/** * Retrieves an album from the provider, and put it in the cache * * @param ref The reference to the album * @param provider The provider from which retrieve the album * @return The album, or null if the provider says so */ public Album retrieveAlbum(final String ref, final ProviderIdentifier provider) { if (ref == null) { // Force get stack trace try { throw new RuntimeException(); } catch (RuntimeException e) { Log.e(TAG, "retrieveAlbum called with a null reference", e); } return null; } // Try from cache Album output = mCache.getAlbum(ref); if (output == null && provider != null) { ProviderConnection pc = PluginsLookup.getDefault().getProvider(provider); if (pc != null) { IMusicProvider binder = pc.getBinder(); if (binder != null) { try { output = binder.getAlbum(ref); onAlbumUpdate(provider, output); } catch (DeadObjectException e) { Log.e(TAG, "Provider died while retrieving album"); } catch (RemoteException e) { Log.e(TAG, "Unable to retrieve the album", e); } } } } return output; }
/** Called by the providers when the details of a song have been updated. */ @Override public void onSongUpdate(ProviderIdentifier provider, final Song s) throws RemoteException { if (s == null) { Log.w(TAG, "Provider " + provider.mName + " sent in a null songUpdate"); return; } try { Song cached = mCache.getSong(s.getRef()); boolean wasLoaded = false; boolean changed = false; if (cached == null) { mCache.putSong(provider, s); changed = true; cached = s; } else { wasLoaded = cached.isLoaded(); if (s.isLoaded() && !cached.isIdentical(s)) { cached.setAlbum(s.getAlbum()); cached.setArtist(s.getArtist()); cached.setSourceLogo(s.getLogo()); cached.setDuration(s.getDuration()); cached.setTitle(s.getTitle()); cached.setYear(s.getYear()); cached.setOfflineStatus(s.getOfflineStatus()); cached.setAvailable(s.isAvailable()); cached.setIsLoaded(s.isLoaded()); changed = true; } } if (!wasLoaded && cached.isLoaded()) { // Match the album with the artist Artist artist = mCache.getArtist(s.getArtist()); if (artist == null && s.getArtist() != null) { artist = retrieveArtist(s.getArtist(), provider); } if (artist != null) { Album album = mCache.getAlbum(s.getAlbum()); if (album == null && s.getAlbum() != null) { album = retrieveAlbum(s.getAlbum(), provider); } if (album != null) { artist.addAlbum(album.getRef()); } } } if (changed) { postSongForUpdate(cached); } } catch (Exception e) { Log.e(TAG, "Exception while updating song data", e); } }
/** Called by the providers when the details of an album have been updated. */ @Override public void onAlbumUpdate(ProviderIdentifier provider, final Album a) throws RemoteException { if (a == null) { Log.w(TAG, "Provider returned a null album"); return; } Album cached = mCache.getAlbum(a.getRef()); boolean modified = false; // See IProviderCallback.aidl in providerlib for more info about the logic of updating // the Album objects if (cached == null) { mCache.putAlbum(provider, a); cached = a; modified = true; } else if (!cached.isLoaded() || !cached.isIdentical(a)) { cached.setName(a.getName()); cached.setYear(a.getYear()); cached.setIsLoaded(a.isLoaded()); cached.setProvider(a.getProvider()); if (cached.getSongsCount() != a.getSongsCount()) { Iterator<String> songsIt = a.songs(); while (songsIt.hasNext()) { String songRef = songsIt.next(); cached.addSong(songRef); } } modified = true; } if (cached.getProvider() == null) { Log.e(TAG, "Provider for " + cached.getRef() + " is null!"); } if (modified) { // Add the album to each artist of the song (once) Iterator<String> songs = a.songs(); while (songs.hasNext()) { String songRef = songs.next(); Song song = retrieveSong(songRef, a.getProvider()); if (song != null && song.isLoaded()) { String artistRef = song.getArtist(); if (artistRef != null) { Artist artist = retrieveArtist(artistRef, song.getProvider()); if (artist != null) { artist.addAlbum(a.getRef()); } else { if (DEBUG) Log.e(TAG, "Artist is null!"); } } } else { if (DEBUG) Log.e(TAG, "Song is null!"); } } postAlbumForUpdate(cached); } }