You logged this as a JIRA too right? This is scheduled to be looked at
for 2.3.4 that I hope to start work on soon. My queue is full at the
moment.
On 5/13/12 11:22 PM, Jim Stafford wrote:
> I am encountering an error while demarshalling a JSON object as input
> to a JAX-RS method. After some tinkering, the error seems to be due to
> the XmlNsMap defined for the output not being applied to the input.
>
> org.jboss.resteasy.plugins.providers.jaxb.JAXBUnmarshalException:
> javax.xml.bind.UnmarshalException
> - with linked exception:
> [com.sun.istack.SAXParseException2; columnNumber: 0; unexpected
> element (uri:"", local:"ejava.link"). Expected elements are
> <{http://ejava.info}link>]
>
> Is there something similar to the ContextResolver<JAXBContext> that
> has to be done for JSON XmlNsMaps?
>
>
> The RESTEasy JSON examples generate data (which I can do) but none
> consume data. I have gotten it to work by injecting a String and
> demarshalling the object thru the Jettison APIs. I can also get the
> manual approach to generate the same error message -- which leads me
> to think the input/demarshaller for JSON needs more than the @Mapped
> annotation.
>
> * I am working with a simple Link class in the "http://ejava.info"; namespace.
> package ejava.util.rest;
> @XmlRootElement(name="link", namespace="http://ejava.info";)
> @XmlType(name="LinkType", namespace="http://ejava.info";)
> public class Link {
> ...
> }
>
> * I have attempted to pass the JSON object straight into the method
> and have RESTEasy do the demarshalling. I have added the
> @Mapped/@XmlNsMap annotations for the used namespace. This has allowed
> me to generate Link objects successfully.
> @PUT @Path("attributes")
> @Consumes(MediaType.APPLICATION_JSON)
> @Produces(MediaType.APPLICATION_JSON)
> @Mapped(namespaceMap = {
> @XmlNsMap(namespace = "http://ejava.info";, jsonName = "ejava"),
> })
> public Response putLinkJSON(Link link) //String jsonString)
> throws JSONException, XMLStreamException, JAXBException {
> link.setHref(uriInfo.getRequestUri());
> link.setType(MediaType.APPLICATION_XML);
> return Response.ok(link, MediaType.APPLICATION_JSON).build();
> }
>
> * When I PUT my JSON object to the method...
>
> PUT /jaxrs-representations-dmv-war6/data/attributes HTTP/1.1
> Content-Type: application/json
> Accept: application/json
> Content-Length: 30
> Host: dmv.ejava.info:9092
> Connection: Keep-Alive
> User-Agent: Apache-HttpClient/4.1.3 (java 1.5)
>
> {"ejava.link":{"@rel":"self"}}
>
>
> ... it reports the following error
> -Failed executing PUT /data/attributes
> org.jboss.resteasy.plugins.providers.jaxb.JAXBUnmarshalException:
> javax.xml.bind.UnmarshalException
> - with linked exception:
> [com.sun.istack.SAXParseException2; columnNumber: 0; unexpected
> element (uri:"", local:"ejava.link"). Expected elements are
> <{http://ejava.info}link>]
> at
> org.jboss.resteasy.plugins.providers.jaxb.AbstractJAXBProvider.readFrom(AbstractJAXBProvider.java:125)
>
> * When I inject the JSON object into a String and manually demarshal
> the JSON. It works (see the 200 reply below)
>
> @PUT @Path("attributes")
> @Consumes(MediaType.APPLICATION_JSON)
> @Produces(MediaType.APPLICATION_JSON)
> @Mapped(namespaceMap = {
> @XmlNsMap(namespace = "http://ejava.info";, jsonName = "ejava"),
> })
> public Response putLinkJSON(String jsonString)
> throws JSONException, XMLStreamException, JAXBException {
>
> JAXBContext ctx = JAXBContext.newInstance(Link.class);
> Configuration config = new Configuration();
> Map<String, String> xmlToJsonNamespaces = new
> HashMap<String,String>();
> xmlToJsonNamespaces.put("http://ejava.info";, "ejava");
> config.setXmlToJsonNamespaces(xmlToJsonNamespaces);
> MappedNamespaceConvention con = new
> MappedNamespaceConvention(config);
>
> JSONObject obj = new JSONObject(jsonString);
> XMLStreamReader xmlStreamReader = new MappedXMLStreamReader(obj,
> con);
> Unmarshaller unmarshaller = ctx.createUnmarshaller();
> Link link = (Link) unmarshaller.unmarshal(xmlStreamReader);
>
> link.setHref(uriInfo.getRequestUri());
> link.setType(MediaType.APPLICATION_XML);
> return Response.ok(link, MediaType.APPLICATION_JSON).build();
> }
>
> HTTP/1.1 200 OK
> Content-Type: application/json
> Transfer-Encoding: chunked
> Server: Jetty(6.1.26)
>
> {"ejava.link":{"@href":"http:\/\/dmv.ejava.info:9092\/jaxrs-representations-dmv-war6\/data\/attributes","@rel":"self","@type":"application\/xml"}}
>
>
> * When I comment out the Map in the working code...
> Map<String, String> xmlToJsonNamespaces = new
> HashMap<String,String>();
> //xmlToJsonNamespaces.put("http://ejava.info";, "ejava");
> config.setXmlToJsonNamespaces(xmlToJsonNamespaces);
>
> ...I get an error message similar to the one from the original case.
> [com.sun.istack.SAXParseException2; columnNumber: 0; unexpected
> element (uri:"", local:"ejava.link"). Expected elements are
> <{http://ejava.info}link>]
> at
> com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:434)
> at
> com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:371)
> at
> com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:341)
> at
> ejava.examples.jaxrsrep.handlers.JSONHandlerDemoRS.putLinkJSON(JSONHandlerDemoRS.java:100)
>
> This leads me to think that I need to register something similar to
> the ContextResolver that I have done for other JAXB cases -- however,
> I haven't located any documentation on how I can help setup the
> Jettison demarshaller.
>
> ideas?
>
> thanks,
> jim
>
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--
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com
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