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CheckNull.java
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import java.util.Date;
import org.hibernate.Session;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.criterion.Restrictions;
import tables.Temp;
public class CheckNull {
public static void main(String[] args){
Configuration cfg = new AnnotationConfiguration()
.addAnnotatedClass(Temp.class)
.setProperty("hibernate.dialect", "org.hibernate.dialect.OracleDialect")
.setProperty("hibernate.connection.driver_class", "oracle.jdbc.driver.OracleDriver")
.setProperty("hibernate.connection.url", "jdbc:oracle:thin:@127.0.0.1:1521:XE")
.setProperty("hibernate.connection.username", "technik")
.setProperty("hibernate.connection.password", "technik")
;
Session session=cfg.buildSessionFactory().openSession();
// readAndSaveValue(session);
createAndSaveValue(session);
}
private static void createAndSaveValue(Session session){
Temp value=new Temp();
// value.setId(10);
value.setName("created name");
value.setTimeStamp(new Date());
System.out.println("Readed object:"+value);
session.beginTransaction();
session.save(value);
value.setTimeStamp(new Date());
session.getTransaction().commit();
System.out.println("Saved (1) object:"+value);
session.beginTransaction();
value.setTimeStamp(null);
session.update(value);
session.getTransaction().commit();
System.out.println("Saved (2) object:"+value);
value=(Temp)session.createCriteria(Temp.class).add(Restrictions.eq("id", value.getId())).uniqueResult();
System.out.println("Readed object:"+value);
/*
*
Readed object:Temp [id=null, name=created name, timeStamp=Wed Sep 28 22:22:04 EEST 2011]
Saved (1) object:Temp [id=200, name=created name, timeStamp=Wed Sep 28 22:22:04 EEST 2011]
Saved (2) object:Temp [id=200, name=created name, timeStamp=null]
Readed object:Temp [id=200, name=created name, timeStamp=null] */
}
private static void readAndSaveValue(Session session){
Temp value=(Temp)session.createCriteria(Temp.class).add(Restrictions.eq("id", 4)).uniqueResult();
System.out.println("Readed object:"+value);
session.beginTransaction();
value.setTimeStamp(new Date());
session.getTransaction().commit();
System.out.println("Saved (1) object:"+value);
session.beginTransaction();
value.setTimeStamp(null);
session.merge(value);
session.getTransaction().commit();
System.out.println("Saved (2) object:"+value);
value=(Temp)session.createCriteria(Temp.class).add(Restrictions.eq("id", 4)).uniqueResult();
System.out.println("Readed object:"+value);
/*
*
Readed object:Temp [id=4, name=4:value, timeStamp=null]
Saved (1) object:Temp [id=4, name=4:value, timeStamp=Wed Sep 28 22:13:36 EEST 2011]
Saved (2) object:Temp [id=4, name=4:value, timeStamp=null]
Readed object:Temp [id=4, name=4:value, timeStamp=null] */
}
}