in my Persistent/distributed framework, I need to define link between objects using Interface object, because the construction of my objects are made by NHibernate, or by my entityManager which dynamically create a proxy to a distant server.

So, my POJO object is like this:

interface IPlayer { ... }

class Player:IPlayer
{
private ITeam team;
}

interface ITeam { .... }
class Team:ITeam
{
private IList<IPlayer> players;
}

and in my configuration, something like this:

<class
name='Player'>
<id> etc...
</id>
<many-to-one
name='Team'
access='field'
outer-join='true' />
</class>

when I load configuration using this code:

System.IO.FileStream stream = new System.IO.FileStream("mapping.hbm.xml", System.IO.FileMode.Open);
cfg.AddInputStream(stream);

everything is good, but when I wrote this:

ISessionFactory factory=cfg.BuildSessionFactory();

I've got an exception like this:

NHibernate.MappingException:An association from the table Player refers to an unmapped class:ITeam

it's not a problem in configuration file, because i don't refer to any interface;

so, what can I do?

Hello,

You have to write mapping for your 'Team' class too,

since you have given like this

<many-to-one
name='Team'
access='field'
outer-join='true' />

so, you have give mapping for this too, and for the above add class constraint as 'Team' so its look like

<many-to-one name='team' class='Team'
access='field'
outer-join='true' />

POJO = Plain Ordinary (Old) Java Object

so your .NET classes can not be called POJO.

I suppose this remark change completely the question ;-)

did you say in .NET PONO or POCO?

Personally, I've just heard POCO used.