private SortedSet<Artist> createArtists(
List<MusicFolder> folders, String[] ignoredArticles, String[] shortcuts) throws IOException {
SortedMap<String, Artist> artistMap = new TreeMap<String, Artist>();
Set<String> shortcutSet = new HashSet<String>(Arrays.asList(shortcuts));
for (MusicFolder folder : folders) {
MusicFile parent = musicFileService.getMusicFile(folder.getPath());
List<MusicFile> children = musicFileService.getChildDirectories(parent);
for (MusicFile child : children) {
if (shortcutSet.contains(child.getName())) {
continue;
}
String sortableName = createSortableName(child.getName(), ignoredArticles);
Artist artist = artistMap.get(sortableName);
if (artist == null) {
artist = new Artist(child.getName(), sortableName);
artistMap.put(sortableName, artist);
}
artist.addMusicFile(child);
}
}
return new TreeSet<Artist>(artistMap.values());
}