Hello,

I've read the documentation about inheritance, but it's still dark for me. For instance, I'd like to write the Hibernate mapping files of the 3 following classes :



I want to store each concrete class (TypeCommande and TypeFacture) in a single table of the database (TYPECDE and TYPEFAC). The attribute code is my primary key.
As the CodeNom class is abstract, I don't need to store it in the database.

Can someone tell me what is the mapping file of this example ?

Thanks a lot

Just don't bother with the abstract class in your mapping and map the "common" properties in the 2 <class> mappings.

Hi

But I wonder how can I write the mapping of an object referencing and abstract class like this one :

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public class myObject {

private int id;
private String name;
private CodeNom codeNom;

public myObject() {
}

public int getId() {
return id:
}
public void setId(int id) {
this.id =id;
}

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

public CodeNom getCodeNom () {
return codeNom;
}
public void setCodeNom (CodeNom codeNom ) {
this.codeNom = codeNom;
}


}
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The attribute codeNom could be each an object TypeCommande, each an object TypeFacture.

How can I write the mapping if I didn't specify to hibernate the class CodeNom and just the two last concrete classes ?

you should use the "table per subclass" method described in the documentation.

In your case:



It's not very space efficient, but it allows you to have a FK reference to the CodeNom superclass.