Hi Friends,
I have been struggling to get through one-to-many association for my simple case of associating User with Qualification(s).

I have overridden hashCode and equals methods and my mapping looks as below.

<hibernate-mapping package="dto.user">
<class name="User" table="user">
<id
column="userid"
name="userid"
type="string"
>
<generator class="assigned" />
</id>

. . . . . . .

<set name="qualifications"
cascade="all-delete-orphan"
>
<key column="userid" />
<one-to-many class="Qualification" />
</set>

<many-to-one name="address" class="Address"
column="addressid"
cascade="all"
/>
</class> </hibernate-mapping>


My Qualification.hbm.xml is:

<hibernate-mapping package="dto.user">
<class name="Qualification" table="qualification">
<id
column="qualificationid"
name="qualificationid"
type="integer"
>
<generator class="native" />
</id>
. . . . .

<many-to-one
class="User"
name="user"
not-null="true"
>
<column name="userid" />
</many-to-one>
</class>
</hibernate-mapping>

I have declared a Set in my User object with both getter and setter methods.

I want to have User -> Qualifications association (one-to-many) so that I would be able to get all Qualifications of a particular user.

Please throw some light on this energy sapping problem.

Thanks and Regards,
Aru K

And what's the problem?

I think that you forgot a very impotant thing:

the description of your problem

Im very sorry for not stating my problem. Sorry again friends!!!!

Problem
=======
I couldnt have my sessionFactory created using these hbm files. I get no exception when I use the following code, and I get no Factory too. ie,

try{
Configuration cfg=new Configuration();
System.out.println("About to build session factory....");
factory=cfg.configure().buildSessionFactory(); //// this line is not executed or even throws exception as would normally if something went wrong

System.out.println("Session Factory is :"+factory);
if(factory!=null)
{
getServletContext().setAttribute("FACTORY",factory);
System.out.println("Session factory is kept in application context (NEW STYLE-WORKING WELL)");
}
}catch(Exception e)
{
System.out.println("EXCEPTION while trying to store in application context :"+e);
}


In this code, I get no exception as well as dont get Session factory too. My program doesnt throw even an exception. Once it printed 'About to build session factory.. it ignores the rest.

But if I remove the <set > tag from User.hbm.xml file, it creates sessionFactory well.

Please help.

There is no way you get null as factory after this code. It should definitely 'say' (throw) something.

Thanks for your comment.

But it is 100% sure that it doesnt throw any exception.

I actually use this code in a servlet's (which gets initialized when appln starts up) init() method.

I even dont get null. Its really frustrating... Plz help.

So if you don't get null, what do you get then??

As I have said previously, execution gets break and ignores the code starting from

factory=cfg.configure().buildSessionFactory(); //// this line is not executed or even throws exception as would normally if something went wrong


That is, system doesnt execute or does something when executing this line without causing an exception. Rest of lines are simply ignored.

To make sure that it really parses my hbm files, I did remove <set> tag from User.hbm.xml file. Then it went on to create factory and saving it in appln. context for my use.

Try catching Throwable.