[ouafaa]

hello,
im new in EJB/hibernate developement.
i work with myeclipse/Hibernate to develop a web application with mysql database.
i created the mapping.
when i created a client class to insert something in database i have this NullPointerException
any help will be appreciated.

this is my table

create table ANNEE
(
   ID_AN                          int                   not null auto_increment,
   AN                             int                   not null,
   primary key (ID_AN)
)
type = InnoDB;

this table is one to many related to an other table periodes:

create table PERIODE
(
   ID_PERIODE                     int                   not null   auto_increment,
   ID_AN                          int                   not null,
   NOM_PERIODE                    varchar(30)                    not null,
   primary key (ID_PERIODE)
)
type = InnoDB;

the class created is :

import java.util.HashSet;
import java.util.Set;

/**
 * Annee generated by MyEclipse - Hibernate Tools
 */

public class Annee  implements java.io.Serializable {

     private Integer idAn;
     private Integer an;
     private Set periodes = new HashSet(0);

    /** default constructor */
    public Annee() {
    }

    /** minimal constructor */
    public Annee(Integer an) {
        this.an = an;
    }
    
    /** full constructor */
    public Annee(Integer an, Set periodes) {
        this.an = an;
        this.periodes = periodes;
    }

   
    // Property accessors

    public Integer getIdAn() {
        return this.idAn;
    }
    
    public void setIdAn(Integer idAn) {
        this.idAn = idAn;
    }

    public Integer getAn() {
        return this.an;
    }
    
    public void setAn(Integer an) {
        this.an = an;
    }

    public Set getPeriodes() {
        return this.periodes;
    }
    
    public void setPeriodes(Set periodes) {
        this.periodes = periodes;
    }

the client class is

import org.hibernate.*;
import org.hibernate.cfg.*;


public class AjoutAnnee {
    public static void main( String [] argv) throws Exception, MappingException,
          HibernateException
{
Transaction tx=null;
Session session=null;
try
{
Configuration cfg = new Configuration().addClass(Annee.class);

SessionFactory sessionFactory =   cfg.buildSessionFactory();
// ouverture de la session
session =sessionFactory.openSession();
// Creation d'un user

tx = session.beginTransaction();
org.apache.log4j.BasicConfigurator.configure();

Annee util1=new Annee();
// on peuple l'objet Annee
// mais pas la clé primaire, qui nous sera retournée par session.save();
System.out.println("rrrr");
util1.setAn (2005);
//util1.setPeriodes (null);
session.save(util1);
tx.commit();

}

catch (Exception e) {
if (tx!=null) tx.rollback();
throw e;
}
finally {
session.close();
}

}

}

thank you in advance

[Riyad Kalla]

Moving to OT > Soft Dev

[Author]

Posts