package org.jboss.resteasy.plugins.providers.atom;
import com.sun.xml.bind.marshaller.NamespacePrefixMapper;
import org.jboss.resteasy.plugins.providers.jaxb.JAXBContextFinder;
import org.jboss.resteasy.plugins.providers.jaxb.JAXBMarshalException;
import org.jboss.resteasy.plugins.providers.jaxb.JAXBUnmarshalException;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import javax.ws.rs.ext.Providers;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashSet;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@Provider
@Produces("application/atom+*")
@Consumes("application/atom+*")
public class AtomFeedProvider implements MessageBodyReader<Feed>, MessageBodyWriter<Feed>
{
@Context
protected Providers providers;
protected JAXBContextFinder getFinder(MediaType type)
{
ContextResolver<JAXBContextFinder> resolver = providers.getContextResolver(JAXBContextFinder.class, type);
if (resolver == null) return null;
return resolver.getContext(null);
}
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return Feed.class.isAssignableFrom(type);
}
public Feed readFrom(Class<Feed> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream) throws IOException, WebApplicationException
{
JAXBContextFinder finder = getFinder(mediaType);
if (finder == null)
{
throw new JAXBUnmarshalException("Unable to find JAXBContext for media type: " + mediaType);
}
try
{
JAXBContext ctx = finder.findCachedContext(Feed.class, mediaType, annotations);
Feed feed = (Feed) ctx.createUnmarshaller().unmarshal(entityStream);
for (Entry entry : feed.getEntries())
{
if (entry.getContent() != null) entry.getContent().setFinder(finder);
}
return feed;
}
catch (JAXBException e)
{
throw new JAXBUnmarshalException("Unable to unmarshal: " + mediaType, e);
}
}
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return Feed.class.isAssignableFrom(type);
}
public long getSize(Feed feed, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return -1;
}
public void writeTo(Feed feed, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException
{
JAXBContextFinder finder = getFinder(mediaType);
if (finder == null)
{
throw new JAXBMarshalException("Unable to find JAXBContext for media type: " + mediaType);
}
HashSet<Class> set = new HashSet<Class>();
set.add(Feed.class);
for (Entry entry : feed.getEntries())
{
if (entry.getContent() != null && entry.getContent().getJAXBObject() != null)
{
set.add(entry.getContent().getJAXBObject().getClass());
}
}
try
{
JAXBContext ctx = finder.findCacheContext(mediaType, annotations, set.toArray(new Class[set.size()]));
Marshaller marshaller = ctx.createMarshaller();
NamespacePrefixMapper mapper = new NamespacePrefixMapper()
{
public String getPreferredPrefix(String namespace, String s1, boolean b)
{
if (namespace.equals("http://www.w3.org/2005/Atom")) return "atom";
else return s1;
}
};
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", mapper);
marshaller.marshal(feed, entityStream);
}
catch (JAXBException e)
{
throw new JAXBMarshalException("Unable to marshal: " + mediaType, e);
}
}
}