java - Simple XML framework - convert inherited classes with a single Converter -

i using simplexml framework. have 3 classes, b , c extends a:

classes:

public class { } public class b extends { } public class c extends { } 

i can register converter class a:

seriailization:

registry registry = new registry(); registry.bind(a.class, aconverter.class); strategy strategy = new registrystrategy(registry); serializer serializer = new persister(strategy); 

converter:

public class aconverter implements converter<a> { @override public read(inputnode n) throws exception {     // todo auto-generated method stub     return null; } @override public void write(outputnode n, p) throws exception {     // todo auto-generated method stub } } 

problem: aconverter used class (not classes b , c).

how possible register aconverter instances of class (i.e. b , c) ?

note: think combination of (matcher & transform) not case because need many inner blocks inside of ... in future.

have tried

registry.bind(a.class, aconverter.class); registry.bind(b.class, aconverter.class); registry.bind(c.class, aconverter.class);