de.kp.ames.web.core.rss.RssProvider.java Source code

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Here is the source code for de.kp.ames.web.core.rss.RssProvider.java

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package de.kp.ames.web.core.rss;
/**
 * This Java module is part of the
 *  Application Developer Framework
 *
 *  Project: AMES-Web-Service
 *  Package: de.kp.ames.web.core.rss
 *  Module: RssProvider
 *  @author krusche@dr-kruscheundpartner.de
 *
 * Add your semantic annotations within the SemanticAssist tags and
 * mark them with a leading hashtag #:
 *
 * <SemanticAssist>
 *     #core #provider #rss #web
 * </SemanticAssist>
 *
 */

/**
 *   Copyright 2012 Dr. Krusche & Partner PartG
 *
 *   AMES-Web-Service is free software: you can redistribute it and/or 
 *   modify it under the terms of the GNU General Public License 
 *   as published by the Free Software Foundation, either version 3 of 
 *   the License, or (at your option) any later version.
 *
 *   AMES- Web-Service is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 * 
 *  See the GNU General Public License for more details. 
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this software. If not, see <http://www.gnu.org/licenses/>.
 *
 */
import java.io.StringWriter;
import java.io.Writer;
import java.util.List;

import org.json.JSONArray;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.feed.synd.SyndFeedImpl;
import com.sun.syndication.io.SyndFeedOutput;

import de.kp.ames.web.Bundle;
import de.kp.ames.web.GlobalConstants;

public class RssProvider {

    private static String FEED_TYPE = "rss_2.0";
    private static String FEED_URI = Bundle.getInstance().getString(GlobalConstants.RSS_ENDPOINT);

    private static String FEED_TITLE = GlobalConstants.FEED_TITLE;
    private static String FEED_DESC = GlobalConstants.FEED_DESC;

    private static RssCacheManager processor;

    public RssProvider() {
        processor = RssCacheManager.getInstance();
    }

    public String getFeed() {

        try {

            SyndFeed feed = new SyndFeedImpl();

            /* 
             * Describe feed
             */
            feed.setTitle(FEED_TITLE);
            feed.setDescription(FEED_DESC);

            feed.setFeedType(FEED_TYPE);
            feed.setUri(FEED_URI);

            /* 
             * Finally we get feeds from processor
             */
            List<SyndEntry> entries = processor.getEntries();
            feed.setEntries(entries);

            Writer writer = new StringWriter();

            SyndFeedOutput output = new SyndFeedOutput();
            output.output(feed, writer);

            String content = writer.toString();
            writer.close();

            return content;

        } catch (Exception e) {
            e.printStackTrace();

        } finally {
        }

        return null;

    }

    /**
     * Get RSS feed in JSON representation
     * 
     * @return
     */
    public JSONArray getJFeed() {

        try {

            List<SyndEntry> entries = processor.getEntries();
            return RssConverter.getJFeed(entries);

        } catch (Exception e) {
            e.printStackTrace();

        } finally {
        }

        return null;

    }

}