OK thanks.
I only have this exception: java.lang.ClassCastException. So I don't have
lazy loading.
Coud you just confirm to me that, to implement lazy loading, for the
"Consultant" class I have to:
A- set "lazy" to "true", like this:
---------------
<class name="Consultant" identity="consID" key-generator="IDENTITY">
<map-to table="CONSULT"/>
...
<field name="grades" type="Grade" lazy="true" collection ="collection" >
<sql many-key="CONSID" />
</field>
</class>
---------------
B- and write my Consultant class like this:
---------------
public class Consultant {
...
private Collection grades = new ArrayList();
...
public Collection getGrades() {
return this.grades;
}
public void setGrades(Collection g) {
this.grades = g;
}
public void addGrade(Collection g) {
this.grades.add(g);
}
}
---------------
Thanks !
Alexandre
-----Message d'origine-----
De : Denis Sukhoroslov [mailto:[EMAIL PROTECTED]
Envoyé : vendredi 7 mars 2003 10:24
À : [EMAIL PROTECTED]
Objet : Re: [castor-dev] Lazy loading - how to be sure ?
An error skack should look like:
java.lang.RuntimeException: Transaction is closed!
at org.exolab.castor.persist.RelationCollection$IteratorImp.lazyLoad
..........................
----- Original Message -----
From: "Alexandre Hoang" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, March 07, 2003 11:58 AM
Subject: Re: [castor-dev] Lazy loading - how to be sure ?
> Hello,
>
> In order to check if my objects of the class "Consultant" are lazily
loaded,
> I have written this piece of code:
> ------------------
> QueryResults results = query.execute();
> Consultant cons = new Consultant();
> cons = (Consultant)results.next();
>
> Object[] objArray = cons.getGrades().toArray();
>
> Iterator it = cons.getGrades().iterator();
> while(it.hasNext()) {
> Grade g =(Grade)it.next();
> System.out.println(g.toString());
> }
> ------------------
> When I set lazy="false" in the mapping file, this piece of code is OK.
> When I set lazy="true", I have an exception with the line:
> "Object[] objArray = cons.getGrades().toArray();"
> Is it a reasonable piece of evidence that my "Consultant" objects are
lazily
> loaded ?
>
>
> Thanks,
>
> Alexandre
>
>
>
>
> -----Message d'origine-----
> De : Denis Sukhoroslov [mailto:[EMAIL PROTECTED]
> Envoyé : jeudi 6 mars 2003 18:04
> À : [EMAIL PROTECTED]
> Objet : Re: [castor-dev] Lazy loading - how to be sure ?
>
>
> Yes. If this collection is lazily loaded you should get an exception on
> line: Grade g =(Grade)it.next();
>
> ----- Original Message -----
> From: "Alexandre Hoang" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, March 06, 2003 7:09 PM
> Subject: [castor-dev] Lazy loading - how to be sure ?
>
>
> > Hello,
> >
> > Sorry for the dumb question, but I need to know...
> >
> > I have modified my "mapping.xml" file and my classes to enable lazy
> loading.
> > I can save my objects and load them correctly.
> > But is there a (simple) way I can verify that my objects are really
loaded
> > lazily ?
> > --------------
> > In this case, I have :
> >
> > cons = (Consultant)results.next();
> > Collection al = cons.getGrades();
> > Iterator it =al.iterator();
> > while(it.hasNext()) {
> > Grade g =(Grade)it.next();
> > System.out.println(g.getSkill());
> > }
> >
> > --------------
> > Thanks,
> >
> > Alexandre
> >
> >
> >
> >
> >
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