id
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1
1.25M
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public TrackerImpl(int port) throws RemoteException, MalformedURLException, AlreadyBoundException { this.peers = new ArrayList<Peer>(); this.randomGenerator = new Random(); // The tracker is a remotely accessible object: bind it to an RMI // registry so that we can retrieve it at a well known address Registry registry = LocateRegistry.createRegistry(port); registry.bind("tracker", this); }
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@Override public synchronized void register(Peer peer) throws AlreadyRegisteredException, RemoteException { if (this.peers.contains(peer)) { throw new AlreadyRegisteredException(peer.getId()); } this.peers.add(peer); }
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@Override public Peer getRandomPeer() throws RemoteException { if (this.peers.isEmpty()) { return null; } return this.peers.get(this.randomGenerator.nextInt(this.peers.size())); }
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@Override public synchronized boolean delPeer(Peer peer) throws RemoteException { return this.peers.remove(peer); }
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public void restoreData(Map<String, String> directoryReplicat) throws RemoteException { boolean verif = false; Peer landmarkPeer = this.getRandomPeer(); Peer nextPeer = landmarkPeer; do { nextPeer = nextPeer.getSuccessor(); if (nextPeer.getDirectory().isEmpty()) { nextPeer.setDirectory(directoryReplicat); System.out.println("Affectation du replicat à un anneau avec un directory vide : " + nextPeer.describe()); verif = true; } } while ((!nextPeer.equals(landmarkPeer) || verif != true)); }
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public PeerImpl(Identifier id) throws RemoteException { this.id = id; this.predecessor = this; this.successor = this; this.successorofsuccessor = this; this.directory = new HashMap<String, String>(); this.directoryReplicat = new HashMap<String, String>(); threadPool = Executors.newScheduledThreadPool(1); final Runnable r = new Runnable() { @Override public void run() { try { // The stabilize method is called periodically to update // the successor and predecessor links of the peer PeerImpl.this.stabilize(); } catch (RemoteException e) { try { System.out.println("Succeseur mort, suppression... " + PeerImpl.this.tracker.delPeer(PeerImpl.this.successor)); PeerImpl.this.successor = PeerImpl.this.successorofsuccessor; PeerImpl.this.successorofsuccessor = PeerImpl.this.successor.getSuccessor(); PeerImpl.this.successor.setPredecessor(PeerImpl.this); PeerImpl.this.predecessor.setSuccessorofSuccessor(PeerImpl.this.successor); System.out.println(PeerImpl.this.describe()); PeerImpl.this.tracker.restoreData(PeerImpl.this.directoryReplicat); } catch (RemoteException et) { } catch (IOException ex) { Logger.getLogger(PeerImpl.class.getName()).log(Level.SEVERE, null, ex); } } } }; threadPool.scheduleAtFixedRate(r, 0, 500, TimeUnit.MILLISECONDS); }
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@Override public void run() { try { // The stabilize method is called periodically to update // the successor and predecessor links of the peer PeerImpl.this.stabilize(); } catch (RemoteException e) { try { System.out.println("Succeseur mort, suppression... " + PeerImpl.this.tracker.delPeer(PeerImpl.this.successor)); PeerImpl.this.successor = PeerImpl.this.successorofsuccessor; PeerImpl.this.successorofsuccessor = PeerImpl.this.successor.getSuccessor(); PeerImpl.this.successor.setPredecessor(PeerImpl.this); PeerImpl.this.predecessor.setSuccessorofSuccessor(PeerImpl.this.successor); System.out.println(PeerImpl.this.describe()); PeerImpl.this.tracker.restoreData(PeerImpl.this.directoryReplicat); } catch (RemoteException et) { } catch (IOException ex) { Logger.getLogger(PeerImpl.class.getName()).log(Level.SEVERE, null, ex); } } }
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@Override public synchronized void create() throws RemoteException { this.predecessor = null; // The bootstrap of the Chord network requires a self loop this.successor = this; }
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@Override public synchronized void join(Peer landmarkPeer) throws RemoteException { this.predecessor = null; // To join the network, ask a peer that is already in the network to // find which peer must be the successor of the joining peer, using // the identifier of the joining peer this.successor = landmarkPeer.findSuccessor(this.id); // The stabilize method will then update all the other links correctly }
