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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 feed;
import java.util.ArrayList;
import java.util.List;
import org.apache.tuscany.sca.binding.feed.Feed;
import org.osoa.sca.annotations.Property;
import org.osoa.sca.annotations.Reference;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndFeedImpl;
/**
* Implementation of an SCA component that aggregates several
* Atom and RSS feeds.
*
* @version $Rev$ $Date$
*/
public class AggregatorImpl implements Feed {
@Reference
public Feed feed1;
@Reference
public Feed feed2;
@Reference(required = false)
public Sort sort;
@Property
public String feedTitle = "Aggregated Feed";
@Property
public String feedDescription = "Anonymous Aggregated Feed";
@Property
public String feedAuthor = "anonymous";
@SuppressWarnings("unchecked")
public SyndFeed get(String uri) {
// Create a new Feed
SyndFeed feed = new SyndFeedImpl();
feed.setTitle(feedTitle);
feed.setDescription(feedDescription);
feed.setAuthor(feedAuthor);
feed.setLink(uri);
// Aggregate entries from feed1 and feed2
List<SyndEntry> entries = new ArrayList<SyndEntry>();
entries.addAll(feed1.get(null).getEntries());
entries.addAll(feed2.get(null).getEntries());
// Sort entries by published date
if (sort != null)
feed.setEntries(sort.sort(entries));
else
feed.setEntries(entries);
return feed;
}
}
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