/*
* Copyright 2004 Sun Microsystems, Inc.
*
* Licensed 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 com.sun.syndication.samples;
import java.net.URL;
import java.util.List;
import java.util.ArrayList;
import com.sun.syndication.feed.synd.SyndFeedI;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndEntryI;
import com.sun.syndication.io.SyndInput;
import com.sun.syndication.io.SyndOutput;
/**
* It aggregates a list of RSS/Atom feeds (they can be of different types)
* into a single feed of the specified type.
* <p>
* @author Alejandro Abdelnur
*
*/
public class FeedAggregator {
public static void main(String[] args) {
boolean ok = false;
if (args.length>=2) {
try {
String outputType = args[0];
SyndFeedI feed = new SyndFeed();
feed.setTitle("Aggregated Feed");
feed.setDescription("Anonymous Aggregated Feed");
feed.setAuthor("anonymous");
feed.setLink("http://www.anonymous.com");
List entries = new ArrayList();
feed.setEntries(entries);
for (int i=1;i<args.length;i++) {
URL inputUrl = new URL(args[i]);
SyndInput input = new SyndInput();
SyndFeedI inFeed = input.build(inputUrl.openStream());
entries.addAll(inFeed.getEntries());
}
SyndOutput output = new SyndOutput(outputType);
output.output(feed,System.out);
ok = true;
}
catch (Exception ex) {
System.out.println("ERROR: "+ex.getMessage());
}
}
if (!ok) {
System.out.println();
System.out.println("FeedAggregator aggregates different feeds into a single one.");
System.out.println("The first parameter must be the feed type for the aggregated feed.");
System.out.println(" [valid values are: rss_0.9, rss_0.91, rss_0.92, rss_0.93, ]");
System.out.println(" [ rss_0.94, rss_1.0, rss_2.0 & atom_0.3 ]");
System.out.println("The second to last parameters are the URLs of feeds to aggregate.");
System.out.println();
}
}
}