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Composite key with one to many hibernate

I'm having a big problem trying to make this little program work
Here are my objects:
Class Country
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
public class Country implements Serializable {
private static final long serialVersionUID = 4947071545454L;
private String countryID;
private String countryName;
private Set<City> cities = new HashSet<City>();
public Country() {
}
public Country(String countryID, String countryName, Set<City> cities) {
this.countryID = countryID;
this.countryName = countryName;
this.cities = cities;
}
public static long getSerialVersionUID() {
return serialVersionUID;
}
public String getCountryID() {
return countryID;
}
public void setCountryID(String countryID) {
this.countryID = countryID;
}
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
public Set<City> getCities() {
return cities;
}
public void setCities(Set<City> cities) {
this.cities = cities;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Country country = (Country) o;
return countryID != null ? countryID.equals(country.countryID) : country.countryID == null;
}
#Override
public int hashCode() {
return countryID != null ? countryID.hashCode() : 0;
}
public boolean addCity(City c){
return cities.add(c);
}
public boolean removeCity(City c){
return cities.remove(c);
}
}
Class City
import java.io.Serializable;
public class City implements Serializable{
private static final long serialVersionUID = 49470713545454L;
private String cityName;
private Country id;
public City(String cityName, Country id) {
this.cityName = cityName;
this.id = id;
}
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public Country getId() {
return id;
}
public void setId(Country id) {
this.id = id;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
City city = (City) o;
if (cityName != null ? !cityName.equals(city.cityName) : city.cityName != null) return false;
return id != null ? id.equals(city.id) : city.id == null;
}
#Override
public int hashCode() {
int result = cityName != null ? cityName.hashCode() : 0;
result = 31 * result + (id != null ? id.hashCode() : 0);
return result;
}
}
An here are my xml archives:
country.hbm.xml
<?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>
<class name="com.samuel.hibernate.Country" table="country" catalog="training2">
<id name="country" type="string" column="countryID">
<generator class="assign"/>
</id>
<property name="countryName" type="string">
<column name="countryName" length="40" not-null="true" unique="true" />
</property>
<set name="city" inverse="true" cascade="all">
<key column="countryID" not-null="true" />
<one-to-many class="com.samuel.hibernate.City"/>
</set>
</class>
</hibernate-mapping>
city.hbm.xml
<?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>
<class name="com.samuel.hibernate.City" table="city" catalog="training2">
<composite-id name="id">
<key-many-to-one name="countryID" class="com.samuel.hibernate.Country"
column="countryID" />
<key-property name="cityName" column="cityName" type="string"/>
</composite-id>
</class>
</hibernate-mapping>
And here's my main class:
Main class
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] args) {
System.out.println("..");
Configuration cfg=new Configuration();
cfg.configure("hibernate.cfg.xml");
// aquí es donde peta si falla conexión con Postgres
//creating seession factory object
System.out.println("Antes de crear sesion");
SessionFactory factory=cfg.buildSessionFactory();
System.out.println("Despues de crear sesion");
//creating session object
Session session=factory.openSession();
//creating transaction object
Transaction t=session.beginTransaction();
Set<City> citiesSpain = new HashSet<>();
Country spain = new Country("es","Spain",citiesSpain);
citiesSpain.add(new City("Barcelona",spain));
citiesSpain.add(new City("Madrid",spain));
session.persist(spain);
t.commit();
session.close();
factory.close();
System.out.println("END");
}
}
When I execute this code I get this error message:
Exception in thread "main" org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.component.PojoComponentTuplizer]
at org.hibernate.tuple.component.ComponentTuplizerFactory.constructTuplizer(ComponentTuplizerFactory.java:98)
at org.hibernate.tuple.component.ComponentTuplizerFactory.constructDefaultTuplizer(ComponentTuplizerFactory.java:119)
at org.hibernate.tuple.component.ComponentMetamodel.<init>(ComponentMetamodel.java:68)
at org.hibernate.mapping.Component.getType(Component.java:169)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:422)
at org.hibernate.mapping.RootClass.validate(RootClass.java:266)
at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:329)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:451)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:710)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726)
at com.samuel.hibernate.Main.main(Main.java:22)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.hibernate.tuple.component.ComponentTuplizerFactory.constructTuplizer(ComponentTuplizerFactory.java:95)
... 10 more
Caused by: org.hibernate.PropertyNotFoundException: Could not locate getter method for property [com.samuel.hibernate.Country#cityName]
at org.hibernate.internal.util.ReflectHelper.findGetterMethod(ReflectHelper.java:418)
at org.hibernate.property.access.internal.PropertyAccessBasicImpl.<init>(PropertyAccessBasicImpl.java:41)
at org.hibernate.property.access.internal.PropertyAccessStrategyBasicImpl.buildPropertyAccess(PropertyAccessStrategyBasicImpl.java:27)
at org.hibernate.mapping.Property.getGetter(Property.java:308)
at org.hibernate.tuple.component.PojoComponentTuplizer.buildGetter(PojoComponentTuplizer.java:138)
at org.hibernate.tuple.component.AbstractComponentTuplizer.<init>(AbstractComponentTuplizer.java:47)
at org.hibernate.tuple.component.PojoComponentTuplizer.<init>(PojoComponentTuplizer.java:41)
... 15 more
I've tried looking online but I don't seem to find the solution. In my example, one country can have many cities, but one city can only have on country.

