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POMarshalling polymorphic objects in JAX-WS
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  1. POMarshalling polymorphic objects in JAX-WS
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    copied!<p>I'm creating a JAX-WS type webservice, with operations that return an object WebServiceReply. The class WebServiceReply itself contains a field of type Object. The individual operations would populate that field with a few different data-types, depending on the operation.</p> <p>Publishing the WSDL (I'm using Netbeans 6.7), and getting a ASP.NET application to retrieve and parse the WSDL was fine, but when I tried to call an operation, I would receive the following exception:</p> <pre><code>javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException - with linked exception: [javax.xml.bind.JAXBException: class [LDataObject.Patient; nor any of its super class is known to this context.] </code></pre> <p>How do I mark the annotations in the DataObject.Patient class, as well as the WebServiceReply class to get it to work? I haven't been able to fine a definitive resource on marshalling based upon annotations within the target classes either, so it would be great if anybody could point me to that too.</p> <h2>WebServiceReply.java</h2> <pre><code>@XmlRootElement(name="WebServiceReply") public class WebServiceReply { private Object returnedObject; private String returnedType; private String message; private String errorMessage; .......... // Getters and setters follow } </code></pre> <h2>DataObject.Patient.java</h2> <pre><code>@XmlRootElement(name="Patient") public class Patient { private int uid; private Date versionDateTime; private String name; private String identityNumber; private List&lt;Address&gt; addressList; private List&lt;ContactNumber&gt; contactNumberList; private List&lt;Appointment&gt; appointmentList; private List&lt;Case&gt; caseList; } </code></pre> <hr> <h2>Solution</h2> <p>(Thanks to <a href="https://stackoverflow.com/questions/1163795/marshalling-polymorphic-objects-in-jax-ws/1164187#1164187">Gregory Mostizky</a> for his answer)</p> <p>I edited the WebServiceReply class so that all the possible return objects extend from a new class ReturnValueBase, and added the annotations using @XmlSeeAlso to ReturnValueBase. JAXB worked properly after that!</p> <p>Nonetheless, I'm still learning about JAXB marshalling in JAX-WS, so it would be great if anyone can still post any tutorial on this.</p> <p>Gregory: you might want to add-on to your answer that the return objects need to sub-class from ReturnValueBase. Thanks a lot for your help! I had been going bonkers over this problem for so long! </p>
 

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