Persistance de données en JPA

Salut,

je suis entrain de réaliser une application sous forme d'un répertoire téléphonique, ou on sauvegarde des contact (numéro de téléphone(mobile,fixe ou fax), adresse, mail +des informations supplémentaires) en donnant la possibilité de classer les contacts dans des groupes.

j'ai les classes : Contact, EntrepriseContact (qui hérite de la classe Contact), PhoneNumber, Group et Address.

Contact.java

import java.util.ArrayList;
import java.util.List;
import javax.persistence.*;


@Entity
@Table(name = "contact")
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "Type")@DiscriminatorValue("contact") @SuppressWarnings("SerializableClass")

public class Contact {
     @Id
    @Column(name = "id")
    protected int id;
    protected String firstName;
    protected String lastName;
    protected String email;
    @Embedded
    protected Address rAddress;
    @OneToMany(mappedBy = "rContact" , cascade = CascadeType.ALL)
    protected List<PhoneNumber> rPhoneNumber;
    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "contact_groupe",joinColumns=@JoinColumn(name = "id_contact"),
     inverseJoinColumns= @JoinColumn(name = "id_group"))
    protected List<Group> rGroup;

    public Contact() {
        rPhoneNumber = new ArrayList<>();
        rGroup = new ArrayList<>();
    }
     public Contact(int id, String firstName, String lastName, String email) {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
        this.email = email;
        rPhoneNumber = new ArrayList<>();
        rGroup = new ArrayList<>();
    }
         public String getName(){
        return firstName + " " + lastName.toUpperCase();
    }
     public int getId() {
        return id;
    } 
    public void setId(int id) {
        this.id = id;
    }
     public String getFirstName() {
        return firstName;
    }
     public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
     public String getLastName() {
        return lastName;
    }
     public void setLastName(String lastName) {
        this.lastName = lastName;
    }
     public String getEmail() {
        return email;
    }
     public void setEmail(String email) {
        this.email = email;
    }
     //    ------------- Address ------------------
     public Address getrAddress() {
        return rAddress;
    }
     public void setrAddress(Address rAddress) {
        this.rAddress = rAddress;
    }
    public void addAddress(Address a){
    setrAddress(a);
    }
     //    ------------- PhoneNumber ------------------
     public List<PhoneNumber> getrPhoneNumber() {
        return rPhoneNumber;
    }
     public void setrPhoneNumber(ArrayList<PhoneNumber> rPhoneNumber) {
        this.rPhoneNumber = rPhoneNumber;
    }
         public void addPhoneNumber(PhoneNumber p){
                 if( !rPhoneNumber.contains(p) ){
            if (p.getrContact() != null)
                    p.getrContact().getrPhoneNumber().remove(p);
            p.setrContact(this);
            rPhoneNumber.add(p);
        }
    }
     //    ------------- Group ------------------
     public List<Group> getrGroup() {
        return rGroup;
    }
     public void setrGroup(ArrayList<Group> rGroup) {
        this.rGroup = rGroup;
    }
     public void addGroup(Group g){
        if( !rGroup.contains(g) ){
            g.getrContact().add(this);
            rGroup.add(g);
        }
    }

     @Override
    public boolean equals(Object obj) {
        return this.id == ((Contact) obj).id;
    }

     @Override    public int hashCode() {
        int hash = 5;
        hash = 29 * hash + this.id;
        return hash;
    }

     @Override
    public String toString() {
        return getName();
    }
          }

Address.java

import javax.persistence.*;

@Embeddable
@SuppressWarnings("SerializableClass")
public class Address {

    @Transient
    private int id;

    private String street;
    private String city;
    private String zipCode;
    private String country;

    public Address() {
    }

    public Address(int id, String street, String city, String zipCode, String country) {
        this.id = id;
        this.street = street;
        this.city = city;
        this.zipCode = zipCode;
        this.country = country;
    }

    public int getId() {
        return id;
    }

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

    public String getStreet() {
        return street;
    }

    public void setStreet(String street) {
        this.street = street;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getZipCode() {
        return zipCode;
    }

    public void setZipCode(String zipCode) {
        this.zipCode = zipCode;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    @Override
    public boolean equals(Object obj) {
        if(obj instanceof Address)
            return this.id == ((Address) obj).id; 
        else   
            return super.equals(obj);
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 79 * hash + this.id;
        return hash;
    }

    @Override
    public String toString() {
        return street + ", " + city + " " + zipCode + ", " + country;
    }


}

EntrepriseContact.java

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import javax.persistence.*;

