hibernate-one-to-one mapping

      1                                 1 

Customer-------------------------------> Address

---------------------------------Address Class----------------------------

package hibernate.onetoone;

public class Address {

    private int addId;

    private String street;

    private String city;

    private String state;

    public Address(String street, String city, String state) {

        this.street = street;

        this.city = city;

        this.state = state;

    }

// getters and setters

}

-------------------Customer Class---------------------------------

package hibernate.onetoone;

public class Customer {

    private int cid;

    private String cname;

    private String email;

    private String phone;

    private String bal;

    private Address address;

  

    public Customer (String cname,String email,String phone,String bal,Address address){

        this.cname = cname;

        this.email = email;

        this.phone = phone;

        this.bal = bal;

        this.address = address;

    }

//getters and setters

}

---------------------Address.hbm.xml-------------------------------

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="hibernate.onetoone">

    <class name="Address" table="ADDRESS">

        <id name="addId">

            <generator class="increment" />

        </id>

        <property name="street" />

        <property name="city" />

        <property name="state" />

    </class>

</hibernate-mapping>

------------------------------Customer.hbm.xml--------------

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="hibernate.onetoone">

    <class name="Customer" table="CUSTOMER">

        <id name="cid">

            <generator class="increment" />

        </id>

        <property name="cname" />

        <property name="email" />

        <property name="phone" />

        <property name="bal" />

        <many-to-one name="address" class="Address" column="addId" unique="true"></many-to-one>      

    </class>

</hibernate-mapping>

  ---------------------hibernate.cfg.xml-----------------

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration PUBLIC

"-//Hibernate/Hibernate Configuration DTD//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>

        <property name="hibernate.connection.url">jdbc:oracle:thin:@Mukesh-PC:1521/XE</property>

        <property name="hibernate.connection.username">mukesh</property>

        <property name="hibernate.connection.password">mukesh</property>

        <property name="hibernate.connection.pool_size">10</property>

        <property name="hibernate.show_sql">true</property>

        <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>

        <property name="hibernate.hbm2ddl.auto">update</property>

        <property name="hibernate.format_sql">true</property>

      

       

        <!-- Mapping files -->

        <mapping resource="hibernate/onetoone/Address.hbm.xml" />

        <mapping resource="hibernate/onetoone/Customer.hbm.xml" />

    </session-factory>

</hibernate-configuration>

-------------------------------------HibernateUtil.java-------------------

package hibernate.onetoone;

import org.hibernate.HibernateException;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class HibernateUtil {

    public static final ThreadLocal session = new ThreadLocal();

    public static final SessionFactory sessionFactory;

    public static Session currentSession() throws HibernateException {

        Session s = (Session) session.get();

        if (s == null) {

            s = sessionFactory.openSession();

            session.set(s);

        }

        return s;

    }

    static {

        try {

            String xml = "hibernate/onetoone/hibernate.cfg.xml";

            Configuration config = new Configuration().configure(xml);

            sessionFactory = config.buildSessionFactory();

        } catch (Throwable ex) {

            System.err.println("Initial SessionFactory creation failed." + ex);

            throw new ExceptionInInitializerError(ex);

        }

    }

}

--------------------------HibernateMain.java------------------------

import org.hibernate.Session;

import org.hibernate.Transaction;

public class HibernateMain {

    public static void main(String[] args) {

        Session session = HibernateUtil.currentSession();

        Transaction tx = session.beginTransaction();

        Address add = new Address("MSR", "bangalore", "KA");

        session.save(add);

        Customer cust = new Customer("Mukesh", "a@b.com", "22222", "1000", add);

        cust.setAddress(add);

        session.save(cust);

        tx.commit();

        session.close();

    }

}