailAddress;
   }

   public String getMailAddress() {
      return mailAddress;
   }

   public void setMailAddress(String mailAddress) {
      this.mailAddress = mailAddress;
   }

   public Person getPerson() {
      return person;
   }

   public void setPerson(Person person) {
      this.person = person;
   }

   public String toString() {
      StringBuffer buffer = new StringBuffer();
      buffer.append("[Employee:");
      buffer.append(" person: ");
      buffer.append(person);
      buffer.append(" mailAddress: ");
      buffer.append(mailAddress);
      buffer.append("]");
      return buffer.toString();
   }

   public boolean equals(Object o) {
      if (this == o) {
         return true;
      }
      if (o == null) {
         return false;
      }
      if (o.getClass() != getClass()) {
         return false;
      }
      Employee castedObj = (Employee) o;
      return ((this.person == null ? castedObj.person == null : this.person
            .equals(castedObj.person)) && (this.mailAddress == null ? castedObj.mailAddress == null
            : this.mailAddress.equals(castedObj.mailAddress)));
   }

}

Person.java

Code:

package cvo.test;

import java.io.Serializable;

public class Person implements Serializable {


   private static final long serialVersionUID = 1L;

   private Integer uid;

   private String firstname;

   public Person() {
   }

   public Person(Integer uid, String firstname) {
      super();
      this.uid = uid;
      this.firstname = firstname;
   }

   public String getFirstname() {
      return firstname;
   }

   public void setFirstname(String firstname) {
      this.firstname = firstname;
   }

   public Integer getUid() {
      return uid;
   }

   public void setUid(Integer uid) {
      this.uid = uid;
   }

   public String toString() {
      StringBuffer buffer = new StringBuffer();
      buffer.append("[Person:");
      buffer.append(" uid: ");
      buffer.append(uid);
      buffer.append(" firstname: ");
      buffer.append(firstname);
      buffer.append("]");
      return buffer.toString();
   }

   public boolean equals(Object o) {
      if (this == o) {
         return true;
      }
      if (o == null) {
         return false;
      }
      if (o.getClass() != getClass()) {
         return false;
      }
      Person castedObj = (Person) o;
      return ((this.uid == null ? castedObj.uid == null : this.uid
            .equals(castedObj.uid)) && (this.firstname == null ? castedObj.firstname == null
            : this.firstname.equals(castedObj.firstname)));
   }

}

Main.java

Code:

package cvo.test;

import org.hibernate.Session;
import org.hibernate.Transaction;


public class Main {

   /**
    * @param args
    */
   public static void main(String[] args) {
      
      Session session = (Session) HibernateUtil.currentSession();
      
      Person person = new Person(10, "pieter");
      Employee employee = new Employee(person, "pieter.raemdonck@pfizer.com");
      Transaction trans = session.beginTransaction();
      session.saveOrUpdate(employee);
      trans.commit();
      trans = null;
      


   }

}

batmat · **Posted:** Tue Dec 19, 2006 5:13 am

What is your error...

raemdop · **Joined:** Sat Dec 16, 2006 6:19 pm **Posts:** 3

here is the console output

Code:

44:21,769  INFO Environment: - Hibernate 3.2.1
44:21,779  INFO Environment: - hibernate.properties not found
44:21,779  INFO Environment: - Bytecode provider name : cglib
44:21,799  INFO Environment: - using JDK 1.4 java.sql.Timestamp handling
44:21,919  INFO Configuration: - configuring from resource: /hibernate.cfg.xml
44:21,919  INFO Configuration: - Configuration resource: /hibernate.cfg.xml
44:22,059 DEBUG DTDEntityResolver: - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd]
44:22,600 DEBUG DTDEntityResolver: - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
44:22,600 DEBUG DTDEntityResolver: - located [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd] in classpath
44:22,640 DEBUG Configuration: - connection.driver_class=com.mysql.jdbc.Driver
44:22,640 DEBUG Configuration: - connection.url=jdbc:mysql://localhost/hibtest
44:22,640 DEBUG Configuration: - dialect=org.hibernate.dialect.MySQLDialect
44:22,640 DEBUG Configuration: - connection.username=root
44:22,650 DEBUG Configuration: - connection.password=root
44:22,650 DEBUG Configuration: - show_sql=true
44:22,650 DEBUG Configuration: - null<-org.dom4j.tree.DefaultAttribute@15663a2 [Attribute: name resource value "Person.hbm.xml"]
44:22,650  INFO Configuration: - Reading mappings from resource : Person.hbm.xml
44:22,650 DEBUG DTDEntityResolver: - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd]
44:22,650 DEBUG DTDEntityResolver: - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
44:22,660 DEBUG DTDEntityResolver: - located [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd] in classpath
44:22,810  INFO HbmBinder: - Mapping class: cvo.test.Person -> person
44:22,820 DEBUG HbmBinder: - Mapped property: uid -> uid
44:22,840 DEBUG HbmBinder: - Mapped property: firstname -> firstname
44:22,840 DEBUG Configuration: - null<-org.dom4j.tree.DefaultAttribute@176e552 [Attribute: name resource value "Employee.hbm.xml"]
44:22,840  INFO Configuration: - Reading mappings from resource : Employee.hbm.xml
44:22,840 DEBUG DTDEntityResolver: - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd]
44:22,840 DEBUG DTDEntityResolver: - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
44:22,840 DEBUG DTDEntityResolver: - located [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd] in classpath
44:22,870  INFO HbmBinder: - Mapping class: cvo.test.Employee -> employee
44:22,870 DEBUG HbmBinder: - Mapped property: person -> personid
44:22,880 DEBUG HbmBinder: - Mapped property: mailAddress -> mailAddress
44:22,890 DEBUG HbmBinder: - Mapped property: person
44:22,890  INFO Configuration: - Configured SessionFactory: null
44:22,890 DEBUG Configuration: - properties: {hibernate.connection.password=root, java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, sun.boot.library.path=C:\app\jdk1.5.0_02\jre\bin, java.vm.version=1.5.0_02-b09, hibernate.connection.username=root, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=;, java.vm.name=Java HotSpot(TM) Client VM, file.encoding.pkg=sun.io, user.country=US, sun.os.patch.level=Service Pack 2, java.vm.specification.name=Java Virtual Machine Specification, user.dir=C:\data\java5\examen\examenOneToOneTest, java.runtime.version=1.5.0_02-b09, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, java.endorsed.dirs=C:\app\jdk1.5.0_02\jre\lib\endorsed, os.arch=x86, java.io.tmpdir=C:\DOCUME~1\RaemdoP\LOCALS~1\Temp\, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., user.variant=, os.name=Windows XP, sun.jnu.encoding=Cp1252, java.library.path=C:\app\jdk1.5.0_02\bin;.;C:\WINNT\system32;C:\WINNT;C:\Program Files\ThinkPad\Utilities;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\Program Files\Support Tools\;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\ATI Technologies\ATI Control Panel;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\Common Files\Ulead Systems\MPEG;C:\Program Files\Microsoft SQL Server\80\Tools\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\binn\;C:\Program Files\Microsoft SQL Server\90\DTS\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\, java.specification.name=Java Platform API Specification, java.class.version=49.0, sun.management.compiler=HotSpot Client Compiler, os.version=5.1, connection.password=root, user.home=C:\Documents and