/**
* 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);
}
/**
* 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;
}
}
}