[Xstream] Problème désérialisation avec xstream et les annotations

Bonjour,

J'utilise xstream pour sérialiser et désérialiser mes objetc, cependant j'ai un problème lors de la désérialisation concernant mes objets qui héritent d'une autre classe :

Code:

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@XStreamAlias("A")
public class TypeA { private String attrA = "testA"; }
 
@XStreamAlias("B")
public class TypeB extends TypeA { private String attrB = "testB"; }
 
@XStreamAlias("Ct")
public class TypeC extends TypeB { private String attrC = "testC"; }

et j'obtiens cette erreur :

Code:

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com.thoughtworks.xstream.converters.ConversionException: b : b
---- Debugging information ----
message : b : b
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message : b : b
class : com.test.TypeC
required-type : com.test.TypeC
path : /test/b
-------------------------------
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:63)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117)
at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:29)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:832)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:819)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:767)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:759)...

Merci de votre aide.