@Entity
@DiscriminatorValue("entreprise_contact")
@SuppressWarnings("SerializableClass")
public class EntrepriseContact extends Contact {

    public static final String ENTREPRISE_KIND_SARL = "SARL";
    public static final String ENTREPRISE_KIND_EURL = "EURL";
    public static final String ENTREPRISE_KIND_SNC = "SNC";
    public static final String ENTREPRISE_KIND_SCS = "SCS" ;
    public static final String ENTREPRISE_KIND_SCA = "SCA" ;  

    private String SIRET;
    private String denomination;
    private String entrepriseKind;
    @Temporal(javax.persistence.TemporalType.DATE)
    private Date creationDate;
    private String activity;
    private double shareCapital;

    public EntrepriseContact() {
    }

    public EntrepriseContact(int id, String firstName, String lastName, String email, 
            String SIRET, String denomination, String entrepriseKind, 
            Date creationDate, String activity, double shareCapital ) {

        super(id, firstName, lastName, email);

        this.SIRET = SIRET;
        this.denomination = denomination;
        this.entrepriseKind = entrepriseKind;
        this.creationDate = creationDate;
        this.activity = activity;
        this.shareCapital = shareCapital;
    }

    @Override
    public String getName() {

        return denomination + " " + entrepriseKind + " (" + super.getName() + ")"; //To change body of generated methods, choose Tools | Templates.
    }

    public String getSIRET() {
        return SIRET;
    }

    public void setSIRET(String SIRET) {
        this.SIRET = SIRET;
    }

    public String getDenomination() {
        return denomination;
    }

    public void setDenomination(String denomination) {
        this.denomination = denomination;
    }

    public String getEntrepriseKind() {
        return entrepriseKind;
    }

    public void setEntrepriseKind(String entrepriseKind) {
        this.entrepriseKind = entrepriseKind;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public String getActivity() {
        return activity;
    }

    public void setActivity(String activity) {
        this.activity = activity;
    }

    public double getShareCapital() {
        return shareCapital;
    }

    public void setShareCapital(double shareCapital) {
        this.shareCapital = shareCapital;
    }

    @Override
    public boolean equals(Object obj) {
        return this.id == ((Contact) obj).id; 
    }

    @Override
    public String toString() {

        // Set your date format
        SimpleDateFormat sdf = new SimpleDateFormat("dd MMMM yyyy", Locale.ENGLISH); 

        // Get Date String according to date format (12 March 1970)
        String formatedDate = sdf.format(creationDate);

        return getName() + ", since " + formatedDate;
    }   
}

PhoneNumber.java

import javax.persistence.*;

@Entity
@Table(name = "phone_number")
@SuppressWarnings("SerializableClass")
public class PhoneNumber {
    @Id
    @Column(name = "id")
    private int id;
    private String phoneKind;
    private String number;

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "id_contact")
    private Contact rContact;

    public PhoneNumber() {
    }

    public static final String PHONE_FIX = "FIX";
    public static final String PHONE_MOBILE = "MOBILE";
    public static final String PHONE_FAX = "FAX";

    public PhoneNumber(int id, String phoneKind, String number) {
        this.id = id;
        this.phoneKind = phoneKind;
        this.number = number;
    }

    public int getId() {
        return id;
    }

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

    public String getPhoneKind() {
        return phoneKind;
    }

    public void setPhoneKind(String phoneKind) {
        this.phoneKind = phoneKind;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    //    ------------- Contact ------------------

    public Contact getrContact() {
        return rContact;
    }

    public void setrContact(Contact rContact) {
        this.rContact = rContact;
    }

    public void addContact(Contact c){
        if(!c.getrPhoneNumber().contains(this)){
            if (rContact != null)
                rContact.getrPhoneNumber().remove(this); 
            this.setrContact(c);
            c.getrPhoneNumber().add(this); 
        }  
    }

    @Override
    @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
    public boolean equals(Object obj) {
        return this.id == ((PhoneNumber) obj).id; 
    }

    @Override
    public int hashCode() {
        int hash = 3;
        hash = 97 * hash + this.id;
        return hash;
    }

    @Override
    public String toString() {
        // Ex: (MOBILE) 0661123456
        return "(" + phoneKind + ") " + number; 
    }

}

Group.java

import java.util.ArrayList;
import java.util.List;
import javax.persistence.*;

@Entity
@Table(name = "groupe")
@SuppressWarnings({"SerializableClass", "ValidPrimaryTableName"})
public class Group {

    @Id
    @Column(name = "id")
    private int id;
    private String groupName;

