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/*
* 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.tuscany.sca.binding.feed.provider;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Logger;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.DataExchangeSemantics;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.WireFeedInput;
import com.sun.syndication.io.XmlReader;
/**
* Invoker for the RSS binding.
*
* @version $Rev$ $Date$
*/
class RSSBindingInvoker implements Invoker, DataExchangeSemantics {
private static final Logger logger = Logger.getLogger(RSSBindingInvoker.class.getName());
private String feedType;
private String uri;
RSSBindingInvoker(String uri, String feedType) {
this.uri = uri;
this.feedType = feedType;
}
public Message invoke(Message msg) {
try {
logger.info(">>> RSSBindingInvoker (" + feedType + ") " + uri);
// Read the configured feed URI into a Feed object
Feed feed;
if (feedType.startsWith("atom_")) {
// Read an Atom feed
WireFeedInput input = new WireFeedInput();
feed = (Feed)input.build(new XmlReader(new URL(uri)));
} else {
// Read an RSS feed and convert it to an Atom feed
SyndFeedInput input = new SyndFeedInput();
SyndFeed syndFeed = input.build(new XmlReader(new URL(uri)));
feed = (Feed)syndFeed.createWireFeed("atom_1.0");
}
//FIXME Support conversion to data-api entries
msg.setBody(feed);
} catch (MalformedURLException e) {
msg.setFaultBody(e);
} catch (IllegalArgumentException e) {
msg.setFaultBody(e);
} catch (FeedException e) {
msg.setFaultBody(e);
} catch (IOException e) {
msg.setFaultBody(e);
}
return msg;
}
public boolean allowsPassByReference() {
return true;
}
}
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