Settings\RaemdoP, user.timezone=Europe/Paris, connection.username=root, java.awt.printerjob=sun.awt.windows.WPrinterJob, file.encoding=Cp1252, java.specification.version=1.5, hibernate.connection.driver_class=com.mysql.jdbc.Driver, show_sql=true, user.name=RaemdoP, java.class.path=C:\data\java5\examen\examenOneToOneTest\bin;C:\data\java5\examen\examenOneToOneTest\lib\antlr-2.7.6.jar;C:\data\java5\examen\examenOneToOneTest\lib\asm.jar;C:\data\java5\examen\examenOneToOneTest\lib\asm-attrs.jar;C:\data\java5\examen\examenOneToOneTest\lib\cglib-2.1.3.jar;C:\data\java5\examen\examenOneToOneTest\lib\commons-collections-2.1.1.jar;C:\data\java5\examen\examenOneToOneTest\lib\commons-logging-1.0.4.jar;C:\data\java5\examen\examenOneToOneTest\lib\concurrent-1.3.2.jar;C:\data\java5\examen\examenOneToOneTest\lib\dom4j-1.6.1.jar;C:\data\java5\examen\examenOneToOneTest\lib\ehcache-1.2.3.jar;C:\data\java5\examen\examenOneToOneTest\lib\hibernate3.jar;C:\data\java5\examen\examenOneToOneTest\lib\jta.jar;C:\data\java5\examen\examenOneToOneTest\lib\log4j-1.2.11.jar;C:\data\java5\examen\examenOneToOneTest\lib\mysql-connector-java-3.1.10-bin.jar, hibernate.bytecode.use_reflection_optimizer=false, hibernate.show_sql=true, java.vm.specification.version=1.0, java.home=C:\app\jdk1.5.0_02\jre, sun.arch.data.model=32, hibernate.dialect=org.hibernate.dialect.MySQLDialect, hibernate.connection.url=jdbc:mysql://localhost/hibtest, user.language=en, java.specification.vendor=Sun Microsystems Inc., awt.toolkit=sun.awt.windows.WToolkit, java.vm.info=mixed mode, java.version=1.5.0_02, java.ext.dirs=C:\app\jdk1.5.0_02\jre\lib\ext, sun.boot.class.path=C:\app\jdk1.5.0_02\jre\lib\rt.jar;C:\app\jdk1.5.0_02\jre\lib\i18n.jar;C:\app\jdk1.5.0_02\jre\lib\sunrsasign.jar;C:\app\jdk1.5.0_02\jre\lib\jsse.jar;C:\app\jdk1.5.0_02\jre\lib\jce.jar;C:\app\jdk1.5.0_02\jre\lib\charsets.jar;C:\app\jdk1.5.0_02\jre\classes, java.vendor=Sun Microsystems Inc., connection.driver_class=com.mysql.jdbc.Driver, file.separator=\, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, sun.io.unicode.encoding=UnicodeLittle, sun.cpu.endian=little, sun.desktop=windows, connection.url=jdbc:mysql://localhost/hibtest, dialect=org.hibernate.dialect.MySQLDialect, sun.cpu.isalist=pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86}
44:22,890 DEBUG Configuration: - Preparing to build session factory with filters : {}
44:22,890 DEBUG Configuration: - processing extends queue
44:22,890 DEBUG Configuration: - processing collection mappings
44:22,890 DEBUG Configuration: - processing native query and ResultSetMapping mappings
44:22,890 DEBUG Configuration: - processing association property references
44:22,890 DEBUG Configuration: - processing foreign key constraints
44:23,020  INFO DriverManagerConnectionProvider: - Using Hibernate built-in connection pool (not for production use!)
44:23,020  INFO DriverManagerConnectionProvider: - Hibernate connection pool size: 20
44:23,020  INFO DriverManagerConnectionProvider: - autocommit mode: false
44:23,061  INFO DriverManagerConnectionProvider: - using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://localhost/hibtest
44:23,061  INFO DriverManagerConnectionProvider: - connection properties: {user=root, password=root}
44:23,061 DEBUG DriverManagerConnectionProvider: - total checked-out connections: 0
44:23,061 DEBUG DriverManagerConnectionProvider: - opening new JDBC connection
44:23,561 DEBUG DriverManagerConnectionProvider: - created connection to: jdbc:mysql://localhost/hibtest, Isolation Level: 4
44:23,561  INFO SettingsFactory: - RDBMS: MySQL, version: 4.1.13a-nt
44:23,561  INFO SettingsFactory: - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-3.1.10 ( $Date: 2005/05/19 15:52:23 $, $Revision: 1.1.2.2 $ )
44:23,561 DEBUG DriverManagerConnectionProvider: - returning connection to pool, pool size: 1
44:23,581  INFO Dialect: - Using dialect: org.hibernate.dialect.MySQLDialect
44:23,591  INFO TransactionFactoryFactory: - Using default transaction strategy (direct JDBC transactions)
44:23,591  INFO TransactionManagerLookupFactory: - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
44:23,591  INFO SettingsFactory: - Automatic flush during beforeCompletion(): disabled
44:23,591  INFO SettingsFactory: - Automatic session close at end of transaction: disabled
44:23,591  INFO SettingsFactory: - JDBC batch size: 15
44:23,591  INFO SettingsFactory: - JDBC batch updates for versioned data: disabled
44:23,591  INFO SettingsFactory: - Scrollable result sets: enabled
44:23,591 DEBUG SettingsFactory: - Wrap result sets: disabled
44:23,591  INFO SettingsFactory: - JDBC3 getGeneratedKeys(): enabled
44:23,591  INFO SettingsFactory: - Connection release mode: auto
44:23,591  INFO SettingsFactory: - Maximum outer join fetch depth: 2
44:23,591  INFO SettingsFactory: - Default batch fetch size: 1
44:23,591  INFO SettingsFactory: - Generate SQL with comments: disabled
44:23,591  INFO SettingsFactory: - Order SQL updates by primary key: disabled
44:23,591  INFO SettingsFactory: - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
