Hello all.
With CXF, I'd like to map my java objects to XML (and later to Json) in
order to send the (streaming) XML to a client. This client might use
JAXB, without any CXF dependances. Currently, I don't use WSDL either
Spring, just CXF HTTP annotation with a web.xml servlet for the
deployment, simply.
I've taken exemple on BadgerFishProvider to construct the provider I
need for my app, the code is below:
============================================================
@Produces("application/xml")
@Consumes("application/xml")
@Provider
public final class BadgerFishProvider implements
MessageBodyWriter<ServerProject> {
private static Map<Class, JAXBContext> jaxbContexts = new
WeakHashMap<Class, JAXBContext>();
@Context private HttpHeaders requestHeaders;
public long getSize(ServerProject project, Class<?> type, Type
genericType, Annotation[] annotations, MediaType m) {
return -1; }
public boolean isWriteable(Class<?> type, Type genericType,
Annotation[] annotations, MediaType m) {
return type.getAnnotation(XmlRootElement.class) != null; }
public void writeTo(ServerProject project, Class<?> clazz, Type
genericType, Annotation[] annotations, MediaType m,
MultivaluedMap<String, Object> headers, OutputStream os)
throws IOException, WebApplicationException {
try {
JAXBContext context = getJAXBContext(project.getClass());
Marshaller marshaller = context.createMarshaller();
XMLOutputFactory factory = new BadgerFishXMLOutputFactory();
XMLStreamWriter xsw = factory.createXMLStreamWriter(os);
marshaller.marshal(project, xsw);
xsw.close(); }
catch (JAXBException e) { e.printStackTrace(); }
catch (XMLStreamException e) { e.printStackTrace();
}
}
private JAXBContext getJAXBContext(Class type) throws JAXBException {
synchronized (jaxbContexts) {
JAXBContext context = jaxbContexts.get(type);
if (context == null) {
context = JAXBContext.newInstance(type);
jaxbContexts.put(type, context);
} return context; }
}
}
============================================================
The ServerProject class right has the @XmlRootElement(name =
"ServerProject") tag and it extends a class Project which contains all
attributes and getters and setters.
Here is the method used at frontend :
============================================================
@GET
@Path("/projects/{id}")
@Produces("application/xml")
public Project getProject(@PathParam("id") int id, @Context
HttpHeaders headers) throws Base64Exception, IOException {
...
try {
Project project = factory.getProject(user, id);
return project;
}
...
}
============================================================
The problem is that marshalled data is JSON instead of being XML.Here is
the result sent by my app:
{"ServerProject":{"dbId":{"$":"128"},"logId":{"$":"0"},"projectId":{"$":"128"},"private":{"$":"false"},"projectDescription":{"$":""},"projectName":{"$":"MAIZEGS"},"remark":{"$":""}}}
I don't understand why Json is produced while all seems to expect XML
data... Does anyone know why ? And if i'm wrong concerning the way I use
to marshall my data with JaxB, do not hesitate to warn me, i'm not sure
to have the good approach.
Thanks for your attention.
--
Raphaël Flores
