Doctrine 2 - How to have an association class with a mapped superclass? - php

Question

I'm having trouble with a Doctrine 2 mapped superclass, to define a ManyToMany Relation.
My code is :
use Doctrine\Common\Collections\ArrayCollection;
/** #MappedSuperclass */
abstract class MyAbstractClassA
{
/**
* #Id
* #GeneratedValue
* #Column(type="integer")
* #var int
*/
protected $id;
/**
* #ManyToMany(targetEntity="MyClassE")
* #var MyClassE[]
*/
protected $my_class_es;
// ... Other fields and methods
}
/** #Entity() */
class MyConcreteClassAa extends MyAbstractClassA
{
/**
* #Column(type="string")
* #var string
*/
public $aa_param;
// ... Other fields and methods
}
/** #Entity() */
class MyConcreteClassAb extends MyAbstractClassA
{
/**
* #Column(type="string")
* #var string
*/
public $ab_param;
// ... Other fields and methods
}
/** #Entity() */
class MyClassE
{
/**
* #Id
* #Column(type="integer")
* #var int
*/
protected $id;
/**
* #Column(type="string")
* #var string
*/
protected $e_param;
/**
* #ManyToOne(targetEntity="MyClassF")
* #var MyClassF
*/
protected $my_class_f;
// ... Other fields and methods
}
/** #Entity() */
class MyClassF
{
/**
* #Id
* #Column(type="integer")
* #var int
*/
protected $id;
// ... Other fields and methods
}
So here is the schema of what i have : http://pix.toile-libre.org/upload/original/1385651287.png
And there is what i want : http://pix.toile-libre.org/upload/original/1385651300.png
I don't know how to obtain this result, could someone tell me if it's possible ?
Thank you for helping me.