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@Override public Peer findSuccessor(Identifier id) throws RemoteException { // There is only one peer in the network if (this.successor.equals(this)) { return this; } // The specified identifier is in between the current peer identifier // and the successor identifier: the successor is then the peer we are // looking for if (id.isBetweenOpenClosed(this.id, this.successor.getId())) { return this.successor; } // Nothing can be deduced from the specified identifier here: // propagate the request in case the successor knows more about it else { return this.successor.findSuccessor(id); } }
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@Override public Identifier getId() throws RemoteException { return this.id; }
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@Override public Peer getPredecessor() throws RemoteException { return this.predecessor; }
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@Override public Peer getSuccessor() throws RemoteException { return this.successor; }
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@Override public synchronized void setPredecessor(Peer peer) throws RemoteException { this.predecessor = peer; }
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@Override public synchronized void setSuccessor(Peer peer) throws RemoteException { this.successor = peer; }
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@Override public boolean equals(Object obj) { try { // Two peers are equal if they have the same identifier return this.id.equals(((Peer) obj).getId()); } catch (RemoteException e) { return false; } }
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@Override public int hashCode() { // The hashcode of a peer is the hashcode of its identifier return this.id.hashCode(); }
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@Override public int compareTo(Peer p) { try { return this.id.compareTo(p.getId()); } catch (RemoteException e) { e.printStackTrace(); return -1; } }
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@Override public synchronized void stabilize() throws RemoteException { // x should be this itself, but it is not always the case, typically // if the successor has recently taken a new peer as predecessor //System.out.println("On peer "+ this.getId()); Peer x = null; try { x = this.successor.getPredecessor(); } catch (NoSuchObjectException e) { System.err.println("Objet succeseur mort"); } // If x is this itself, then this condition is not valid. This // condition is valid if the successor has another peer as predecessor, // then in this case we check if this other peer is indeed included in // the current identifier and the identifier of the successor. If it // is, then it mean that x must be the new successor. if (x != null && x.getId().isBetweenOpenOpen(this.id, this.successor.getId())) { this.successor = x; } this.successorofsuccessor = this.successor.getSuccessor(); // The current peer needs to inform its successor that it is indeed its // successor this.successor.notify(PeerImpl.this); }
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@Override public synchronized void notify(Peer peer) throws RemoteException { // If a new peer notify itself as a predecessor of the current peer, // check if it fits in the interval of the previous predecessor // identifier and it own identifier. If yes, take it as predecessor. // Otherwise, nothing needs to be done. if (this.predecessor == null || peer.getId().isBetweenOpenOpen( this.predecessor.getId(), this.id)) { this.predecessor = peer; } }
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@Override public synchronized void put(String restaurant, String dailySpecial) throws RemoteException { this.directory.put(restaurant, dailySpecial); }
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@Override public String get(String restaurant) throws RemoteException { return this.directory.get(restaurant); }
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@Override public String describe() throws RemoteException { StringBuilder s = new StringBuilder("Peer [id=" + this.id + ", successor=" + this.successor.getId() + ", predecessor=" + this.predecessor.getId() + ", values=["); int cpt = 0; int size = this.directory.size(); for (Entry<String, String> entry : this.directory.entrySet()) { s.append("(" + entry.getKey() + ";" + entry.getValue() + ")"); if (++cpt != size) { s.append(", "); } } s.append("]]"); return s.toString(); }