This error means that one or more setters/getters is missing. Make sure you define matching getters/setters for all your properties. And make sure that your properties annotated correctly.
I think that problem is that your cities set name is different in a class and in hbm.xml file. In your entity class you defined set as Set<City> cities and in your XML file you defined this property as name="city". So hibernate is searching setters and getters for city named property.
Make sure that variable and property name coincides. And add empty constructor in City.class.

How Lazy loading of child records works in Hibernate?

I know the above question is very common but I just wanted to know exactly when and How Hibernate is fetching the lazily loaded child records.
below is the sample table structure:
Table Structure:
employee_table(e_id, e_name, e_sal)
(100, XYZ, 20000)
mobile_table(m_id, m_number, e_id)
(1, 8728271817, 100)
(2, 0983813919, 100)
Employee.java
public class Employee implements Serializable {
private static final long serialVersionUID = 1930751473454928876L;
private long employeeId;
private String employeeName;
private double employeeSal;
private Set<Mobile> mobiles;
public long getEmployeeId() {
return employeeId;
}
public void setEmployeeId(long employeeId) {
this.employeeId = employeeId;
}
public String getEmployeeName() {
return employeeName;
}
public void setEmployeeName(String employeeName) {
this.employeeName = employeeName;
}
public double getEmployeeSal() {
return employeeSal;
}
public void setEmployeeSal(double employeeSal) {
this.employeeSal = employeeSal;
}
public Set<Mobile> getMobiles() {
return mobiles;
}
public void setMobiles(Set<Mobile> mobiles) {
this.mobiles = mobiles;
}
}
Employee.hbm.xml
<hibernate-mapping>
<class name="edu.sandip.hibernate.Employee" table="EMPLOYEE_T">
<id name="employeeId" column="e_id" type="long">
<generator class="increment" />
</id>
<property name="employeeName" column="e_name" type="string" />
<property name="employeeSal" column="e_sal" type="double" />
<set name="mobiles" table="MOBILE_T" inverse="true" lazy="true" fetch="select" >
<key>
<column name="e_id" not-null="true" />
</key>
<one-to-many class="edu.sandip.hibernate.Mobile" />
</set>
</class>
</hibernate-mapping>
Mobile.java
public class Mobile implements Serializable {
private static final long serialVersionUID = 6279006639448045512L;
private long mobId;
private String mobileNumber;
private Employee employee;
public long getMobId() {
return mobId;
}
public void setMobId(long mobId) {
this.mobId = mobId;
}
public String getMobileNumber() {
return mobileNumber;
}
public void setMobileNumber(String mobileNumber) {
this.mobileNumber = mobileNumber;
}
public Employee getEmployee() {
return employee;
}
public void setEmployee(Employee employee) {
this.employee = employee;
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((mobileNumber == null) ? 0 : mobileNumber.hashCode());
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Mobile other = (Mobile) obj;
if (mobileNumber == null) {
if (other.mobileNumber != null)
return false;
} else if (!mobileNumber.equals(other.mobileNumber))
return false;
return true;
}
}
Mobile.hbm.xml
<hibernate-mapping>
<class name="edu.sandip.hibernate.Mobile" table="MOBILE_T">
<id name="mobId" column="m_id" type="long">
<generator class="increment" />
</id>
<property name="mobileNumber" column="m_number" type="string" />
<many-to-one name="employee" class="edu.sandip.hibernate.Employee" fetch="select">
<column name="e_id" not-null="true" />
</many-to-one>
</class>
</hibernate-mapping>
Below is the code block to fetch the list of employees:
public List<Employee> getAllEmployees() {
List<Employee> list = null;
Session session = null;
try {
session = getSession();
Query query = session.createQuery("FROM Employee");
list = query.list();
for(Employee employee : list) {
System.out.println("Emaployee Name: " + employee.getEmployeeName);
Set<Mobile> mobileSet = employee.getMobiles();
System.out.println("Mobile Numbers: ");
for(Mobile mobile : mobileSet) {
System.out.println(mobile.getMobileNumber());
}
}
} catch(Exception e) {
e.printStackTrace();
} finally {
if(session != null) {
System.out.println("session is still alive");
releaseSession(session);
}
}
return (list);
}
Now, Here the Mobile numbers is the child record of Employee which is been loaded by the Hibernate lazily as per the hibernate configuration in Employee.hbm.xml (lazy = true)
In the above code, after printing the employee name I am printing the mobile numbers of that
employee by iterating the Set mobiles.
I have checked and found that the iteration of the mobileSet is actually fetching the mobileNumbers.
i.e.
for(Mobile mobile : mobileSet) {
System.out.println(mobile.getMobileNumber());
}
SO, How It is happening? Because I am not using any hibernate specific API to fetch the lazily loaded child records. Just Iterating over the set of mobile numbers.
Then how Hibernate is fetching the child records internally? What is the background job that Hibernate is doing while I am iterating over the mobileSet?
Please help in understanding my doubt.

