/**
* (non-Javadoc).
*
* @return the string
* @see dj.DigitalDJ#toXML()
*/
@Override
public String toXML() {
StringBuilder sb = new StringBuilder(2000);
sb.append(toXMLGeneralParameters());
sb.append("\t<" + Const.XML_DJ_TRANSITIONS + ">\n");
for (Transition transition : transitions) {
sb.append(
"\t\t<"
+ Const.XML_DJ_TRANSITION
+ " "
+ Const.XML_DJ_FROM
+ "='"
+ transition.getFrom().toXML()
+ "' "
+ Const.XML_DJ_TO
+ "='"
+ transition.getTo().toXML()
+ "' "
+ Const.XML_DJ_NUMBER
+ "='"
+ transition.getNbTracks()
+ "'/>\n");
}
sb.append("\t</" + Const.XML_DJ_TRANSITIONS + ">\n");
sb.append("</" + Const.XML_DJ_DJ + ">\n");
return sb.toString();
}
/**
* Returns a map ambience -> set of files.
*
* @param global initial set of files to consider
* @return a map ambience -> set of files
*/
@SuppressWarnings("unchecked")
private Map<Ambience, List<File>> getAmbienceFilesList(List<File> global) {
// Create a map ambience -> set of files
Map<Ambience, List<File>> hmAmbienceFiles = new HashMap<Ambience, List<File>>(5);
// For performance, we find unique ambiences in from and to transitions
Set<Ambience> ambiences = new HashSet<Ambience>(5);
for (Transition tr : transitions) {
ambiences.add(tr.getFrom());
ambiences.add(tr.getTo());
}
// Fill null key
hmAmbienceFiles.put(null, (List<File>) ((ArrayList<File>) global).clone());
// Fill all ambiences
for (Ambience ambience : ambiences) {
List<File> all = (List<File>) ((ArrayList<File>) global).clone();
CollectionUtils.filter(all, new JajukPredicates.AmbiencePredicate(ambience));
hmAmbienceFiles.put(ambience, all);
}
return hmAmbienceFiles;
}
/**
* Translates the LTS object to its TGF representation.
*
* @return The TGF content.
*/
public String translate() {
StringBuffer sb = new StringBuffer("");
Iterator<State<S, T>> si = lts.getStates();
while (si.hasNext()) {
State s = si.next();
sb.append(s.getId());
sb.append(" ");
sb.append(s.getValue().toString());
sb.append("\n");
}
sb.append("#\n");
Iterator<Transition<T, S>> ti = lts.getTransitions();
while (ti.hasNext()) {
Transition t = ti.next();
sb.append(t.getFrom().getId());
sb.append(" ");
sb.append(t.getTo().getId());
sb.append(" ");
sb.append(t.getValue().toString());
sb.append("\n");
}
return sb.toString();
}
public Transition(Transition orig) {
this.from = new String(orig.getFrom());
this.to = new String(orig.getTo());
this.event = new String(orig.getEvent());
}
/* (non-Javadoc)
* @see org.jajuk.services.dj.DigitalDJ#generatePlaylist()
*/
@Override
public List<File> generatePlaylist() {
List<File> out = new ArrayList<File>(500);
// get a global shuffle selection
List<File> global = FileManager.getInstance().getGlobalShufflePlaylist();
// Select by rate if needed
filterFilesByRate(global);
// None element, leave
if (global.size() == 0) {
return out;
}
// Build a ambience -> files map
Map<Ambience, List<File>> hmAmbienceFiles = getAmbienceFilesList(global);
// compute number of items to add
int items = Math.min(global.size(), Const.NB_TRACKS_ON_ACTION);
if (!bUnicity && items < Const.MIN_TRACKS_NUMBER_WITHOUT_UNICITY) {
// under a limit, if collection is too small and no unicity, use
// several times the same files
items = Const.MIN_TRACKS_NUMBER_WITHOUT_UNICITY;
}
// Get first track
for (File file : global) {
if (transitions.get(0).getFrom().getGenres().contains(file.getTrack().getGenre())) {
out.add(file);
// Unicity in selection, remove it from this ambience
if (bUnicity) {
List<File> files = hmAmbienceFiles.get(getAmbience(file.getTrack().getGenre()));
files.remove(file);
}
items--;
break;
}
}
// none matching track? return
if (out.size() == 0) {
return out;
}
// initialize current ambience with first track ambience (can be null for
// unsorted tracks)
Ambience currentAmbience = getAmbience(out.get(0).getTrack().getGenre());
// start transition applying
while (items > 0) {
// A genre can be in only one transition
Transition currentTransition = getTransition(currentAmbience);
List<File> files = hmAmbienceFiles.get(currentAmbience);
int nbTracks = 2;
if (currentTransition != null) {
nbTracks = currentTransition.getNbTracks();
}
// We remove one item as it has already been added through the first track
if (out.size() == 1) {
nbTracks--;
}
if (files != null && files.size() >= nbTracks) {
for (int i = 0; i < nbTracks && files.size() > 0; i++) {
File file = (File) UtilFeatures.getShuffleItem(files);
out.add(file);
items--;
// Unicity in selection, remove it from this ambience
if (bUnicity) {
files.remove(file);
}
}
} else { // no more tracks for this ambience ? leave
// finally ensure that we don't select more than the max number of tracks
filterFilesByMaxTrack(out);
return out;
}
if (currentTransition != null) {
currentAmbience = currentTransition.getTo();
} else {
break;
}
}
// finally ensure that we don't select more than the max number of tracks
filterFilesByMaxTrack(out);
return out;
}
