- /**
- * Removes an album from this album.
- *
- * @param album
- * The album to remove
- */
- public void removeAlbum(Album album) {
- checkNotNull(album, "album must not be null");
- checkArgument(album.sone.equals(sone), "album must belong this album’s Sone");
- checkArgument(equals(album.parent), "album must belong to this album");
- albums.remove(album);
- album.removeParent();
- }
-
- /**
- * Moves the given album up in this album’s albums. If the album is already
- * the first album, nothing happens.
- *
- * @param album
- * The album to move up
- * @return The album that the given album swapped the place with, or
- * <code>null</code> if the album did not change its place
- */
- public Album moveAlbumUp(Album album) {
- checkNotNull(album, "album must not be null");
- checkArgument(album.sone.equals(sone), "album must belong to the same Sone as this album");
- checkArgument(equals(album.parent), "album must belong to this album");
- int oldIndex = albums.indexOf(album);
- if (oldIndex <= 0) {
- return null;
- }
- albums.remove(oldIndex);
- albums.add(oldIndex - 1, album);
- return albums.get(oldIndex);
- }
-
- /**
- * Moves the given album down in this album’s albums. If the album is
- * already the last album, nothing happens.
- *
- * @param album
- * The album to move down
- * @return The album that the given album swapped the place with, or
- * <code>null</code> if the album did not change its place
- */
- public Album moveAlbumDown(Album album) {
- checkNotNull(album, "album must not be null");
- checkArgument(album.sone.equals(sone), "album must belong to the same Sone as this album");
- checkArgument(equals(album.parent), "album must belong to this album");
- int oldIndex = albums.indexOf(album);
- if ((oldIndex < 0) || (oldIndex >= (albums.size() - 1))) {
- return null;
- }
- albums.remove(oldIndex);
- albums.add(oldIndex + 1, album);
- return albums.get(oldIndex);
- }