CODEWITHSUNDEEP
xmljaxb
David Herod
David Herod

Reputation: 794

JAXB more than one possible root element

I need to bind an XML response using JAXB. however, there are two possible responses, either the success XML or error XML. So, I need a way to receive either one. Below are two sample XML files. I'd appreciate it, if anyone could help me with this. I've been looking everywhere how to do achieve to good solution! Thanks!!

Successful response:

<?xml version="1.0" encoding="UTF-8"?>
<ResponseEnvioComandoSpy>
<comandoSpy>
<id>5</id>
<status>4</status>
<erro>0</erro>
</comandoSpy>
</ResponseEnvioComandoSpy>

Error response

<ErrorRequest>
<codigo>14</codigo>
<erro>Nenhum comando/macro a ser enviada, favor verificar as tags xml.</erro>
<request>EnvioComando</request>
</ErrorRequest>

Upvotes: 1

Views: 2968

Answers (2)

David Herod
David Herod

Reputation: 794

Well thanks to Blaise's tutorial http://blog.bdoughan.com/2012/07/jaxb-and-root-elements.html ive managed to solve my problem. The solution was to implement an object factory with the classes of both xml's. Heres the code below. 

public static void main(String[] args) throws JAXBException, MalformedURLException, IOException {
    RequestMensagemCB requestMensagemCB = new RequestMensagemCB();
    XMLBinder xmlBinder = new XMLBinder();
    InputStreamReader isr = Request.doPost(url, xmlBinder.marshaller(requestMensagemCB));


    JAXBContext jc = JAXBContext.newInstance(ObjectFactory.class);
    Unmarshaller unmarshaller = jc.createUnmarshaller();

    Object object = (Object) unmarshaller.unmarshal(isr);
    Marshaller marshaller = jc.createMarshaller();
    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
    marshaller.marshal(object, System.out);
}

@XmlRegistry
public class ObjectFactory {

public ObjectFactory() {
}

public ResponseMensagemCB createResponseMensagemCB() {
    return new ResponseMensagemCB();
}

public ErrorRequest createErrorRequest() {
    return new ErrorRequest();
}
}

Upvotes: 0

bdoughan
bdoughan

Reputation: 149047

You can use the @XmlElementDecl on a class annotated with @XmlResistry (usually ObjectFactory for this use case)

Upvotes: 1

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