/**
* Return sorted top albums based on the average of each album rating.
*
* @param bHideUnmounted if true, unmounted albums are not chosen
* @param iNbBestofAlbums nb of items to return
* @return top albums, can be less items than required according to nb of available albums
*/
public List<Album> getBestOfAlbums(boolean bHideUnmounted, int iNbBestofAlbums) {
// TODO: this code does not look at "bHideUnmounted" at all, so most of this
// method and
// the double copying is not necessary, or?
// create a temporary table to remove unmounted albums
// We consider an album as mounted if a least one track is mounted
// This hashmap contains album-> album rates
final Map<Album, Float> cacheRate =
new HashMap<Album, Float>(AlbumManager.getInstance().getElementCount());
ReadOnlyIterator<Album> it = AlbumManager.getInstance().getAlbumsIterator();
while (it.hasNext()) {
Album album = it.next();
cacheRate.put(album, (float) album.getRate());
}
// Now sort albums by rating
List<Album> sortedAlbums = new ArrayList<Album>(cacheRate.keySet());
Collections.sort(
sortedAlbums,
new Comparator<Album>() {
public int compare(Album o1, Album o2) {
// lowest first
return (int) (cacheRate.get(o1) - cacheRate.get(o2));
}
});
return getTopAlbums(sortedAlbums, iNbBestofAlbums);
}
/**
* Get sorted list of albums associated with this item.
*
* @param item DOCUMENT_ME
* @return a list of item, void list if no result
*/
public synchronized List<Album> getAssociatedAlbums(Item item) {
List<Album> out;
// [Perf] If item is a track, just return its album
if (item instanceof Track) {
out = new ArrayList<Album>(1);
out.add(((Track) item).getAlbum());
} else {
ReadOnlyIterator<Album> albums = getAlbumsIterator();
// Use a set to avoid dups
Set<Album> albumSet = new HashSet<Album>();
while (albums.hasNext()) {
Album album = albums.next();
for (Track track : album.getTracksCache()) {
if (item instanceof Artist && track.getArtist().equals(item)) {
albumSet.add(album);
} else if (item instanceof Genre && track.getGenre().equals(item)) {
albumSet.add(album);
}
if (item instanceof Year && track.getYear().equals(item)) {
albumSet.add(album);
}
}
}
out = new ArrayList<Album>(albumSet);
Collections.sort(out);
}
return out;
}
/**
* Gets the album by name.
*
* @param name DOCUMENT_ME
* @return associated album (case insensitive) or null if no match
*/
public Album getAlbumByName(String name) {
Album out = null;
for (ReadOnlyIterator<Album> it = getAlbumsIterator(); it.hasNext(); ) {
Album album = it.next();
if (album.getName().equalsIgnoreCase(name)) {
out = album;
break;
}
}
return out;
}
/**
* Force to refresh the album max rating, it is not done soon as it is pretty CPU consumming and
* we don't need a track by track rating precision.
*/
public void refreshMaxRating() {
// create a temporary table to remove unmounted albums
// We consider an album as mounted if a least one track is mounted
// This hashmap contains album-> album rates
final Map<Album, Float> cacheRate =
new HashMap<Album, Float>(AlbumManager.getInstance().getElementCount());
ReadOnlyIterator<Album> it = AlbumManager.getInstance().getAlbumsIterator();
while (it.hasNext()) {
Album album = it.next();
cacheRate.put(album, (float) album.getRate());
}
// OK, now keep only the highest score
for (Map.Entry<Album, Float> album : cacheRate.entrySet()) {
long value = Math.round(album.getValue());
if (value > maxRate) {
maxRate = value;
}
}
}
/**
* Return ordered rarely listen albums list.
