impossible a persister

salut,

je developpe sous netbean une petite application test qui consiste a persister 2 tables en relation one to many unidirectionnel dans une base de données derby embarquée.

voici le code source de ma table eleve :

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
package testjpa;
 
import java.io.Serializable;
import java.util.List;
import javax.persistence.*;
 
 
/**
 *
 * @author modde
 */
@Entity
@Table(name="eleve")
public class Eleve implements Serializable {
 
 
    private static final long serialVersionUID = 1L;
    @Id
    @Column(name="ideleve")
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    @Column(name="nom",nullable=false)
    private String nom="";
 
    @Column(name="prenom",nullable=false)
    private String prenom="";
 
    @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER,mappedBy="eleve")
    @JoinTable(name="note")
 
    private List<Note> note;
 
    public String getNom() {
        return nom;
    }
 
    public List<Note> getNote() {
        return note;
    }
 
    public String getPrenom() {
        return prenom;
    }
 
    public void setNom(String nom) {
        this.nom = nom;
    }
 
    public void setNote(List<Note> note) {
        this.note = note;
    }
 
    public void setPrenom(String prenom) {
        this.prenom = prenom;
    }
 
 
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }
 
    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Eleve)) {
            return false;
        }
        Eleve other = (Eleve) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }
 
    @Override
    public String toString() {
        return "testjpa.Eleve[id=" + id + "]";
    }
 
}

le code de ma table note :

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
package testjpa;
 
import java.io.Serializable;
import javax.persistence.*;
 
 
/**
 *
 * @author modde
 */
@Entity
@Table(name="note")
public class Note implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Column(name="idnote")
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    @Column(name="note")
    private String note="";
 
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinTable(name="eleve")
 
    private Eleve eleve;
 
    public Eleve getEleve() {
        return eleve;
    }
 
    public String getNote() {
        return note;
    }
 
    public void setEleve(Eleve eleve) {
        this.eleve = eleve;
    }
 
    public void setNote(String note) {
        this.note = note;
    }
 
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }
 
    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Note)) {
            return false;
        }
        Note other = (Note) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }
 
    @Override
    public String toString() {
        return "testjpa.Note[id=" + id + "]";
    }
 
}

voici le code pour la persistance :

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
package testjpa;
 
import java.util.ArrayList;
import java.util.List;
import javax.persistence.*;
/**
 *
 * @author modde
 */
public class Test {
 
 
    private EntityManager manager;
    private EntityManagerFactory factory;
 
 
    public Test(){
 
    }
 
    public void Start(){
 
        factory =Persistence.createEntityManagerFactory("Test");
        manager =factory.createEntityManager();
    }
 
    public void Stop(){
        manager.close();
        factory.close();
    }
 
    public void testPersistance() {
 
        manager.getTransaction().begin();
 
 
        List list =new ArrayList<Note>();
 
        Eleve eleve =new Eleve();
 
        eleve.setId(1L);
        eleve.setNom("Ozzy");
        eleve.setPrenom("Dente");
 
        Note note =new Note();
 
        note.setNote("15");
        note.setEleve(eleve);
 
        list.add(note);
 
        eleve.setNote(list);
 
        manager.persist(eleve);
 
       manager.flush();
        manager.getTransaction().commit();
        manager.getTransaction().rollback();
 
 
 
    }
 
}

l'erreur :