44:23,601  INFO ASTQueryTranslatorFactory: - Using ASTQueryTranslatorFactory
44:23,601  INFO SettingsFactory: - Query language substitutions: {}
44:23,601  INFO SettingsFactory: - JPA-QL strict compliance: disabled
44:23,601  INFO SettingsFactory: - Second-level cache: enabled
44:23,601  INFO SettingsFactory: - Query cache: disabled
44:23,601  INFO SettingsFactory: - Cache provider: org.hibernate.cache.NoCacheProvider
44:23,601  INFO SettingsFactory: - Optimize cache for minimal puts: disabled
44:23,601  INFO SettingsFactory: - Structured second-level cache entries: disabled
44:23,601 DEBUG SQLExceptionConverterFactory: - Using dialect defined converter
44:23,601  INFO SettingsFactory: - Echoing all SQL to stdout
44:23,601  INFO SettingsFactory: - Statistics: disabled
44:23,601  INFO SettingsFactory: - Deleted entity synthetic identifier rollback: disabled
44:23,601  INFO SettingsFactory: - Default entity-mode: pojo
44:23,631  INFO SessionFactoryImpl: - building session factory
44:23,631 DEBUG SessionFactoryImpl: - Session factory constructed with filter configurations : {}
44:23,631 DEBUG SessionFactoryImpl: - instantiating session factory with properties: {java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, hibernate.connection.password=root, sun.boot.library.path=C:\app\jdk1.5.0_02\jre\bin, java.vm.version=1.5.0_02-b09, hibernate.connection.username=root, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=;, java.vm.name=Java HotSpot(TM) Client VM, file.encoding.pkg=sun.io, user.country=US, sun.os.patch.level=Service Pack 2, java.vm.specification.name=Java Virtual Machine Specification, user.dir=C:\data\java5\examen\examenOneToOneTest, java.runtime.version=1.5.0_02-b09, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, java.endorsed.dirs=C:\app\jdk1.5.0_02\jre\lib\endorsed, os.arch=x86, java.io.tmpdir=C:\DOCUME~1\RaemdoP\LOCALS~1\Temp\, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., user.variant=, os.name=Windows XP, sun.jnu.encoding=Cp1252, java.library.path=C:\app\jdk1.5.0_02\bin;.;C:\WINNT\system32;C:\WINNT;C:\Program Files\ThinkPad\Utilities;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\Program Files\Support Tools\;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\ATI Technologies\ATI Control Panel;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\Intel\Wireless\Bin\;C:\Program Files\Common Files\Ulead Systems\MPEG;C:\Program Files\Microsoft SQL Server\80\Tools\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\binn\;C:\Program Files\Microsoft SQL Server\90\DTS\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\, java.specification.name=Java Platform API Specification, java.class.version=49.0, sun.management.compiler=HotSpot Client Compiler, os.version=5.1, user.home=C:\Documents and Settings\RaemdoP, connection.password=root, user.timezone=Europe/Paris, java.awt.printerjob=sun.awt.windows.WPrinterJob, connection.username=root, java.specification.version=1.5, file.encoding=Cp1252, hibernate.connection.driver_class=com.mysql.jdbc.Driver, show_sql=true, java.class.path=C:\data\java5\examen\examenOneToOneTest\bin;C:\data\java5\examen\examenOneToOneTest\lib\antlr-2.7.6.jar;C:\data\java5\examen\examenOneToOneTest\lib\asm.jar;C:\data\java5\examen\examenOneToOneTest\lib\asm-attrs.jar;C:\data\java5\examen\examenOneToOneTest\lib\cglib-2.1.3.jar;C:\data\java5\examen\examenOneToOneTest\lib\commons-collections-2.1.1.jar;C:\data\java5\examen\examenOneToOneTest\lib\commons-logging-1.0.4.jar;C:\data\java5\examen\examenOneToOneTest\lib\concurrent-1.3.2.jar;C:\data\java5\examen\examenOneToOneTest\lib\dom4j-1.6.1.jar;C:\data\java5\examen\examenOneToOneTest\lib\ehcache-1.2.3.jar;C:\data\java5\examen\examenOneToOneTest\lib\hibernate3.jar;C:\data\java5\examen\examenOneToOneTest\lib\jta.jar;C:\data\java5\examen\examenOneToOneTest\lib\log4j-1.2.11.jar;C:\data\java5\examen\examenOneToOneTest\lib\mysql-connector-java-3.1.10-bin.jar, user.name=RaemdoP, hibernate.bytecode.use_reflection_optimizer=false, hibernate.show_sql=true, java.vm.specification.version=1.0, sun.arch.data.model=32, java.home=C:\app\jdk1.5.0_02\jre, hibernate.connection.url=jdbc:mysql://localhost/hibtest, hibernate.dialect=org.hibernate.dialect.MySQLDialect, java.specification.vendor=Sun Microsystems Inc., user.language=en, awt.toolkit=sun.awt.windows.WToolkit, java.vm.info=mixed mode, java.version=1.5.0_02, java.ext.dirs=C:\app\jdk1.5.0_02\jre\lib\ext, sun.boot.class.path=C:\app\jdk1.5.0_02\jre\lib\rt.jar;C:\app\jdk1.5.0_02\jre\lib\i18n.jar;C:\app\jdk1.5.0_02\jre\lib\sunrsasign.jar;C:\app\jdk1.5.0_02\jre\lib\jsse.jar;C:\app\jdk1.5.0_02\jre\lib\jce.jar;C:\app\jdk1.5.0_02\jre\lib\charsets.jar;C:\app\jdk1.5.0_02\jre\classes, java.vendor=Sun Microsystems Inc., file.separator=\, connection.driver_class=com.mysql.jdbc.Driver, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, sun.cpu.endian=little, sun.io.unicode.encoding=UnicodeLittle, sun.desktop=windows, connection.url=jdbc:mysql://localhost/hibtest, sun.cpu.isalist=pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86, dialect=org.hibernate.dialect.MySQLDialect}
