I'm trying to deserialize xml string with library JAXB to specific class.
public class Sandbox {
public static void main(String[] args) throws JAXBException {
String xml = "<root><child><base-value>val1</base-value><baseimpl-value>val2</baseimpl-value></child></root>";
Sandbox.Do(xml, BaseImpl.class);
}
public static void Do(String xml, Class c) throws JAXBException{
JAXBContext jc = JAXBContext.newInstance(Parent.class, c);
Unmarshaller um = jc.createUnmarshaller();
Parent<BaseImpl> p = (Parent<BaseImpl>) um.unmarshal(new StringReader(xml));
System.out.println(p.child);
}
}
@XmlRootElement(name = "root")
class Parent<T extends Base> {
@XmlElement
T child;
}
abstract class Base {
@XmlElement(name = "base-value")
String BaseValue;
}
@XmlRootElement
class BaseImpl extends Base {
@XmlElement(name = "baseimpl-value")
String BaseImplValue;
@Override
public String toString(){
return super.BaseValue + ", " + this.BaseImplValue;
}
}
JAXB is trying to initiliaze Base
interface, what fail with exception Unable to create an instance of sandbox.Base...
event though class name is passed to JAXBContext.newInstance
function.
I spent another few hours cursing over Jaxb and finally found solution for my problem. The thing, which is missing is param name
in annotation at @XmlRootElement(name = "child")
. That's all I needed, everything works just fine.
Hope someone will find this helpful and save his time.
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