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run:
[EL Info]: 2010-03-22 22:48:41.258--ServerSession(15020576)--EclipseLink, version: Eclipse Persistence Services - 2.0.0.v20091127-r5931
[EL Info]: 2010-03-22 22:48:42.858--ServerSession(15020576)--file:/home/modde/NetbeanProjets/TestJpa/src/_Test login successful
[EL Warning]: 2010-03-22 22:48:43.417--ServerSession(15020576)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Table/View 'ELEVE' existe déjà dans Schema 'TEST'.
Error Code: 30000
Call: CREATE TABLE eleve (ideleve BIGINT NOT NULL, prenom VARCHAR(255) NOT NULL, nom VARCHAR(255) NOT NULL, eleve_ideleve BIGINT NOT NULL, Note_idnote BIGINT NOT NULL, PRIMARY KEY (ideleve, eleve_ideleve, Note_idnote))
Query: DataModifyQuery(sql="CREATE TABLE eleve (ideleve BIGINT NOT NULL, prenom VARCHAR(255) NOT NULL, nom VARCHAR(255) NOT NULL, eleve_ideleve BIGINT NOT NULL, Note_idnote BIGINT NOT NULL, PRIMARY KEY (ideleve, eleve_ideleve, Note_idnote))")
[EL Warning]: 2010-03-22 22:48:43.534--ServerSession(15020576)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Table/View 'NOTE' existe déjà dans Schema 'TEST'.
Error Code: 30000
Call: CREATE TABLE note (idnote BIGINT NOT NULL, note VARCHAR(255), PRIMARY KEY (idnote))
Query: DataModifyQuery(sql="CREATE TABLE note (idnote BIGINT NOT NULL, note VARCHAR(255), PRIMARY KEY (idnote))")
[EL Warning]: 2010-03-22 22:48:43.69--ServerSession(15020576)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Constraint 'ELEVE_NOTE_IDNOTE' existe déjà dans Schema 'TEST'.
Error Code: 30000
Call: ALTER TABLE eleve ADD CONSTRAINT eleve_Note_idnote FOREIGN KEY (Note_idnote) REFERENCES note (idnote)
Query: DataModifyQuery(sql="ALTER TABLE eleve ADD CONSTRAINT eleve_Note_idnote FOREIGN KEY (Note_idnote) REFERENCES note (idnote)")
[EL Warning]: 2010-03-22 22:48:43.814--ServerSession(15020576)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Table/View 'SEQUENCE' existe déjà dans Schema 'TEST'.
Error Code: 30000
Call: CREATE TABLE SEQUENCE (SEQ_NAME VARCHAR(50) NOT NULL, SEQ_COUNT DECIMAL(15), PRIMARY KEY (SEQ_NAME))
Query: DataModifyQuery(sql="CREATE TABLE SEQUENCE (SEQ_NAME VARCHAR(50) NOT NULL, SEQ_COUNT DECIMAL(15), PRIMARY KEY (SEQ_NAME))")
[EL Warning]: 2010-03-22 22:48:44.212--UnitOfWork(9015524)--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
Error Code: 20000
Call: INSERT INTO eleve (ideleve, prenom, nom) VALUES (?, ?, ?)
        bind => [1, Dente, Ozzy]
Query: InsertObjectQuery(testjpa.Eleve[id=1])
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
Error Code: 20000
Call: INSERT INTO eleve (ideleve, prenom, nom) VALUES (?, ?, ?)
        bind => [1, Dente, Ozzy]
Query: InsertObjectQuery(testjpa.Eleve[id=1])
        at org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:699)
        at testjpa.Test.testPersistance(Test.java:61)
        at testjpa.Main.main(Main.java:21)
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
Error Code: 20000
Call: INSERT INTO eleve (ideleve, prenom, nom) VALUES (?, ?, ?)
        bind => [1, Dente, Ozzy]
Query: InsertObjectQuery(testjpa.Eleve[id=1])
        at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:324)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:800)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:866)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:586)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:529)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeCall(AbstractSession.java:914)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:205)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:191)
        at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.insertObject(DatasourceCallQueryMechanism.java:334)
        at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:162)
        at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:177)
        at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.insertObjectForWrite(DatabaseQueryMechanism.java:461)
        at org.eclipse.persistence.queries.InsertObjectQuery.executeCommit(InsertObjectQuery.java:80)
        at org.eclipse.persistence.queries.InsertObjectQuery.executeCommitWithChangeSet(InsertObjectQuery.java:90)
        at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:286)
        at org.eclipse.persistence.queries.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:58)
        at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:675)
        at org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:589)
        at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:109)
        at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:86)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2863)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1225)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1207)
        at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1167)
        at org.eclipse.persistence.internal.sessions.CommitManager.commitNewObjectsForClassWithChangeSet(CommitManager.java:197)
        at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsForClassWithChangeSet(CommitManager.java:164)
        at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:116)
        at org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:3260)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1405)
        at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:547)
        at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithPreBuiltChangeSet(UnitOfWorkImpl.java:1551)
        at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.writeChanges(RepeatableWriteUnitOfWork.java:360)
        at org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:696)
        ... 2 more
Caused by: java.sql.SQLIntegrityConstraintViolationException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
        at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
        at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(Unknown Source)
        at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:791)
        ... 33 more
Caused by: java.sql.SQLException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
        at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
        ... 43 more
Caused by: ERROR 23502: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
        at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
        at org.apache.derby.impl.sql.execute.NormalizeResultSet.normalizeColumn(Unknown Source)
        at org.apache.derby.impl.sql.execute.NormalizeResultSet.normalizeRow(Unknown Source)
        at org.apache.derby.impl.sql.execute.NormalizeResultSet.getNextRowCore(Unknown Source)
        at org.apache.derby.impl.sql.execute.DMLWriteResultSet.getNextRowCore(Unknown Source)
        at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown Source)
        at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
        at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
        ... 37 more
Java Result: 1
BUILD SUCCESSFUL (total time: 7 seconds)

le probleme principal :

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Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: La colonne 'ELEVE_IDELEVE' ne peut pas accepter de valeur NULL.
Error Code: 20000

je ne sais pourquoi que j'ai cette erreur .

merci