44:23,762 DEBUG AbstractEntityPersister: - Static SQL for entity: cvo.test.Person
44:23,762 DEBUG AbstractEntityPersister: -  Version select: select uid from person where uid =?
44:23,762 DEBUG AbstractEntityPersister: -  Snapshot select: select person_.uid, person_.firstname as firstname0_ from person person_ where person_.uid=?
44:23,762 DEBUG AbstractEntityPersister: -  Insert 0: insert into person (firstname, uid) values (?, ?)
44:23,762 DEBUG AbstractEntityPersister: -  Update 0: update person set firstname=? where uid=?
44:23,762 DEBUG AbstractEntityPersister: -  Delete 0: delete from person where uid=?
44:23,762 DEBUG AbstractEntityPersister: - Static SQL for entity: cvo.test.Employee
44:23,762 DEBUG AbstractEntityPersister: -  Version select: select personid from employee where personid =?
44:23,762 DEBUG AbstractEntityPersister: -  Snapshot select: select employee_.personid, employee_.mailAddress as mailAddr2_1_ from employee employee_ where employee_.personid=?
44:23,762 DEBUG AbstractEntityPersister: -  Insert 0: insert into employee (mailAddress, personid) values (?, ?)
44:23,762 DEBUG AbstractEntityPersister: -  Update 0: update employee set mailAddress=? where personid=?
44:23,762 DEBUG AbstractEntityPersister: -  Delete 0: delete from employee where personid=?
44:23,782 DEBUG EntityLoader: - Static select for entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=?
44:23,782 DEBUG EntityLoader: - Static select for entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=?
44:23,892 DEBUG EntityLoader: - Static select for entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=? for update
44:23,892 DEBUG EntityLoader: - Static select for entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=? for update
44:23,892 DEBUG EntityLoader: - Static select for entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=? for update
44:23,902 DEBUG EntityLoader: - Static select for action ACTION_MERGE on entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=?
44:23,902 DEBUG EntityLoader: - Static select for action ACTION_REFRESH on entity cvo.test.Person: select person0_.uid as uid0_0_, person0_.firstname as firstname0_0_ from person person0_ where person0_.uid=?
44:23,902 DEBUG EntityLoader: - Static select for entity cvo.test.Employee: select employee0_.personid as personid1_1_, employee0_.mailAddress as mailAddr2_1_1_, person1_.uid as uid0_0_, person1_.firstname as firstname0_0_ from employee employee0_ left outer join person person1_ on employee0_.personid=person1_.uid where employee0_.personid=?
44:23,902 DEBUG EntityLoader: - Static select for entity cvo.test.Employee: select employee0_.personid as personid1_1_, employee0_.mailAddress as mailAddr2_1_1_, person1_.uid as uid0_0_, person1_.firstname as firstname0_0_ from employee employee0_ left outer join person person1_ on employee0_.personid=person1_.uid where employee0_.personid=?
44:23,902 DEBUG EntityLoader: - Static select for entity cvo.test.Employee: select employee0_.personid as personid1_0_, employee0_.mailAddress as mailAddr2_1_0_ from employee employee0_ where employee0_.personid=? for update
44:23,902 DEBUG EntityLoader: - Static select for entity cvo.test.Employee: select employee0_.personid as personid1_0_, employee0_.mailAddress as mailAddr2_1_0_ from employee employee0_ where employee0_.personid=? for update
44:23,902 DEBUG EntityLoader: - Static select for entity cvo.test.Employee: select employee0_.personid as personid1_0_, employee0_.mailAddress as mailAddr2_1_0_ from employee employee0_ where employee0_.personid=? for update
44:23,902 DEBUG EntityLoader: - Static select for action ACTION_MERGE on entity cvo.test.Employee: select employee0_.personid as personid1_1_, employee0_.mailAddress as mailAddr2_1_1_, person1_.uid as uid0_0_, person1_.firstname as firstname0_0_ from employee employee0_ left outer join person person1_ on employee0_.personid=person1_.uid where employee0_.personid=?
44:23,902 DEBUG EntityLoader: - Static select for action ACTION_REFRESH on entity cvo.test.Employee: select employee0_.personid as personid1_1_, employee0_.mailAddress as mailAddr2_1_1_, person1_.uid as uid0_0_, person1_.firstname as firstname0_0_ from employee employee0_ left outer join person person1_ on employee0_.personid=person1_.uid where employee0_.personid=?
