Hi,
I have an issue with binding and class inheritance. Take the classes
public class A
{
private int a;
}
public class B extends A
{
int b;
}
and the binding file
<binding>
<mapping name="data" class="A">
<value name="a" field="a"/>
</mapping>
<mapping name="data" class="B" extends="A">
<structure map-as="A"/>
</mapping>
</binding>
- The mapping for A isn't abstract because I need to create concrete
instances of both A and B.
- Class B adds data when extending A but this data does not play any
part in marshalling/unmarshalling.
- The top level element for both A and B is 'data'.
Now I unmarshal the XML
<?xml version=\"1.0\" encoding=\"UTF-8\"?><data><a>24</a></data>
when I pass A.class to the getFactory method in preparation for
unmarshalling, all works as expected. When I pass B.class to the
getFactory method in preparation for unmarshalling, the unmarshalling
method returns an object of class A (not class B).
This does not seem correct. I'm not sure if giving two mappings the same
name is allowed. In the real situation I derived this example from I
need to use the same top level element. Anyone have any idea what is
going on, or what I am doing wrong?
The above was my attempt to get round a limitation with inheritance.
Namely, if class B extends class A, and I have a defined binding for
class A, then I want to be able to marshal/unmarshal objects of class B
implicitly. That is, when I marshal B the run-time would look at class
B, see it doesn't have any binding information, but notice superclass A
does so just use A. I am not familiar with the inner workings of JiBX so
that may be a big ask. Is it a feasible extension?
Thanks,
Paul
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