public Track add(Track track) {
synchronized (this) {
Track copy;
if ((copy = getTrack(track)) == null) {
copy = new Track((Element) doc.importNode(track.getElement(), false));
docElt.appendChild(copy.getElement());
tracks.add(copy);
hash.put(copy.getKey(), copy);
}
return copy;
}
}
public void remove(Track track) {
synchronized (this) {
docElt.removeChild(track.getElement());
tracks.remove(track);
hash.remove(track.getKey());
}
}