[castor-dev] Re:[castor-dev] org.exolab.castor.persist.RelationCollection and ClassCastException with jdk1.4.2.01

[SYLVIE PALLUEL]

Hello,

I tried to determine where the problem comes from and I found the
following thing :

In jdk 1.3, the method ArrayList.addAll(Collection c) is this :

    public boolean addAll(Collection c) {
        modCount++;
        int numNew = c.size();
        ensureCapacity(size + numNew);

        Iterator e = c.iterator();
        for (int i=0; i<numNew; i++)
            elementData[size++] = e.next();

        return numNew != 0;
    } 

And the call to RelationCollection class is made by e.next(), and gets
the right object from the lazy collection.


In jdk 1.4, the method ArrayList.addAll(Collection c) is this :

    public boolean addAll(Collection c) {
        Object[] a = c.toArray();
        int numNew = a.length;
        ensureCapacity(size + numNew);  // Increments modCount
        System.arraycopy(a, 0, elementData, size, numNew);
        size += numNew;
        return numNew != 0;
    }

And the call to RelationCollection class is made by c.toArray();

    public Object[] toArray() {
        Object[] result = new Object[size()];
        Iterator itor = iterator();

        while ( itor.hasNext() ) {
            result = (Object[])itor.next();
        }
        return result;
    }

But on itor.next() we retrieve an element of the lazy collection, but
not a Object[] .

So I've got the class cast exception.

Is there something I can do ?

Sylvie.
___________________
CREDI RA
Sylvie Palluel

[EMAIL PROTECTED]
___________________



-----Message d'origine-----
De : SYLVIE PALLUEL [mailto:[EMAIL PROTECTED] 
Envoy� : vendredi 14 novembre 2003 08:54
� : [EMAIL PROTECTED]
Objet : [castor-dev] org.exolab.castor.persist.RelationCollection and
ClassCastException with jdk1.4.2.01


Hello,

Since now I was using jdk 1.3.1. And I have no special problem.

Then I'm using jdk 1.4.2.01.

I have the class "profilMetier" which is a persistent class with
"listeHabilitation" as lazy attribut 

  /**
   * Collection regroupant les r�f�rences aux habilitations rattach�es �
ce profil
   * @field-type
fr.cnam.scapin.metier.donnees.agents.profils.Habilitation
   * @lazy
   * @many-key idProfil
   */
  private java.util.Collection listeHabilitation;

  public java.util.Collection getListeHabilitation() {
    return listeHabilitation;
  }


Somewhere in my code I try to do this :

        ArrayList listeTriee = new ArrayList();
        listeTriee.addAll(profilMetier.getListeHabilitation());

And then I have this error :

549512 [Thread-5] ERROR exception.ApplicationException  - Message =
error.transaction.rollback - nestedException =
java.lang.ClassCastException java.lang.ClassCastException
        at
org.exolab.castor.persist.RelationCollection.toArray(RelationCollection.
java:405)
        at java.util.ArrayList.addAll(ArrayList.java:434)
        at
fr.cnam.scapin.metier.impl.agents.ProfilBeanImpl.getBean(ProfilBeanImpl.
java:146)
        at
fr.cnam.scapin.commun.ServeurDeBean.getBean(ServeurDeBean.java:89)


RelationCollection :

    public Object[] toArray() {
        Object[] result = new Object[size()];
        Iterator itor = iterator();

        while ( itor.hasNext() ) {
            result = (Object[])itor.next();   <--- line 405
        }
        return result;
    }

Do I need to update a library ? Or have I made a mistake ?


Thanks for your help.

Sylvie.
___________________
CREDI RA
Sylvie Palluel
 
[EMAIL PROTECTED]
___________________





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