In hibernate lazy loading is triggered whenever a lazy loaded property is accessed and it is still managed by the em. If you would access a lazy loaded property when the entity is detached from the entity manager you would get a org.hibernate.LazyInitializationException
To apply the logic to your example:
mobile.getMobileNumber() will trigger the lazy loading in your code. Hibernate will then automaticly issue a query to the database. This works because hibernate instantiates proxy objects for lazy loaded propertys, once you try to access these proxys hibernate tries to load them in from the database. this will work if the object is managed and this will result in forementioned exception if the entity is detached. There is no need at all to use a hibernate API to trigger the lazy loading it just happens automaticly when a lazy configured property is accessed

In your Employee.hbm.xml file you have stated that the fetch strategy for Mobile is lazy.
That tells hibernate to generate a simple SQL statement to the table that corresponds to Employee without performing any joins with the corresponding Mobile table.
However when employee.getMobiles() is called,
Hibernate will issue a select query to the latter table using a where clause with the primary key of the former table.
The way the fetching is implemented here leads to the infamous N+1 problem

This topic could help you to understand what is the trick behind lazy loading :
How proxy loads the lazy property in Hibernate/JPA

Hibernate Mapped Composite Key ManyToMany results in ClassCastException

I am struggling with a hibernate problem since hours and can not find any help on any website. I've read dozens of tutorials, tried everything but I always end up with a class cast exception or compilation errors.
My schema in this particular part of the database (mysql innodb) are Plane and Steward. They share a Many2Many relationship.
Using Hibernate Code Generation and Hibernate Tools I generated all POJO classes and the mapping files (including a FlightHasStewardId and FlightHasSteward -> Mapped Composite ID).
I now want to read out all stewards on flight 100!
Notice: Reading other entities works, just M2M reading results in ClassCastEX.
Here my input:
Mapping of FlightHasSteward:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Generated Jan 1, 2014 1:52:14 PM by Hibernate Tools 4.0.0 -->
<hibernate-mapping>
<class name="FlightHasSteward" table="Flight_has_Steward" catalog="project3flight">
<composite-id name="id" class="FlightHasStewardId">
<key-property name="flightIdflight" type="int">
<column name="Flight_idflight" />
</key-property>
<key-property name="stewardIdsteward" type="int">
<column name="Steward_idsteward" />
</key-property>
</composite-id>
</class>
</hibernate-mapping>
FlightHasSteward.java:
// default package
// Generated Jan 1, 2014 1:52:14 PM by Hibernate Tools 4.0.0
/**
* FlightHasSteward generated by hbm2java
*/
public class FlightHasSteward implements java.io.Serializable {
private FlightHasStewardId id;
public FlightHasSteward() {
}
public FlightHasSteward(FlightHasStewardId id) {
this.id = id;
}
public FlightHasStewardId getId() {
return this.id;
}
public void setId(FlightHasStewardId id) {
this.id = id;
}
}
FlightHasStewardId.java:
// default package
// Generated Jan 1, 2014 1:52:14 PM by Hibernate Tools 4.0.0
/**
* FlightHasStewardId generated by hbm2java
*/
public class FlightHasStewardId implements java.io.Serializable {
private int flightIdflight;
private int stewardIdsteward;
public FlightHasStewardId() {
}
public FlightHasStewardId(int flightIdflight, int stewardIdsteward) {
this.flightIdflight = flightIdflight;
this.stewardIdsteward = stewardIdsteward;
}
public int getFlightIdflight() {
return this.flightIdflight;
}
public void setFlightIdflight(int flightIdflight) {
this.flightIdflight = flightIdflight;
}
public int getStewardIdsteward() {
return this.stewardIdsteward;
}
public void setStewardIdsteward(int stewardIdsteward) {
this.stewardIdsteward = stewardIdsteward;
}
public boolean equals(Object other) {
if ((this == other))
return true;
if ((other == null))
return false;
if (!(other instanceof FlightHasStewardId))
return false;
FlightHasStewardId castOther = (FlightHasStewardId) other;
return (this.getFlightIdflight() == castOther.getFlightIdflight())
&& (this.getStewardIdsteward() == castOther.getStewardIdsteward());
}
public int hashCode() {
int result = 17;
result = 37 * result + this.getFlightIdflight();
result = 37 * result + this.getStewardIdsteward();
return result;
}
}
Reader.java (my class to read):
/* Method to READ all the stewards on specific flight */
public void getStewards(int flightid) {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
// Query query = session
// .createQuery(" FROM FlightHasSteward as FHS LEFT JOIN FHS.Flight AS F ON F.idFlight = FHS.Flight_idFlight RIGHT JOIN FHS.Steward AS S ON S.idSteward = FHS.Steward_idSteward where FHS.Flight_idFlight = :code");
Query query = session.createQuery(" FROM FlightHasSteward where Flight_idFlight = :code");
query.setParameter("code", flightid);
List<FlightHasStewardId> result = query.list();
final List<FlightHasStewardId> res = (List<FlightHasStewardId>) query.list();
for (final FlightHasStewardId hall_calendar : res) {
System.out.println(hall_calendar.getStewardIdsteward());
}
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
And the disturbing output:
Exception in thread "main" java.lang.ClassCastException: FlightHasSteward cannot be cast to FlightHasStewardId
at Reader.getStewards(Reader.java:97)
at Manager.main(Manager.java:24)
I would appreciate any help with this case, thank you all in advance.

You're selecting from FlightHasSteward so the resultant List will contain those types rather than FlightHasStewardId
Query query = session.createQuery(" FROM FlightHasSteward where Flight_idFlight = :code");
query.setParameter("code", flightid);
List<FlightHasSteward> result = query.list();
final List<FlightHasSteward> res = (List<FlightHasSteward>) query.list();
for (final FlightHasSteward steward : res) {
System.out.println(steward.getId().getStewardIdsteward());
}

