List of usage examples for java.util Collections shuffle
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void shuffle(List<?> list, Random rnd)
From source file:edu.byu.nlp.al.RandomMeasurementSelector.java
/** * @param modelBuilder/*from w w w. jav a 2s . c om*/ * @param annotations */ public RandomMeasurementSelector(MeasurementModelBuilder modelBuilder, Dataset dataset, EmpiricalAnnotations<SparseFeatureVector, Integer> annotations, RandomGenerator rnd) { // we want to add all measurements that are not already taken (used as seed set contained in dataset) // FIXME: this is horrifically inefficient! Fix it! for (FlatInstance<SparseFeatureVector, Integer> meas : annotations.getMeasurements()) { if (!dataset.getMeasurements().contains(meas)) { candidates.add(meas); } } for (Multimap<Integer, FlatInstance<SparseFeatureVector, Integer>> perAnnotatorAnnotations : annotations .getPerInstancePerAnnotatorAnnotations().values()) { for (FlatInstance<SparseFeatureVector, Integer> meas : perAnnotatorAnnotations.values()) { candidates.add(meas); } } Collections.shuffle(candidates, new RandomAdaptor(rnd)); }
From source file:org.messic.server.api.APIRandomLists.java
@Transactional public List<RandomList> getAllLists(User user) { ArrayList<RandomList> result = new ArrayList<RandomList>(); // we will get only 4 lists as maximum, each time different ones... so lets shuffle the lists long seed = System.nanoTime(); ArrayList<RandomListPlugin> lplugins = new ArrayList<RandomListPlugin>(); for (int i = 0; i < plugins.length; i++) { lplugins.add(plugins[i]);/*from ww w. jav a 2 s . c o m*/ } Collections.shuffle(lplugins, new Random(seed)); for (int i = 0; i < lplugins.size() && i < 4; i++) { long start = System.currentTimeMillis(); RandomListPlugin rlp = lplugins.get(i); RandomList rl = rlp.getRandomList(user); if (rl != null && rl.getSongs().size() > 0) { result.add(rl); } long end = System.currentTimeMillis(); log.debug("(" + ((end - start)) + "ms)-Timing obtaining info from plugin:" + rlp.getName()); } return result; }
From source file:emlab.repository.GenericRepository.java
public <T extends NodeBacked> Iterable<T> findAllAtRandom(Class<T> clazz) { List<T> list = Utils.asList(findAll(clazz)); Collections.shuffle(list, new Random()); return list;/*from w w w. ja v a 2 s. c om*/ }
From source file:com.example.android.dragonTV.ui.VerticalGridFragment.java
private void setupFragment() { VerticalGridPresenter gridPresenter = new VerticalGridPresenter(); gridPresenter.setNumberOfColumns(NUM_COLUMNS); setGridPresenter(gridPresenter);/*from www. j av a 2 s . c o m*/ mAdapter = new ArrayObjectAdapter(new CardPresenter()); long seed = System.nanoTime(); HashMap<String, List<Movie>> movies = VideoProvider.getMovieList(); for (Map.Entry<String, List<Movie>> entry : movies.entrySet()) { List<Movie> list = entry.getValue(); Collections.shuffle(list, new Random(seed)); for (Movie movie : list) { mAdapter.add(movie); } } setAdapter(mAdapter); setOnItemViewSelectedListener(new OnItemViewSelectedListener() { @Override public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row) { Log.i(TAG, "onItemSelected: " + item + " row " + row); } }); setOnItemViewClickedListener(new OnItemViewClickedListener() { @Override public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row) { Log.i(TAG, "onItemClicked: " + item + " row " + row); } }); setOnSearchClickedListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(getActivity(), SearchActivity.class); startActivity(intent); } }); setOnItemViewClickedListener(new ItemViewClickedListener()); setOnItemViewSelectedListener(new ItemViewSelectedListener()); }