44:23,902 DEBUG SessionFactoryObjectFactory: - initializing class SessionFactoryObjectFactory
44:23,902 DEBUG SessionFactoryObjectFactory: - registered: 4028fbf70f9bd067010f9bd0685e0000 (unnamed)
44:23,902  INFO SessionFactoryObjectFactory: - Not binding factory to JNDI, no JNDI name configured
44:23,902 DEBUG SessionFactoryImpl: - instantiated session factory
44:23,902 DEBUG SessionFactoryImpl: - Checking 0 named HQL queries
44:23,902 DEBUG SessionFactoryImpl: - Checking 0 named SQL queries
44:24,002 DEBUG SessionImpl: - opened session at timestamp: 11665502639
44:24,002 DEBUG JDBCTransaction: - begin
44:24,002 DEBUG ConnectionManager: - opening JDBC connection
44:24,002 DEBUG DriverManagerConnectionProvider: - total checked-out connections: 0
44:24,012 DEBUG DriverManagerConnectionProvider: - using pooled JDBC connection, pool size: 0
44:24,012 DEBUG JDBCTransaction: - current autocommit status: false
44:24,012 DEBUG JDBCContext: - after transaction begin
44:24,012 DEBUG IdentifierValue: - id unsaved-value: null
44:24,012 DEBUG AbstractSaveEventListener: - detached instance of: cvo.test.Employee
44:24,012 DEBUG DefaultSaveOrUpdateEventListener: - updating detached instance
44:24,012 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,032 DEBUG DefaultSaveOrUpdateEventListener: - updating [cvo.test.Employee#2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a]
44:24,042 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,042 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,042 DEBUG DefaultSaveOrUpdateEventListener: - updating [cvo.test.Employee#2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a]
44:24,052 DEBUG Cascade: - processing cascade ACTION_SAVE_UPDATE for: cvo.test.Employee
44:24,052 DEBUG CascadingAction: - cascading to saveOrUpdate: cvo.test.Person
44:24,052 DEBUG IdentifierValue: - id unsaved-value strategy UNDEFINED
44:24,052 DEBUG AbstractEntityPersister: - Getting current persistent state for: [cvo.test.Person#10]
44:24,052 DEBUG AbstractBatcher: - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
44:24,052 DEBUG SQL: - select person_.uid, person_.firstname as firstname0_ from person person_ where person_.uid=?
Hibernate: select person_.uid, person_.firstname as firstname0_ from person person_ where person_.uid=?
44:24,052 DEBUG AbstractBatcher: - preparing statement
44:24,142 DEBUG IntegerType: - binding '10' to parameter: 1
44:24,152 DEBUG AbstractBatcher: - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
44:24,152 DEBUG AbstractBatcher: - closing statement
44:24,152 DEBUG AbstractSaveEventListener: - transient instance of: cvo.test.Person
44:24,152 DEBUG DefaultSaveOrUpdateEventListener: - saving transient instance
44:24,152 DEBUG AbstractSaveEventListener: - generated identifier: 10, using strategy: org.hibernate.id.Assigned
44:24,152 DEBUG AbstractSaveEventListener: - saving [cvo.test.Person#10]
44:24,162 DEBUG Cascade: - done processing cascade ACTION_SAVE_UPDATE for: cvo.test.Employee
44:24,162 DEBUG JDBCTransaction: - commit
44:24,162 DEBUG SessionImpl: - automatically flushing session
44:24,162 DEBUG AbstractFlushingEventListener: - flushing session
44:24,162 DEBUG AbstractFlushingEventListener: - processing flush-time cascades
44:24,162 DEBUG Cascade: - processing cascade ACTION_SAVE_UPDATE for: cvo.test.Employee
44:24,162 DEBUG CascadingAction: - cascading to saveOrUpdate: cvo.test.Person
44:24,162 DEBUG AbstractSaveEventListener: - persistent instance of: cvo.test.Person
44:24,162 DEBUG DefaultSaveOrUpdateEventListener: - ignoring persistent instance
44:24,162 DEBUG DefaultSaveOrUpdateEventListener: - object already associated with session: [cvo.test.Person#10]
44:24,162 DEBUG Cascade: - done processing cascade ACTION_SAVE_UPDATE for: cvo.test.Employee
44:24,162 DEBUG AbstractFlushingEventListener: - dirty checking collections
44:24,162 DEBUG AbstractFlushingEventListener: - Flushing entities and processing referenced collections
44:24,162 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,162 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,162 DEBUG DefaultFlushEntityEventListener: - Updating entity: [cvo.test.Employee#2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a]
44:24,162 DEBUG AbstractFlushingEventListener: - Processing unreferenced collections
44:24,162 DEBUG AbstractFlushingEventListener: - Scheduling collection removes/(re)creates/updates
44:24,162 DEBUG AbstractFlushingEventListener: - Flushed: 1 insertions, 1 updates, 0 deletions to 2 objects
44:24,162 DEBUG AbstractFlushingEventListener: - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
