Spring Data REST convert/show EmbeddedId including ManyToOne - spring

Question

I have a question for my project in Spring Data REST.
My model includes two tables with EmbeddedIds.
The first table (name=B) consist of two integers.
The second table (name=A) consist of a simple FK and the model of B (includes the EmbeddedId).
Now, if I make a request for table B, I'll get the two IDs.
However, if I make a request for table A, I wont get the IDs..
So I overrid the toString()-method in my EmbeddedId-class, to return at least the IDs right in the URI-link.
I read about BackendIdConverter or Spring core.converter and tried to convert the IDs right, but I wasn't able to reach my goal (got errors). So now, I need your help!
To fully understand my problem, here's my structure (as demo):
#Embeddable
public class IDsFromA implements Serializable {
#ManyToOne
#JoinColumn(name="cID")
private C c;
#ManyToOne
#JoinColumns({
#JoinColumn(name="b_1", referencedColumnName="b_1"),
#JoinColumn(name="b_2", referencedColumnName="b_2")
})
private B b;
}
#Embeddable
public class IDsFromB implements Serializable {
private int b_1;
private int b_2;
}
#Entity
public class A {
#EmbeddedId
private IDsFromA idsFromA;
// ...
}
#Entity
public class B {
#EmbeddedId
private IDsFromA idsFromA;
// ...
}
#Entity
public class c {
#Id
private int cID;
// ...
}

Answer 1

The Jackson JSON serializer will by default also serialize any public get..() methods. So you can simply add a couple of methods to return the relevant data and the values should be in the response:
e.g.
#Entity
public class A {
#EmbeddedId
private IDsFromA idsFromA;
public int getValueOne(){
return idsFromA.getB().getIdsFromB().getB_1();
}
public int getValueTwo(){
return idsFromA.getB().getIdsFromB().getB_2();
}
}