JPA with Hibernate - Sequence not working with XML

I'm using JPA with Hibernate for the first time and I try to set up automated ID generation using existing sequences from my Oracle database.
My entity mapping looks as follows:
<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
version="2.0">
<entity class="AmmAdapter.DataAccessLayer.Models.AmmSyncTypePriorities">
<table name="AMM_SYNC_TYPE_PRIORITIES" schema="TESTESTERON" catalog=""/>
<attributes>
<id name="id">
<column name="ID" nullable="false" length="10"/>
<generated-value strategy="SEQUENCE" generator="MODEL_SEQ"/>
<sequence-generator name="MODEL_SEQ" sequence-name="AMM_ED_GROUP_TYPES_SEQ"/>
</id>
<basic name="priority">
<column name="PRIORITY" nullable="false" length="10"/>
</basic>
<one-to-many name="ammSyncMessageTypesesById" mapped-by="ammSyncTypePrioritiesByPriority"
target-entity="AmmAdapter.DataAccessLayer.Models.AmmSyncMessageTypes"/>
</attributes>
</entity>
</entity-mappings>
My Java class looks as follows:
package AmmAdapter.DataAccessLayer.Models;
import java.util.Collection;
public class AmmEdGroupTypes
{
private Integer id;
public Integer getId()
{
return id;
}
public void setId(Integer id)
{
this.id = id;
}
private String name;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
#Override
public boolean equals(Object o)
{
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
AmmEdGroupTypes that = (AmmEdGroupTypes)o;
if (id != null ? !id.equals(that.id) : that.id != null) return false;
if (name != null ? !name.equals(that.name) : that.name != null) return false;
return true;
}
#Override
public int hashCode()
{
int result = id != null ? id.hashCode() : 0;
result = 31 * result + (name != null ? name.hashCode() : 0);
return result;
}
private Collection<AmmEndDeviceGroups> ammEndDeviceGroupsesById;
public Collection<AmmEndDeviceGroups> getAmmEndDeviceGroupsesById()
{
return ammEndDeviceGroupsesById;
}
public void setAmmEndDeviceGroupsesById(Collection<AmmEndDeviceGroups> ammEndDeviceGroupsesById)
{
this.ammEndDeviceGroupsesById = ammEndDeviceGroupsesById;
}
}
And my sequence AMM_ED_GROUP_TYPES_SEQ has:
Min value: 1
Max value: 9999999999999999999999999999
Increment by: 1
I use the following test code to determine if auto generation is working:
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("AdapterPersistence");
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
AmmEdGroupTypes newGroup = new AmmEdGroupTypes();
newGroup.setName("test");
System.out.println(newGroup.getId());
And I get a null ID as result. Does someone know what the problem is?

EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
AmmEdGroupTypes newGroup = new AmmEdGroupTypes();
newGroup.setName("test");
entityManager.persist(newGroup);
entityManager.getTransaction().commit();
System.out.println(newGroup.getId());