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public void die() throws RemoteException { // Removes this from the RMI runtime. It will prevent all RMI calls // from executing on this object. A further RMI call on this will // cause a java.rmi.NoSuchObjectException. threadPool.shutdown(); UnicastRemoteObject.unexportObject(this, true); System.out.println("Peer with id " + this.id + " has died."); }
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public void setSuccessorofSuccessor(Peer peer) throws RemoteException { this.successorofsuccessor = peer; }
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public Tracker getTracker() throws RemoteException { return tracker; }
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public void setTracker(Tracker tracker) throws RemoteException { this.tracker = tracker; }
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public String returnKey() throws RemoteException { StringBuilder s = new StringBuilder(); int cpt = 0; int size = this.directory.size(); for (Entry<String, String> entry : this.directory.entrySet()) { s.append(entry.getKey()); } return s.toString(); }
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public String returnValue() throws RemoteException { StringBuilder s = new StringBuilder(); int cpt = 0; int size = this.directory.size(); for (Entry<String, String> entry : this.directory.entrySet()) { s.append(entry.getValue()); } return s.toString(); }
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public void saveReplicat() throws RemoteException { Peer temp = this.successor; for (int i = 0; i < nbReplicat; i++) { tabReplicat[i][0] = temp.returnKey(); tabReplicat[i][1] = temp.returnValue(); temp = temp.getSuccessor(); } }
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public void printReplicat() throws RemoteException { System.out.println(this.describe()); for (int i = 0; i < tabReplicat.length; i++) { System.out.println("Key : " + tabReplicat[i][0] + " Value : " + tabReplicat[i][1]); } System.out.println(""); }
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@Override public void update() throws RemoteException { /*for(int i = 0 ; i < nbReplicat ; i++){ }*/ int i = 0; Peer nextPeer = this; do { if (!tabReplicat[i][0].equals(nextPeer.getSuccessor().returnKey())) { tabReplicat[i][0] = nextPeer.getSuccessor().returnKey(); System.out.println("Mise à jour des réplicats faites..."); } if (!tabReplicat[i][1].equals(nextPeer.getSuccessor().returnValue())) { tabReplicat[i][1] = nextPeer.getSuccessor().returnValue(); System.out.println("Mise à jour des réplicats faites..."); } i = i + 1; nextPeer = nextPeer.getSuccessor(); } while (i != nbReplicat); this.directoryReplicat = this.getSuccessor().getDirectory(); }
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@Override public boolean chercheValeurKeyReplicat(String recherche) throws RemoteException { for (int i = 0; i < tabReplicat.length; i++) { if (tabReplicat[i][0].equals(recherche)) { System.out.println("Trouvé, Value : " + tabReplicat[i][1]); return true; } } return false; }
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public Map<String, String> getDirectory() throws RemoteException { return this.directory; }
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@Override public void setDirectory(Map<String, String> directoryReplicat) { this.directory = directoryReplicat; }
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public Identifier(int value) { if (value < 0 || value > MAX_VALUE) { throw new IllegalArgumentException("Invalid identifier value: " + value); } this.value = value; }
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public boolean isBetweenOpenClosed(Identifier a, Identifier b) { if (a.compareTo(b) < 0) { return this.compareTo(a) > 0 && this.compareTo(b) <= 0; } else { return this.compareTo(a) > 0 || this.compareTo(b) <= 0; } }
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public boolean isBetweenOpenOpen(Identifier a, Identifier b) { if (a.compareTo(b) < 0) { return this.compareTo(a) > 0 && this.compareTo(b) < 0; } else { return this.compareTo(a) > 0 || this.compareTo(b) < 0; } }
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@Override public int compareTo(Identifier id) { return this.value - id.value; }
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@Override public boolean equals(Object obj) { return obj instanceof Identifier && this.value == ((Identifier) obj).value; }
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@Override public int hashCode() { return Long.valueOf(this.value).hashCode(); }
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@Override public String toString() { return Long.toString(this.value); }
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void register(Peer peer) throws AlreadyRegisteredException, RemoteException;