*
* @param bHideUnmounted if true, unmounted albums are not chosen
* @param iNb nb of items to return
* @return top albums, can be less items than required according to nb of available albums
*/
public List<Album> getRarelyListenAlbums(boolean bHideUnmounted, int iNb) {
// create a temporary table to remove unmounted albums
// We consider an album as mounted if a least one track is mounted
// This hashmap contains album-> album hits (each track hit average)
final Map<Album, Float> cache =
new HashMap<Album, Float>(AlbumManager.getInstance().getElementCount());
// This hashmap contains album-> nb of tracks already taken into account
// for average
Map<Album, Integer> cacheNb =
new HashMap<Album, Integer>(AlbumManager.getInstance().getElementCount());
ReadOnlyIterator<Track> it = TrackManager.getInstance().getTracksIterator();
while (it.hasNext()) {
Track track = it.next();
if (track.getPlayeableFile(bHideUnmounted) != null) {
float newHits = 0f;
Integer nb = cacheNb.get(track.getAlbum());
if (nb == null) {
nb = 0;
}
Float previousRate = cache.get(track.getAlbum());
if (previousRate == null) {
newHits = track.getHits();
} else {
newHits = ((previousRate * nb) + track.getHits()) / (nb + 1);
}
cacheNb.put(track.getAlbum(), nb + 1);
cache.put(track.getAlbum(), newHits);
}
}
// Now sort albums by rating
List<Album> sortedAlbums = new ArrayList<Album>(cache.keySet());
Collections.sort(
sortedAlbums,
new Comparator<Album>() {
public int compare(Album o1, Album o2) {
// We inverse comparison as we want lowest scores
return (int) (cache.get(o2) - cache.get(o1));
}
});
return getTopAlbums(sortedAlbums, iNb);
}
/*
* (non-Javadoc)
*
* @see org.jajuk.base.Observer#update(org.jajuk.base.Event)
*/
public void update(JajukEvent event) {
JajukEvents subject = event.getSubject();
if (JajukEvents.FILE_NAME_CHANGED.equals(subject)) {
Properties properties = event.getDetails();
File fNew = (File) properties.get(Const.DETAIL_NEW);
File fileOld = (File) properties.get(Const.DETAIL_OLD);
// search references in playlists
ReadOnlyIterator<Playlist> it = getPlaylistsIterator();
while (it.hasNext()) {
Playlist plf = it.next();
if (plf.isReady()) { // check only in mounted
// playlists, note that we can't
// change unmounted playlists
try {
if (plf.getFiles().contains(fileOld)) {
plf.replaceFile(fileOld, fNew);
}
} catch (Exception e) {
Log.error(17, e);
}
}
}
}
}
/**
* Return ordered list of newest albums.
*
* @param bHideUnmounted if true, unmounted albums are not chosen
* @param iNb nb of items to return
* @return newest albums
*/
public List<Album> getNewestAlbums(boolean bHideUnmounted, int iNb) {
// create a temporary table to remove unmounted albums
// We consider an album as mounted if a least one track is mounted
// This hashmap contains album-> discovery date
final Map<Album, Date> cache =
new HashMap<Album, Date>(AlbumManager.getInstance().getElementCount());
ReadOnlyIterator<Track> it = TrackManager.getInstance().getTracksIterator();
while (it.hasNext()) {
Track track = it.next();
if (track.getPlayeableFile(bHideUnmounted) != null) {
cache.put(track.getAlbum(), track.getDiscoveryDate());
}
}
// Now sort albums by discovery date
List<Album> sortedAlbums = new ArrayList<Album>(cache.keySet());
Collections.sort(
sortedAlbums,
new Comparator<Album>() {
public int compare(Album o1, Album o2) {
return cache.get(o1).compareTo(cache.get(o2));
}
});
return getTopAlbums(sortedAlbums, iNb);
}
/** Specialize switchToOrderState, here we sort the album cache in addition. */
public synchronized void orderCache() {
for (ReadOnlyIterator<Album> it = getAlbumsIterator(); it.hasNext(); ) {
Album album = it.next();
Collections.sort(album.getTracksCache(), new TrackComparator(TrackComparatorType.ALBUM));
}
}
