content: package org.apache.archiva.rss;
  
  /*
   * 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.
   */
  
  import com.rometools.rome.feed.synd.SyndContent;
  import com.rometools.rome.feed.synd.SyndContentImpl;
  import com.rometools.rome.feed.synd.SyndEntry;
  import com.rometools.rome.feed.synd.SyndEntryImpl;
  import com.rometools.rome.feed.synd.SyndFeed;
  import com.rometools.rome.feed.synd.SyndFeedImpl;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.context.annotation.Scope;
  import org.springframework.stereotype.Service;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Generates RSS feeds.
   *
   */
  @Service("rssFeedGenerator#default")
  @Scope("prototype")
  public class RssFeedGenerator
  {
      private Logger log = LoggerFactory.getLogger( RssFeedGenerator.class );
  
      // TODO: make configurable
      public static String DEFAULT_FEEDTYPE = "rss_2.0";
  
      public static String DEFAULT_LANGUAGE = "en-us";
  
      public SyndFeed generateFeed( String title, String description, List<RssFeedEntry> dataEntries )
      {
          if( dataEntries.size() ==  0 )
          {
              log.debug( "No updates found, feed not generated." );
              return null;
          }
          
          SyndFeed feed = new SyndFeedImpl();
          feed.setTitle( title );        
          feed.setDescription( description );
          feed.setLanguage( DEFAULT_LANGUAGE );
          feed.setPublishedDate( dataEntries.get( dataEntries.size() - 1 ).getPublishedDate() );
          feed.setFeedType( DEFAULT_FEEDTYPE );
          feed.setEntries( getEntries( dataEntries ) );
  
          log.debug( "Finished generating the feed \'{}\'.", title );
          
          return feed;
      }
  
      private List<SyndEntry> getEntries( List<RssFeedEntry> dataEntries )
      {
          List<SyndEntry> entries = new ArrayList<>();
  
          SyndEntry entry;
          SyndContent description;
  
          for ( RssFeedEntry dataEntry : dataEntries )
          {
              entry = new SyndEntryImpl();
              entry.setTitle( dataEntry.getTitle() );
              entry.setPublishedDate( dataEntry.getPublishedDate() );
  
              description = new SyndContentImpl();
              description.setType( "text/plain" );
              description.setValue( dataEntry.getDescription() );
              entry.setDescription( description );
  
              entries.add( entry );
          }
  
          return entries;
      }
  }
  