/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cxf.jaxrs.provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
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 org.apache.abdera.Abdera;
import org.apache.abdera.model.Document;
import org.apache.abdera.model.Feed;
import org.apache.abdera.writer.Writer;
@Produces({"application/atom+xml", "application/atom+xml;type=feed", "application/json" })
@Consumes({"application/atom+xml", "application/atom+xml;type=feed" })
@Provider
public class AtomFeedProvider
implements MessageBodyWriter<Feed>, MessageBodyReader<Feed> {
private static final String JSON_TYPE = "application/json";
private static final Abdera ATOM_ENGINE = new Abdera();
public long getSize(Feed feed, Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) {
return -1;
}
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) {
return Feed.class.isAssignableFrom(type);
}
public void writeTo(Feed feed, Class<?> clazz, Type type, Annotation[] a,
MediaType mt, MultivaluedMap<String, Object> headers, OutputStream os)
throws IOException {
if (JSON_TYPE.equals(mt.toString())) {
Writer w = ATOM_ENGINE.getWriterFactory().getWriter("json");
feed.writeTo(w, os);
} else {
feed.writeTo(os);
}
}
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mt) {
return Feed.class.isAssignableFrom(type);
}
public Feed readFrom(Class<Feed> clazz, Type t, Annotation[] a, MediaType mt,
MultivaluedMap<String, String> headers, InputStream is)
throws IOException {
Document<Feed> doc = ATOM_ENGINE.getParser().parse(is);
return doc.getRoot();
}
}