44:24,162 DEBUG Printer: - listing entities:
44:24,172 DEBUG Printer: - cvo.test.Person{firstname=pieter, uid=10}
44:24,172 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,172 DEBUG Printer: - cvo.test.Employee{mailAddress=pieter.raemdonck@pfizer.com, person=cvo.test.Person#10}
44:24,172 DEBUG AbstractFlushingEventListener: - executing flush
44:24,172 DEBUG ConnectionManager: - registering flush begin
44:24,172 DEBUG AbstractEntityPersister: - Inserting entity: [cvo.test.Person#10]
44:24,172 DEBUG AbstractBatcher: - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
44:24,172 DEBUG SQL: - insert into person (firstname, uid) values (?, ?)
Hibernate: insert into person (firstname, uid) values (?, ?)
44:24,172 DEBUG AbstractBatcher: - preparing statement
44:24,172 DEBUG AbstractEntityPersister: - Dehydrating entity: [cvo.test.Person#10]
44:24,172 DEBUG StringType: - binding 'pieter' to parameter: 1
44:24,172 DEBUG IntegerType: - binding '10' to parameter: 2
44:24,172 DEBUG AbstractBatcher: - Executing batch size: 1
44:24,172 DEBUG AbstractBatcher: - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
44:24,172 DEBUG AbstractBatcher: - closing statement
44:24,172 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,172 DEBUG AbstractEntityPersister: - Updating entity: [cvo.test.Employee#2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a]
44:24,172 DEBUG AbstractBatcher: - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
44:24,172 DEBUG SQL: - update employee set mailAddress=? where personid=?
Hibernate: update employee set mailAddress=? where personid=?
44:24,172 DEBUG AbstractBatcher: - preparing statement
44:24,222 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,232 DEBUG AbstractEntityPersister: - Dehydrating entity: [cvo.test.Employee#2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a]
44:24,232 DEBUG StringType: - binding 'pieter.raemdonck@pfizer.com' to parameter: 1
44:24,232 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,232 DEBUG SerializableType: - binding '2c6d8085f3f2808fe3f6efaef4e5f3f4aed0e5f2f3efee8080808080808081828082cc8089e6e9f2f3f4eee1ede5f48092cceae1f6e1afece1eee7afd3f4f2e9eee7bbcc8083f5e9e4f48093cceae1f6e1afece1eee7afc9eef4e5e7e5f2bbf8f0f48086f0e9e5f4e5f2f3f28091eae1f6e1aeece1eee7aec9eef4e5e7e5f292622024770107b8828081c98085f6e1ecf5e5f8f28090eae1f6e1aeece1eee7aecef5ede2e5f2062c159d8b14600b828080f8f08080808a' to parameter: 2
44:24,232 DEBUG SerializationHelper: - Starting serialization of object [[Person: uid: 10 firstname: pieter]]
44:24,232 DEBUG AbstractBatcher: - Executing batch size: 1
44:24,232 ERROR AbstractBatcher: - Exception executing batch: 
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
   at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
   at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
   at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
   at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
   at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
   at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
   at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
   at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
   at cvo.test.Main.main(Main.java:20)
44:24,232 DEBUG AbstractBatcher: - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
44:24,242 DEBUG AbstractBatcher: - closing statement
44:24,242 ERROR AbstractFlushingEventListener: - Could not synchronize database state with session
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
   at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
   at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
   at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
   at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
   at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
   at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
   at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
   at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
   at cvo.test.Main.main(Main.java:20)
44:24,242 DEBUG ConnectionManager: - registering flush end
Exception in thread "main" org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
   at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
   at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
   at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
   at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
   at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)
   at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
   at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
   at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
   at cvo.test.Main.main(Main.java:20)

