Hibernate Ders07 - Inheritance Mapping - IV

Sınıf başına bir tablo örneğini notasyonla yapalım.

Main.java

package test;

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

public class Main {

 public static void main(String[] args) {

  
     Configuration cfg=new Configuration();  
     cfg.configure("hibernate.cfg.xml");
     SessionFactory factory=cfg.buildSessionFactory();
     Session session=factory.openSession();
     Transaction t=session.beginTransaction();  

  Personel p = new Personel();
  p.setAd("enes");

  Maas m = new Maas();
  m.setAd("enes2");
  m.setMaas(3500);

  Araba a = new Araba();
  a.setAd("enes3");
  a.setMarka("opel");
  a.setModel("astra");

  session.persist(p);
  session.persist(m);
  session.persist(a);

  t.commit();
  session.close();
  System.out.println("basarili islem !");

 }

}

Personel.java

package test;

import javax.persistence.Column;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.DiscriminatorType;
import javax.persistence.Table;

@Entity
@Table(name = "perstab2")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class Personel {
 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 @Column(name = "id")
 private int id;
 
 @Column(name = "ad")
 private String ad;

 public int getId() {
  return id;
 }

 public void setId(int id) {
  this.id = id;
 }

 public String getAd() {
  return ad;
 }

 public void setAd(String ad) {
  this.ad = ad;
 }

}

Maas.java

package test;

import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.Table;

@Entity  
@Table(name="maas")  
@AttributeOverrides({  
    @AttributeOverride(name="id", column=@Column(name="idsi")),  
    @AttributeOverride(name="ad", column=@Column(name="adi"))  
})  
public class Maas extends Personel {

 // @Column(name="maas") demesem de olur.
 private int maas;

 public int getMaas() {
  return maas;
 }

 public void setMaas(int maas) {
  this.maas = maas;
 }
}

Araba.java

package test;

import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.Table;

@Entity  
@Table(name="araba")  
@AttributeOverrides({  
    @AttributeOverride(name="id", column=@Column(name="idsi")),  
    @AttributeOverride(name="ad", column=@Column(name="adi"))  
})  
public class Araba extends Personel {
 private String marka;
 private String model;

 public String getMarka() {
  return marka;
 }

 public void setMarka(String marka) {
  this.marka = marka;
 }

 public String getModel() {
  return model;
 }

 public void setModel(String model) {
  this.model = model;
 }

}

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>  
        <property name="hbm2ddl.auto">update</property>  
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>  
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>  
        <property name="connection.username">**kullaniciAdiniz**</property>  
        <property name="connection.password">**şifreniz**/property>  
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>  
     <mapping class="test.Personel"/> 
     <mapping class="test.Maas"/> 
     <mapping class="test.Araba"/> 
    </session-factory>  
</hibernate-configuration>