Hibernate create too much java classes

I generate java classes from db with hibernate. In configuration i set to generate:
And get 3 files from each table. For example:
Address.java
package gen;
// Generated 16.08.2012 12:47:01 by Hibernate Tools 3.4.0.CR1
/**
* Address generated by hbm2java
*/
public class Address implements java.io.Serializable
{
private AddressId id;
public Address()
{
}
public Address(AddressId id)
{
this.id = id;
}
public AddressId getId()
{
return this.id;
}
public void setId(AddressId id)
{
this.id = id;
}
}
AddressId.java
package gen;
// Generated 16.08.2012 12:47:01 by Hibernate Tools 3.4.0.CR1
/**
* AddressId generated by hbm2java
*/
public class AddressId implements java.io.Serializable
{
private String codeOkato;
private String codeKladr;
private String postalCode;
private String region;
private String house;
private String building;
private String structure;
private String apartment;
private String note;
public AddressId()
{
}
public AddressId(String codeOkato, String codeKladr, String postalCode, String region, String house, String building,
String structure, String apartment, String note)
{
this.codeOkato = codeOkato;
this.codeKladr = codeKladr;
this.postalCode = postalCode;
this.region = region;
this.house = house;
this.building = building;
this.structure = structure;
this.apartment = apartment;
this.note = note;
}
public String getCodeOkato()
{
return this.codeOkato;
}
public void setCodeOkato(String codeOkato)
{
this.codeOkato = codeOkato;
}
public String getCodeKladr()
{
return this.codeKladr;
}
public void setCodeKladr(String codeKladr)
{
this.codeKladr = codeKladr;
}
public String getPostalCode()
{
return this.postalCode;
}
public void setPostalCode(String postalCode)
{
this.postalCode = postalCode;
}
public String getRegion()
{
return this.region;
}
public void setRegion(String region)
{
this.region = region;
}
public String getHouse()
{
return this.house;
}
public void setHouse(String house)
{
this.house = house;
}
public String getBuilding()
{
return this.building;
}
public void setBuilding(String building)
{
this.building = building;
}
public String getStructure()
{
return this.structure;
}
public void setStructure(String structure)
{
this.structure = structure;
}
public String getApartment()
{
return this.apartment;
}
public void setApartment(String apartment)
{
this.apartment = apartment;
}
public String getNote()
{
return this.note;
}
public void setNote(String note)
{
this.note = note;
}
public boolean equals(Object other)
{
if ((this == other))
return true;
if ((other == null))
return false;
if (!(other instanceof AddressId))
return false;
AddressId castOther = (AddressId) other;
return ((this.getCodeOkato() == castOther.getCodeOkato()) || (this.getCodeOkato() != null
&& castOther.getCodeOkato() != null && this.getCodeOkato().equals(castOther.getCodeOkato())))
&& ((this.getCodeKladr() == castOther.getCodeKladr()) || (this.getCodeKladr() != null
&& castOther.getCodeKladr() != null && this.getCodeKladr().equals(castOther.getCodeKladr())))
&& ((this.getPostalCode() == castOther.getPostalCode()) || (this.getPostalCode() != null
&& castOther.getPostalCode() != null && this.getPostalCode().equals(castOther.getPostalCode())))
&& ((this.getRegion() == castOther.getRegion()) || (this.getRegion() != null && castOther.getRegion() != null && this
.getRegion().equals(castOther.getRegion())))
&& ((this.getHouse() == castOther.getHouse()) || (this.getHouse() != null && castOther.getHouse() != null && this
.getHouse().equals(castOther.getHouse())))
&& ((this.getBuilding() == castOther.getBuilding()) || (this.getBuilding() != null
&& castOther.getBuilding() != null && this.getBuilding().equals(castOther.getBuilding())))
&& ((this.getStructure() == castOther.getStructure()) || (this.getStructure() != null
&& castOther.getStructure() != null && this.getStructure().equals(castOther.getStructure())))
&& ((this.getApartment() == castOther.getApartment()) || (this.getApartment() != null
&& castOther.getApartment() != null && this.getApartment().equals(castOther.getApartment())))
&& ((this.getNote() == castOther.getNote()) || (this.getNote() != null && castOther.getNote() != null && this
.getNote().equals(castOther.getNote())));
}
public int hashCode()
{
int result = 17;
result = 37 * result + (getCodeOkato() == null ? 0 : this.getCodeOkato().hashCode());
result = 37 * result + (getCodeKladr() == null ? 0 : this.getCodeKladr().hashCode());
result = 37 * result + (getPostalCode() == null ? 0 : this.getPostalCode().hashCode());
result = 37 * result + (getRegion() == null ? 0 : this.getRegion().hashCode());
result = 37 * result + (getHouse() == null ? 0 : this.getHouse().hashCode());
result = 37 * result + (getBuilding() == null ? 0 : this.getBuilding().hashCode());
result = 37 * result + (getStructure() == null ? 0 : this.getStructure().hashCode());
result = 37 * result + (getApartment() == null ? 0 : this.getApartment().hashCode());
result = 37 * result + (getNote() == null ? 0 : this.getNote().hashCode());
return result;
}
}
Address.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 16.08.2012 12:47:01 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="gen.Address" table="address">
<composite-id name="id" class="gen.AddressId">
<key-property name="codeOkato" type="string">
<column name="code_okato" length="11" />
</key-property>
<key-property name="codeKladr" type="string">
<column name="code_kladr" length="20" />
</key-property>
<key-property name="postalCode" type="string">
<column name="postal_code" length="6" />
</key-property>
<key-property name="region" type="string">
<column name="region" />
</key-property>
<key-property name="house" type="string">
<column name="house" />
</key-property>
<key-property name="building" type="string">
<column name="building" />
</key-property>
<key-property name="structure" type="string">
<column name="structure" />
</key-property>
<key-property name="apartment" type="string">
<column name="apartment" />
</key-property>
<key-property name="note" type="string">
<column name="note" length="1500" />
</key-property>
</composite-id>
</class>
</hibernate-mapping>
How you can see in mapping file uses class Address.java. But with this class i cant set or get any parametrs like apartment or building. There only in AddressId class.
I all examples with hibernate what i see uses only one java class. What function of second class which hibernate fenerate.
So i wanna do all correct. And how i gonna generate java classes or use what i generete to waork with xml files and data base?
And another question how to create annotations in cenerated java classes autometiclly?

To generate annotations instead of hbm.xml, you should uncheck Hibernate XML mappings(.hbm.xml) and choose Generate EJB3 annotations.
Hibernate generates separate class for ID when table's primary key consists of multiple columns. It also does so when table does not have primary key at all.