raemdop · **Joined:** Sat Dec 16, 2006 6:19 pm **Posts:** 3

I have solved it myself. I thought that hibernate would pick up the id from the person object itself. But it seems that it does not. So I have created an addtional id field for the employee class.

Employee.java

Code:

package cvo.test;

import java.io.Serializable;

public class Employee implements Serializable {

   
   private static final long serialVersionUID = 1L;
   
   private Integer uid;

   private Person person;

   private String mailAddress;

   public Employee() {
      super();
   }

   public Employee(Integer uid, Person person, String mailAddress) {
      super();
      this.uid = uid;
      this.person = person;
      this.mailAddress = mailAddress;
   }
   
   public Employee(Person person, String mailAddress) {
      super();
      this.person = person;
      this.mailAddress = mailAddress;
   }
   
   public Employee(Integer id, String firstname, String mailAddress) {
      super();
      this.person = new Person(id, firstname);
      this.mailAddress = mailAddress;
   }

   public Integer getUid() {
      return uid;
   }

   public void setUid(Integer uid) {
      this.uid = uid;
   }

   public String getMailAddress() {
      return mailAddress;
   }

   public void setMailAddress(String mailAddress) {
      this.mailAddress = mailAddress;
   }

   public Person getPerson() {
      return person;
   }

   public void setPerson(Person person) {
      this.person = person;
   }

   public String toString() {
      StringBuffer buffer = new StringBuffer();
      buffer.append("[Employee:");
      buffer.append(" uid: ");
      buffer.append(uid);
      buffer.append(" person: ");
      buffer.append(person);
      buffer.append(" mailAddress: ");
      buffer.append(mailAddress);
      buffer.append("]");
      return buffer.toString();
   }

   
   public boolean equals(Object o) {
      if (this == o) {
         return true;
      }
      if (o == null) {
         return false;
      }
      if (o.getClass() != getClass()) {
         return false;
      }
      Employee castedObj = (Employee) o;
      return ((this.uid == null ? castedObj.uid == null : this.uid
         .equals(castedObj.uid))
         && (this.person == null ? castedObj.person == null : this.person
            .equals(castedObj.person)) && (this.mailAddress == null
         ? castedObj.mailAddress == null
         : this.mailAddress.equals(castedObj.mailAddress)));
   }



}

Employee.hbm.xml

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cvo.test">
   <class name="Employee" table="employee" lazy="false">
      <id name="uid" column="uid">
         <generator class="foreign">
           <param name="property">person</param>
         </generator>
      </id>
      <property name="mailAddress" column="mailAddress"/>
      <one-to-one name="person" class="Person" cascade="all" constrained="true"/>
   </class>
</hibernate-mapping>

sql

Code:

DROP TABLE IF EXISTS `person`;
CREATE TABLE `person` (
  `uid` int(10) unsigned NOT NULL default '0',
  `firstname` varchar(50) NOT NULL default '',
  PRIMARY KEY  (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

DROP TABLE IF EXISTS `employee`;
CREATE TABLE `employee` (
  `uid` int(10) unsigned NOT NULL default '0',
  `mailAddress` varchar(45) NOT NULL default '',
  PRIMARY KEY  (`uid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ;