How to use @AttributeOverrides and @AttributeOverride annotations in hibernate

//In this program suppose we have some address now we want to add some other address without modifying the address table

Address.java

package com.hibernate.model;

import javax.persistence.Embeddable;

@Embeddable

public class Address {

private String street;

private String city;

private String district;

private String country;

private Integer postalcode;

public String getStreet() {

return street;

}

public void setStreet(String street) {

this.street = street;

}

public String getCity() {

return city;

}

public void setCity(String city) {

this.city = city;

}

public String getDistrict() {

return district;

}

public void setDistrict(String district) {

this.district = district;

}

public String getCountry() {

return country;

}

public void setCountry(String country) {

this.country = country;

}

public Integer getPostalcode() {

return postalcode;

}

public void setPostalcode(Integer postalcode) {

this.postalcode = postalcode;

}

}

UserDetails.java

package com.hibernate.model;

import javax.persistence.AttributeOverride;

import javax.persistence.AttributeOverrides;

import javax.persistence.Column;

import javax.persistence.Embedded;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name = "userdet")

public class UserDetails {

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer userId;

private String userName;

@Embedded

@AttributeOverrides({

@AttributeOverride(name = "street", column = @Column(name = "HOME_STREET_NAME")),

@AttributeOverride(name = "city", column = @Column(name = "HOME_CITY_NAME")),

@AttributeOverride(name = "district", column = @Column(name = "HOME_DISTRICT_NAME")),

@AttributeOverride(name = "country", column = @Column(name = "HOME_COUNTRY_NAME")),

@AttributeOverride(name = "postalcode", column = @Column(name = "HOME_POSTALCODE_NAME"))

})

private Address homeAddress;

@Embedded

private Address officeAddress;

public Address getOfficeAddress() {

return officeAddress;

}

public void setOfficeAddress(Address officeAddress) {

this.officeAddress = officeAddress;

}

public Address getHomeAddress() {

return homeAddress;

}

public void setHomeAddress(Address homeAddress) {

this.homeAddress = homeAddress;

}

public Integer getUserId() {

return userId;

}

public void setUserId(Integer userId) {

this.userId = userId;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

}

Useraccess.java

package com.hibernate;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import com.hibernate.model.Address;

import com.hibernate.model.UserDetails;

public class UserAccess {

public static void main(String[] args) {

// TODO Auto-generated method stub

UserDetails user = new UserDetails();

user.setUserName("karthik reddy");

Address address = new Address();

address.setStreet("Kattamanchi");

address.setCity("Chittoor");

address.setDistrict("Chittoor");

address.setCountry("India");

address.setPostalcode(517130);

Address address1 = new Address();

address1.setStreet("ilavaripalli");

address1.setCity("irala");

address1.setDistrict("Bangalore");

address1.setCountry("America");

address1.setPostalcode(512130);

SessionFactory factory = new Configuration().configure()

.buildSessionFactory();

Session session = factory.openSession();

session.beginTransaction();

user.setHomeAddress(address);

user.setOfficeAddress(address1);

session.save(user);

session.getTransaction().commit();

session.close();

factory.close();

}

}

hibernate.cfg.xml

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

<!DOCTYPE hibernate-configuration PUBLIC

"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

<!-- Database connection settings -->

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

<property name="connection.url">jdbc:oracle:thin:@localhost:1521:XE</property>

<property name="connection.username">system</property>

<property name="connection.password">system</property>

<!-- JDBC connection pool (use the built-in) -->

<property name="connection.pool_size">1</property>

<!-- SQL dialect -->

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

<!-- Echo all executed SQL to stdout -->

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

<!-- Drop and re-create the database schema on startup -->

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

<mapping class="com.hibernate.model.UserDetails" />

</session-factory>

</hibernate-configuration>