Source code

001package org.apache.archiva.rss;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.util.ArrayList;
023import java.util.List;
024
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027
028import com.sun.syndication.feed.synd.SyndContent;
029import com.sun.syndication.feed.synd.SyndContentImpl;
030import com.sun.syndication.feed.synd.SyndEntry;
031import com.sun.syndication.feed.synd.SyndEntryImpl;
032import com.sun.syndication.feed.synd.SyndFeed;
033import com.sun.syndication.feed.synd.SyndFeedImpl;
034import org.springframework.context.annotation.Scope;
035import org.springframework.stereotype.Service;
036
037/**
038 * Generates RSS feeds.
039 *
040 */
041@Service("rssFeedGenerator#default")
042@Scope("prototype")
043public class RssFeedGenerator
044{
045    private Logger log = LoggerFactory.getLogger( RssFeedGenerator.class );
046
047    // TODO: make configurable
048    public static String DEFAULT_FEEDTYPE = "rss_2.0";
049
050    public static String DEFAULT_LANGUAGE = "en-us";
051
052    public SyndFeed generateFeed( String title, String description, List<RssFeedEntry> dataEntries )
053    {
054        if( dataEntries.size() ==  0 )
055        {
056            log.debug( "No updates found, feed not generated." );
057            return null;
058        }
059        
060        SyndFeed feed = new SyndFeedImpl();
061        feed.setTitle( title );        
062        feed.setDescription( description );
063        feed.setLanguage( DEFAULT_LANGUAGE );
064        feed.setPublishedDate( dataEntries.get( dataEntries.size() - 1 ).getPublishedDate() );
065        feed.setFeedType( DEFAULT_FEEDTYPE );
066        feed.setEntries( getEntries( dataEntries ) );
067
068        log.debug( "Finished generating the feed \'{}\'.", title );
069        
070        return feed;
071    }
072
073    private List<SyndEntry> getEntries( List<RssFeedEntry> dataEntries )
074    {
075        List<SyndEntry> entries = new ArrayList<>();
076
077        SyndEntry entry;
078        SyndContent description;
079
080        for ( RssFeedEntry dataEntry : dataEntries )
081        {
082            entry = new SyndEntryImpl();
083            entry.setTitle( dataEntry.getTitle() );
084            entry.setPublishedDate( dataEntry.getPublishedDate() );
085
086            description = new SyndContentImpl();
087            description.setType( "text/plain" );
088            description.setValue( dataEntry.getDescription() );
089            entry.setDescription( description );
090
091            entries.add( entry );
092        }
093
094        return entries;
095    }
096}