From: Paul Taylor <paul_t100_at_fastmail.fm>
Date: Wed, 04 Nov 2009 17:05:00 +0000

I have happily been generating XML from some JAXB classes created from
an Xmlschema for some time, I now also need to allow output as JSON


I'm using Maven and and added

<dependency>
      <groupId>com.sun.jersey</groupId>
      <artifactId>jersey-json</artifactId>
      <version>1.1.2-ea</version>
    </dependency>

I already had

<dependency>
      <groupId>com.sun.xml.bind</groupId>
      <artifactId>jaxb-impl</artifactId>
      <version>2.1.12</version>
      <scope>test</scope>
    </dependency>

this was my existing XML top level method (Metadata is the root JAXB class)

 public void write(PrintWriter out, Results results,) throws IOException {
        try {
            Metadata metadata = write(results);
            Marshaller m = context.createMarshaller();
            m.marshal(metadata, out);
        }
        catch (JAXBException je) {
            throw new IOException(je);
        }

    }

and I added these new Json Methods:

   static final JAXBContext jsoncontext = initJsonContext();

    public String getJsonMimeType() {
          return "application/json; charset=UTF-8";
      }

    private static JAXBContext initJsonContext() {
        try {
            return JSONJAXBContext.newInstance("org.musicbrainz.mmd2");
        }
        catch (JAXBException ex) {
            //Unable to initilize jaxb context, should never happen
            throw new RuntimeException(ex);
        }
    }

    public void writeJson(PrintWriter out, Results results) throws
IOException {
        try {
            Metadata metadata = write(results);
            Marshaller m = jsoncontext.createMarshaller();
            m.marshal(metadata, out);
        }
        catch (JAXBException je) {
            throw new IOException(je);
    }

but its still returning xml, Ive double checked that I deployed
properly, so is there anything else I have to do or should this work.

thanks Paul