package org.jboss.resteasy.plugins.providers.atom;

import org.apache.abdera.model.Document;
import org.apache.abdera.model.Feed;
import org.apache.abdera.parser.Parser;
import org.apache.abdera.writer.Writer;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

/**
 * @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
 * @version $Revision: 1 $
 */
@Provider
@Consumes(MediaType.APPLICATION_ATOM_XML)
@Produces(MediaType.APPLICATION_ATOM_XML)
public class AbderaFeedProvider extends AbstractAbdera implements MessageBodyReader<Feed>, MessageBodyWriter<Feed>
{
   public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
   {
      return type.equals(Feed.class);
   }

   public Feed readFrom(Class<Feed> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream) throws IOException, WebApplicationException
   {
      Parser parser = abdera.getParser();
      Document<Feed> doc = parser.parse(entityStream);
      return doc.getRoot();
   }

   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
   {
      Writer writer = abdera.getWriter();
      writer.writeTo(feed, entityStream);
   }
}
