Jervis,
I think that I might be working on your problem here while attacking
something else. More news later.
--benson
On Tue, 2007-12-25 at 02:30 -0500, Liu, Jervis wrote:
> Hi Benson, I guess this is a question for you :-). First of all, I have
> to admit I don't know much about Aegis binding, spent some time this
> morning, looked into unit/system tests and the wiki, but I don't think
> I've gathered enough information to get myself started. Basically, what
> I am looking for is sth similar to JAXB EntityProvider which I
> implemented for JSR-311. See below:
>
> public final class JAXBElementProvider implements EntityProvider<Object>
> {
>
> static Map<Class, JAXBContext> jaxbContexts = new WeakHashMap<Class,
> JAXBContext>();
>
> public boolean supports(Class<?> type) {
> return type.getAnnotation(XmlRootElement.class) != null;
> }
>
> public Object readFrom(Class<Object> type, MediaType m,
> MultivaluedMap<String, String> headers,
> InputStream is) {
> try {
> JAXBContext context = getJAXBContext(type);
> Unmarshaller unmarshaller = context.createUnmarshaller();
> return unmarshaller.unmarshal(is);
> } catch (JAXBException e) {
> e.printStackTrace();
> }
>
> return null;
> }
>
> public void writeTo(Object obj, MediaType m, MultivaluedMap<String,
> Object> headers, OutputStream os) {
> try {
> JAXBContext context = getJAXBContext(obj.getClass());
> Marshaller marshaller = context.createMarshaller();
> marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
> marshaller.marshal(obj, os);
>
> //TODO: support Calendar type
> //}
> } catch (JAXBException e) {
> //TODO: better exception handling
> 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 AegisEntityProvider I want to write should look like below:
>
> public final class AegisEntityProvider implements EntityProvider<Object>
> {
> public boolean supports(Class<?> type) {
> return true;
> }
>
> public Object readFrom(Class<Object> type, MediaType m,
> MultivaluedMap<String, String> headers,
> InputStream is) {
> }
>
> public void writeTo(Object obj, MediaType m, MultivaluedMap<String,
> Object> headers, OutputStream os) {
> }
> }
>
> So for example, the readFrom method is responsible for reading an
> inputstream to an Aegis object. The input are 1). Inputstream 2). The
> Java class type which we want to read to, for example, we want to read
> an inputstream into a Customer object. Based on the information above,
> how I can use Aegis binding to read an object? I thought I can do sth
> like below:
>
> public Object readFrom(Class<Object> type, MediaType m,
> MultivaluedMap<String, String> headers,
> InputStream is) {
> AegisDatabinding binding = new AegisDatabinding();
> DataReader reader = binding.createReader(XMLStreamReader.class);
> XMLStreamReader input =
> XMLInputFactory.newInstance().createXMLStreamReader(is, encoding);
> Object obj = reader.read(type, input);
> return obj;
> }
>
> Unfortunately org.apache.cxf.aegis.databinding.XMLStreamDataReader does
> not have a method whose signature is "public Object read(Class type,
> XMLStreamReader input)". Maybe I should use "public Object read(QName
> name, XMLStreamReader input, Class type) ", but it is not implemented.
>
> Any suggestions? BTW, there is no hurry for this, do enjoy your
> Christmas season.
>
> Merry Christmas,
>
> Jervis
>
> ----------------------------
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