PodcastService.java 文件源码

/**
 * Returns the N newest episodes.
 *
 * @return Possibly empty list of the newest Podcast episodes, sorted in
 *         reverse chronological order (newest episode first).
 */
public List<PodcastEpisode> getNewestEpisodes(int count) {
    List<PodcastEpisode> episodes = addMediaFileIdToEpisodes(podcastDao.getNewestEpisodes(count));

    return Lists.newArrayList(Iterables.filter(episodes, new Predicate<PodcastEpisode>() {
        @Override
        public boolean apply(PodcastEpisode episode) {
            Integer mediaFileId = episode.getMediaFileId();
            if (mediaFileId == null) {
                return false;
            }
            MediaFile mediaFile = mediaFileService.getMediaFile(mediaFileId);
            return mediaFile != null && mediaFile.isPresent();
        }
    }));
}