From source file:interactivespaces.service.audio.player.jukebox.support.ShuffleJukeboxOperation.java
@Override public synchronized void start() { if (!isRunning) { log.info("Starting music jukebox shuffle play"); tracksToPlay = Lists.newArrayList(Iterables.transform(audioRepository.getAllPlayableTracks(), new Function<FilePlayableAudioTrack, String>() { @Override/*from w w w . j av a2 s . c o m*/ public String apply(FilePlayableAudioTrack input) { return input.getMetadata().getId(); } })); Collections.shuffle(tracksToPlay, random); isRunning = true; startPlayingNewTrack(); } else { log.warn("Trying to starting music jukebox shuffle play when already playing"); } }
From source file:emlab.repository.GenericRepository.java
public <T extends NodeBacked> T findOneAtRandom(Class<T> clazz) { List<T> list = Utils.asList(findAll(clazz)); Collections.shuffle(list, new Random()); return list.get(0); }
From source file:additionalpipes.pipes.PipeFluidsTeleport.java
@Override public int fill(ForgeDirection from, FluidStack resource, boolean doFill) { if (CoreProxy.proxy.isRenderWorld(container.worldObj)) { return 0; }//from w w w . j a v a2 s.c o m FluidStack fluid = resource.copy(); List<PipeFluidsTeleport> connectedPipes = logic.getConnectedPipes(true); connectedPipes = Lists.newArrayList(connectedPipes); Collections.shuffle(connectedPipes, container.worldObj.rand); OUTER: for (PipeFluidsTeleport destPipe : connectedPipes) { List<Pair<ForgeDirection, IFluidHandler>> fluidsList = destPipe.getPossibleFluidsMovements(); Collections.shuffle(fluidsList, container.worldObj.rand); for (Pair<ForgeDirection, IFluidHandler> fluids : fluidsList) { ForgeDirection side = fluids.getLeft(); IFluidHandler tank = fluids.getRight(); int usedSingle = tank.fill(side, fluid, false); if (usedSingle > 0) { int energy = APUtils.divideAndCeil(usedSingle, AdditionalPipes.unitFluids); if (doFill ? logic.useEnergy(energy) : logic.canUseEnergy(energy)) { if (doFill) { tank.fill(side, fluid, doFill); } fluid.amount -= usedSingle; if (fluid.amount <= 0) { break OUTER; } } } } } return resource.amount - fluid.amount; }
From source file:com.music.Arpeggiator.java
@Override public void handleScore(Score score, ScoreContext ctx) { Part part = ctx.getParts().get(PartType.ARPEGGIO); if (part == null) { return;//from w ww . j a v a 2 s.c o m } Part mainPart = ctx.getParts().get(PartType.MAIN); double currentMeasureSize = 0; double normalizedMeasureSize = ctx.getNormalizedMeasureSize(); SpecialNoteType specialNoteType = null; for (Phrase phrase : mainPart.getPhraseArray()) { if (Chance.test(20)) { // change the special note type if (Chance.test(60)) { // to a new value specialNoteType = SpecialNoteType.values()[random.nextInt(SpecialNoteType.values().length)]; } else { // reset specialNoteType = null; } } Phrase arpeggioPhrase = new Phrase(); arpeggioPhrase.setTitle("Arpeggio phrase"); Scale currentScale = ((ExtendedPhrase) phrase).getScale(); // get copies of the static ones, so that we can shuffle them without affecting the original List<Chord> scaleChords = new ArrayList<Chord>(ChordUtils.chords.get(currentScale)); Collections.shuffle(scaleChords, random); Note[] notes = phrase.getNoteArray(); List<ToneType> firstToneTypes = new ArrayList<>(); int measures = 0; Note[] currentNotes = null; boolean useTwoNoteChords = Chance.test(14); Chord chord = null; for (int i = 0; i < notes.length; i++) { Note currentNote = notes[i]; if (currentNote.getRhythmValue() == 0) { continue; // rhythm value is 0 for the first notes of a (main-part) chord. So progress to the next } boolean lastMeasure = measures == ctx.getMeasures() - 1; if (currentMeasureSize == 0 && !currentNote.isRest() && !lastMeasure) { boolean preferStable = ToneResolver.needsContrastingChord(firstToneTypes, ToneGroups.UNSTABLE); boolean preferUnstable = ToneResolver.needsContrastingChord(firstToneTypes, ToneGroups.STABLE); // change the chord only in 1/4 of the cases if (currentNotes == null || Chance.test(25)) { // no alternatives for now - only 3-note chords Chord previous = chord; chord = ChordUtils.getChord(ctx, currentNote.getPitch(), previous, scaleChords, scaleChords, scaleChords, preferStable, preferUnstable); if (chord != null) { int[] pitches = chord.getPitches(); //remove the middle note in some cases (but make it possible to have three-note chords in a generally two-note phrase) if (pitches.length == 3 && useTwoNoteChords && Chance.test(90)) { pitches = ArrayUtils.remove(pitches, 1); } int count = Chance.test(90) ? (Chance.test(80) ? 4 : 2) : (Chance.test(80) ? 3 : 5); currentNotes = new Note[count]; double length = normalizedMeasureSize / count; for (int k = 0; k < count; k++) { Note note = NoteFactory.createNote(pitches[random.nextInt(pitches.length)], length); note.setDynamic(InstrumentGroups.getInstrumentSpecificDynamics( 65 + random.nextInt(10), part.getInstrument())); if (specialNoteType != null) { note.setDuration(note.getRhythmValue() * specialNoteType.getValue()); } currentNotes[k] = note; } } } if (Chance.test(85) && currentNotes != null) { for (Note note : currentNotes) { arpeggioPhrase.addNote(note); } } else { arpeggioPhrase.addRest(new Rest(normalizedMeasureSize)); } } else if (currentMeasureSize == 0 && (currentNote.isRest() || lastMeasure)) { arpeggioPhrase.addRest(new Rest(normalizedMeasureSize)); } currentMeasureSize += currentNote.getRhythmValue(); if (currentMeasureSize >= normalizedMeasureSize) { currentMeasureSize = 0; measures++; } } part.add(arpeggioPhrase); } }
From source file:cc.kave.commons.pointsto.evaluation.UsagePruning.java
/** * @return The number of pruned usages//from ww w. j av a 2 s .co m */ public int prune(final int maxUsages, List<Usage> usages) { if (maxUsages <= 0) { throw new IllegalArgumentException("maxUsages must be greater than zero"); } if (usages.size() < maxUsages) { return 0; } Random rnd = new Random(rndGenerator.nextLong()); Collections.shuffle(usages, rnd); final int initialNumUsages = usages.size(); for (int i = usages.size() - 1; i >= maxUsages; --i) { usages.remove(i); } return initialNumUsages - usages.size(); }
From source file:com.example.android.tvleanback2.ui.VerticalGridFragment.java
private void setupFragment() { VerticalGridPresenter gridPresenter = new VerticalGridPresenter(); gridPresenter.setNumberOfColumns(NUM_COLUMNS); setGridPresenter(gridPresenter);/*w w w . ja v a 2 s. c o m*/ mAdapter = new ArrayObjectAdapter(new CardPresenter()); new Handler().postDelayed(new Runnable() { public void run() { long seed = System.nanoTime(); HashMap<String, List<Movie>> movies = VideoProvider.getMovieList(); for (Map.Entry<String, List<Movie>> entry : movies.entrySet()) { List<Movie> list = entry.getValue(); Collections.shuffle(list, new Random(seed)); for (Movie movie : list) { mAdapter.add(movie); } } startEntranceTransition(); } }, 500); setAdapter(mAdapter); setOnSearchClickedListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(getActivity(), SearchActivity.class); startActivity(intent); } }); setOnItemViewClickedListener(new ItemViewClickedListener()); setOnItemViewSelectedListener(new ItemViewSelectedListener()); }