    @ManyToMany(mappedBy = "rGroup",cascade = CascadeType.ALL)
    private List<Contact> rContact;

    public Group() {
        rContact = new ArrayList<>();
    }

    public Group(int id, String groupName) {
        this.id = id;
        this.groupName = groupName;
        rContact = new ArrayList<>();
    }

    public double getGroupShareCapital(){

        double groupShareCapital = 0;
        for (Contact c : rContact) {
            if(c instanceof EntrepriseContact)
                groupShareCapital += ((EntrepriseContact)c).getShareCapital();
        }
        return groupShareCapital;
    }

    public int getId() {
        return id;
    }

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

    public String getGroupName() {
        return groupName;
    }

    public void setGroupName(String groupName) {
        this.groupName = groupName;
    }

    //    ------------- Contact ------------------

    public List<Contact> getrContact() {
        return rContact;
    }

    public void setrContact(List<Contact> rContact) {
        this.rContact = rContact;
    }

    public void addContact(Contact c){
        if( !rContact.contains(c) ){
            c.getrGroup().add(this);
            rContact.add(c); 
        }
    }

    @Override
    public boolean equals(Object obj) {
        return this.id == ((Group) obj).id; 
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 97 * hash + this.id;
        return hash;
    }

}

Voici aussi le diagramme de classe et le modèle de domaine :



le fichier de persistance xml est le suivant :

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence https://www.oracle.com/java/technologies/   
    <persistence-unit name="carnet-unit">

    <class>bda.tp5.jpa.Group</class>
    <class>bda.tp5.jpa.PhoneNumber</class>
    <class>bda.tp5.jpa.Contact</class>
    <class>bda.tp5.jpa.Address</class>
    <class>bda.tp5.jpa.EntrepriseContact</class>


    <properties>
      <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
      <property name="hibernate.connection.url" value="jdbc:mysql://localhost/bda_tp5_carnet"/>
      <property name="hibernate.connection.username" value="root"/>
      <property name="hibernate.connection.password" value=""/>
      <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
      <property name="hibernate.show_sql" value="true"/>
      <property name="hibernate.hbm2ddl.auto" value="create"/>
    </properties>

  </persistence-unit>
</persistence>

Afin de tester le truc on essay de persister trois contact(ali,karim et Farouk) avec leurs informations...

import java.util.Date;
import javax.persistence.*;

public static void main(String[] args) {

        //Creer la connection :
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("carnet-unit");

        EntityManager em = emf.createEntityManager();

        //creer une transaction :
        EntityTransaction tx = em.getTransaction();

        Contact ali = new Contact(1, "Ali", "Benmostafa", "ali.benmostafa@gmail.com");

        Contact sntf = new EntrepriseContact(2, "Farouk", "Souleymen", "farouk.souleymen@sntf.dz", 
                "01234567890123", "SNTF", EntrepriseContact.ENTREPRISE_KIND_SNC,
                new Date(76,2,26), "Transport ferroviaire",  2070100.00);

        Contact karim = new Contact(3, "Karim", "Boualam", "karim.boualam@hotmail.com");

//      --------------------------------------------------------------

        ali.addAddress(new Address(1, "87, Ali Mendjeli", "Constantine", "25000", "Algeria"));

        sntf.addAddress(new Address(1, "21,23 Boulevard Mohamed V", "Alger", "16000", "Algeria"));

//      --------------------------------------------------------------

        ali.addPhoneNumber(new PhoneNumber(1, PhoneNumber.PHONE_FIX, "031123456"));
        ali.addPhoneNumber(new PhoneNumber(2, PhoneNumber.PHONE_MOBILE, "0770123456"));

        sntf.addPhoneNumber(new PhoneNumber(3, PhoneNumber.PHONE_FIX, "021711510"));
        sntf.addPhoneNumber(new PhoneNumber(4, PhoneNumber.PHONE_FAX, "021633934"));

        karim.addPhoneNumber(new PhoneNumber(5, PhoneNumber.PHONE_MOBILE, "0661123456"));


        Group groupFootball = new Group(1, "CSC");
        groupFootball.addContact(ali);
        groupFootball.addContact(karim);

        Group groupJob = new Group(1, "Agence");
        ali.addGroup(groupJob);
        groupJob.addContact(sntf);

            tx.begin();

            em.persist(ali);
            em.persist(karim);
            em.persist(sntf);

            tx.commit();

        em.close();
        emf.close();
}

Mais le problème c'est que dans ma base de donnée je ne voix que Ali et Karim !!

La table entreprise_contact est toujours vide :(

Que dois-je faire??

PS: aucune exception n'est lancée, le programme s'execute sans aucune erreur -_-