com.mmounirou.spotirss.rss.ChartRss.java Source code

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Here is the source code for com.mmounirou.spotirss.rss.ChartRss.java

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/*
 * Copyright (C) 2011 Mohamed MOUNIROU
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.mmounirou.spotirss.rss;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Comparator;
import java.util.List;

import javax.annotation.Nonnull;

import org.apache.commons.io.FileUtils;
import org.rometools.fetcher.FeedFetcher;
import org.rometools.fetcher.FetcherException;
import org.rometools.fetcher.impl.DiskFeedInfoCache;
import org.rometools.fetcher.impl.FeedFetcherCache;
import org.rometools.fetcher.impl.HttpURLFeedFetcher;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Predicates;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSortedSet;
import com.mmounirou.spotirss.SpotiRss;
import com.mmounirou.spotirss.provider.Billboard;
import com.mmounirou.spotirss.provider.EntryToTrackConverter;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.FeedException;

public class ChartRss {

    private final String m_title;
    private final ImmutableSet<Track> m_songs;

    public ChartRss(String title, ImmutableSet<Track> songs) {
        m_title = title;
        m_songs = songs;
    }

    @SuppressWarnings("unchecked")
    public static ChartRss getInstance(String strUrl, final EntryToTrackConverter converter)
            throws MalformedURLException, ChartRssException {
        File rssCache = new File(FileUtils.getTempDirectory(), "billboard-charts");
        rssCache.mkdirs();

        FeedFetcherCache feedFetcherCache = new DiskFeedInfoCache(rssCache.getAbsolutePath());
        FeedFetcher feedFetcher = new HttpURLFeedFetcher(feedFetcherCache);

        URL feedUrl = new URL(strUrl);
        try {
            SyndFeed retrievedFeed = feedFetcher.retrieveFeed(feedUrl);
            String title = retrievedFeed.getTitle();
            ImmutableSortedSet<Track> songs = FluentIterable.from((List<SyndEntry>) retrievedFeed.getEntries())
                    .transform(new Function<SyndEntry, Track>() {

                        @Override
                        @Nonnull
                        public Track apply(@Nonnull SyndEntry entry) {
                            try {
                                return converter.apply(entry.getTitle());
                            } catch (Exception e) {
                                SpotiRss.LOGGER.error(String.format("fail to parse %s ", entry.getTitle()));
                                return null;
                            }

                        }

                    }).filter(Predicates.notNull()).toImmutableSortedSet(new Comparator<Track>() {

                        @Override
                        public int compare(Track o1, Track o2) {
                            return Integer.valueOf(o1.getRank()).compareTo(Integer.valueOf(o2.getRank()));
                        }
                    });

            return new ChartRss(title, songs);
        } catch (IllegalArgumentException e) {
            throw new ChartRssException(e);
        } catch (IOException e) {
            throw new ChartRssException(e);

        } catch (FeedException e) {
            throw new ChartRssException(e);

        } catch (FetcherException e) {
            throw new ChartRssException(e);
        }

    }

    public String getTitle() {
        return m_title;
    }

    public ImmutableSet<Track> getSongs() {
        return m_songs;
    }

    public static void main(String[] args) throws MalformedURLException, ChartRssException {
        ChartRss bilboardChartRss = ChartRss.getInstance("http://www.billboard.com/rss/charts/hot-100",
                new Billboard());
        ImmutableSet<Track> songs = bilboardChartRss.getSongs();
        System.out.println(Joiner.on("\n").join(songs));
    }
}