Map class field to a flat representation

[Anonymous]

Hello,

I've been googling and trying different approaches for that but so far couldn't find a simple solution…
Problem is as follow:

class A {
 String test;
 B test2;
}
class B {
 String test3;
 String test4;
}
class C {
 String test;
 String test3;
 String test4;
}

Now I would like to map all of the fields from A (including B) to a flat representation in C.
Is it possible to do using just configuration? The problem is that class B is used in many places and I don't to write a mapping like this for each of them:

<mapping>
        <class-a>A</class-a>
        <class-b>C</class-b>
        <field>
            <a>test2.test3</a>
            <b>test3</b>
        </field>
        <field>
            <a>test2.test4</a>
            <b>test4</b>
        </field>
    </mapping>

Would appreciate a solution for that :)

[Anonymous]

Well ideally it could look like this:

    <mapping>
        <class-a>A</class-a>
        <class-b>C,D,E</class-b>
        <field>
            <a>test2</a>
        </field>
    </mapping>

Where D and E are different classes but consisting same fields as B + some additional