package org.jpwh.model.advanced;

 import javax.persistence.AttributeOverride;

 import javax.persistence.AttributeOverrides;

 import javax.persistence.Column;

 import javax.persistence.Embeddable;

 import javax.validation.constraints.NotNull;

 @Embeddable

 public class Address {

     @NotNull

     @Column(nullable = false)

     protected String street;

     @NotNull

     @AttributeOverrides(

         @AttributeOverride(

             name = "name",

             column = @Column(name = "CITY", nullable = false)

         )

     )

     protected City city;

     public String getStreet() {

         return street;

     }

     public void setStreet(String street) {

         this.street = street;

     }

     public City getCity() {

         return city;

     }

     public void setCity(City city) {

         this.city = city;

     }

     // ...

 }

 package org.jpwh.model.advanced;

 import javax.persistence.Column;

 import javax.persistence.Embeddable;

 import javax.validation.constraints.NotNull;

 @Embeddable

 public class City {

     @NotNull

     @Column(nullable = false, length = 5) // Override VARCHAR(255)

     protected String zipcode;

     @NotNull

     @Column(nullable =  false)

     protected String name;

     @NotNull

     @Column(nullable =  false)

     protected String country;

     public String getZipcode() {

         return zipcode;

     }

     public void setZipcode(String zipcode) {

         this.zipcode = zipcode;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public String getCountry() {

         return country;

     }

     public void setCountry(String country) {

         this.country = country;

     }

     // ...

 }

 package org.jpwh.model.advanced;

 import org.jpwh.model.Constants;

 import javax.persistence.Entity;

 import javax.persistence.GeneratedValue;

 import javax.persistence.Id;

 import javax.persistence.Table;

 @Entity

 @Table(name = "USERS")

 public class User {

     @Id

     @GeneratedValue(generator = Constants.ID_GENERATOR)

     protected Long id;

     public Long getId() {

         return id;

     }

     protected Address address;

     public Address getAddress() {

         return address;

     }

     public void setAddress(Address address) {

         this.address = address;

     }

 }