/**
* Copyright 2005-2011 Noelios Technologies.
*
* The contents of this file are subject to the terms of one of the following
* open source licenses: LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL 1.0 (the
* "Licenses"). You can select the license that you prefer but you may not use
* this file except in compliance with one of these Licenses.
*
* You can obtain a copy of the LGPL 3.0 license at
* http://www.opensource.org/licenses/lgpl-3.0.html
*
* You can obtain a copy of the LGPL 2.1 license at
* http://www.opensource.org/licenses/lgpl-2.1.php
*
* You can obtain a copy of the CDDL 1.0 license at
* http://www.opensource.org/licenses/cddl1.php
*
* You can obtain a copy of the EPL 1.0 license at
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the Licenses for the specific language governing permissions and
* limitations under the Licenses.
*
* Alternatively, you can obtain a royalty free commercial license with less
* limitations, transferable or non-transferable, directly at
* http://www.noelios.com/products/restlet-engine
*
* Restlet is a registered trademark of Noelios Technologies.
*/
package org.restlet.ext.rome;
import java.io.IOException;
import java.util.List;
import org.restlet.data.MediaType;
import org.restlet.data.Preference;
import org.restlet.engine.converter.ConverterHelper;
import org.restlet.engine.resource.VariantInfo;
import org.restlet.representation.Representation;
import org.restlet.representation.Variant;
import org.restlet.resource.UniformResource;
import com.sun.syndication.feed.synd.SyndFeed;
/**
* Converter of SyndFeed objects into Representation instances.
*
* @author Thierry Boileau
*
*/
public class RomeConverter extends ConverterHelper {
private static final VariantInfo VARIANT_APPLICATION_ATOM = new VariantInfo(
MediaType.APPLICATION_ATOM);
private static final VariantInfo VARIANT_APPLICATION_RSS = new VariantInfo(
MediaType.APPLICATION_RSS);
@Override
public List<Class<?>> getObjectClasses(Variant source) {
List<Class<?>> result = null;
if (VARIANT_APPLICATION_ATOM.isCompatible(source)
|| VARIANT_APPLICATION_RSS.isCompatible(source)) {
result = addObjectClass(result, SyndFeed.class);
}
return result;
}
@Override
public List<VariantInfo> getVariants(Class<?> source) {
List<VariantInfo> result = null;
if (SyndFeed.class.isAssignableFrom(source)) {
result = addVariant(result, VARIANT_APPLICATION_ATOM);
result = addVariant(result, VARIANT_APPLICATION_RSS);
}
return result;
}
@Override
public <T> float score(Representation source, Class<T> target,
UniformResource resource) {
float result = -1.0F;
if ((source != null) && (SyndFeed.class.isAssignableFrom(target))) {
result = 1.0F;
}
return result;
}
@Override
public float score(Object source, Variant target, UniformResource resource) {
if (source instanceof SyndFeed) {
return 1.0f;
}
return -1.0f;
}
@Override
public <T> T toObject(Representation source, Class<T> target,
UniformResource resource) throws IOException {
Object result = null;
if (SyndFeed.class.isAssignableFrom(target)) {
if (source instanceof SyndFeedRepresentation) {
result = ((SyndFeedRepresentation) source).getFeed();
} else {
result = new SyndFeedRepresentation(source).getFeed();
}
}
return target.cast(result);
}
@Override
public Representation toRepresentation(Object source, Variant target,
UniformResource resource) throws IOException {
if (source instanceof SyndFeed) {
SyndFeed feed = (SyndFeed) source;
if (feed.getFeedType() == null) {
if (VARIANT_APPLICATION_RSS.isCompatible(target)) {
feed.setFeedType("rss_2.0");
} else {
feed.setFeedType("atom_1.0");
}
}
return new SyndFeedRepresentation(feed);
}
return null;
}
@Override
public <T> void updatePreferences(List<Preference<MediaType>> preferences,
Class<T> entity) {
if (SyndFeed.class.isAssignableFrom(entity)) {
updatePreferences(preferences, MediaType.APPLICATION_ATOM, 1.0F);
updatePreferences(preferences, MediaType.APPLICATION_RSS, 1.0F);
}
}
}