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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
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package org.apache.wink.providers.abdera;
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( {MediaType.APPLICATION_ATOM_XML, MediaType.APPLICATION_JSON})
@Consumes(MediaType.APPLICATION_ATOM_XML)
@Provider
public class AbderaAtomFeedProvider implements MessageBodyWriter<Feed>, MessageBodyReader<Feed> {
private static final Abdera ATOM_ENGINE = new Abdera();
public long getSize(Feed feed,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return -1;
}
public boolean isWriteable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return Feed.class.isAssignableFrom(type);
}
public void writeTo(Feed feed,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException {
if (MediaType.APPLICATION_JSON_TYPE.isCompatible(mediaType)) {
Writer w = ATOM_ENGINE.getWriterFactory().getWriter("json"); //$NON-NLS-1$
feed.writeTo(w, entityStream);
} else {
feed.writeTo(entityStream);
}
}
public boolean isReadable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return Feed.class == type;
}
public Feed readFrom(Class<Feed> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException {
Document<Feed> doc = ATOM_ENGINE.getParser().parse(entityStream);
return doc.getRoot();
}
}