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Peer getRandomPeer() throws RemoteException;
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public boolean delPeer(Peer peer) throws RemoteException;
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public void restoreData(Map<String, String> directoryReplicat) throws RemoteException;
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public static void test(Peer landmarkPeer) throws RemoteException { Peer nextPeer = landmarkPeer; boolean verif = false; Identifier id = new Identifier(700); do { nextPeer = nextPeer.getSuccessor(); if (nextPeer.getId().equals(id)) { System.out.println(nextPeer.getId()); nextPeer.die(); System.out.println("Mort"); verif = true; } } while ((verif != true)); }
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public static void test(Peer landmarkPeer) throws RemoteException { System.out.println("Test de cohérence :"); Peer nextPeer = landmarkPeer; int i = 0; int j = 0; do { i = i + 1; j = j + 1; nextPeer = nextPeer.getSuccessor(); nextPeer.put(Integer.toString(i), Integer.toString(j)); } while (!nextPeer.equals(landmarkPeer)); System.out.println("Mise à jour des liens :"); nextPeer = landmarkPeer; do { nextPeer = nextPeer.getSuccessor(); nextPeer.update(); } while (!nextPeer.equals(landmarkPeer)); System.out.println("Verification :"); nextPeer = landmarkPeer; do { nextPeer = nextPeer.getSuccessor(); System.out.println("\n"); System.out.println("Pour l'ID : " + nextPeer.getId()); nextPeer.printReplicat(); System.out.println("\n"); } while (!nextPeer.equals(landmarkPeer)); }
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public static void testRecherche(Peer landmarkPeer) throws RemoteException{ Peer nextPeer = landmarkPeer; boolean verif = false; System.out.println("Recherche pour le restaurant Clovis"); String recherche = "Clovis"; do { nextPeer = nextPeer.getSuccessor(); if(nextPeer.chercheValeurKeyReplicat(recherche) == true){ verif = true; } } while((!nextPeer.equals(landmarkPeer)) || (verif != true)); }
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public void generateIndividual() { for (int i = 0; i < size(); i++) { byte gene = (byte) Math.round(Math.random()); genes[i] = gene; } }
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public static void setDefaultGeneLength(int length) { defaultGeneLength = length; }
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public byte getGene(int index) { return genes[index]; }
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public void setGene(int index, byte value) { genes[index] = value; fitness = 0; }
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public int size() { return genes.length; }
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public int getFitness() { if (fitness == 0) { fitness = FitnessCalc.getFitness(this); } return fitness; }
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public String toString() { String geneString = ""; for (int i = 0; i < size(); i++) { geneString += getGene(i); } return geneString; }
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public static void main(String[] args) { // Set a candidate solution FitnessCalc.setSolution("1111000000000000000000000000000000000000000000000000000000001111"); // Create an initial population Population myPop = new Population(50, true); // Evolve our population until we reach an optimum solution int generationCount = 0; while (myPop.getFittest().getFitness() < FitnessCalc.getMaxFitness()) { generationCount++; System.out.println("Generation: " + generationCount + " Fittest: " + myPop.getFittest().getFitness()); myPop = Algorithm.evolvePopulation(myPop); } System.out.println("Solution found!"); System.out.println("Generation: " + generationCount); System.out.println("Genes:"); System.out.println(myPop.getFittest()); }
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public static Population evolvePopulation(Population pop) { Population newPopulation = new Population(pop.size(), false); // Keep our best individual if (elitism) { newPopulation.saveIndividual(0, pop.getFittest()); } // Crossover population int elitismOffset; if (elitism) { elitismOffset = 1; } else { elitismOffset = 0; } // Loop over the population size and create new individuals with // crossover for (int i = elitismOffset; i < pop.size(); i++) { Individual indiv1 = tournamentSelection(pop); Individual indiv2 = tournamentSelection(pop); Individual newIndiv = crossover(indiv1, indiv2); newPopulation.saveIndividual(i, newIndiv); } // Mutate population for (int i = elitismOffset; i < newPopulation.size(); i++) { mutate(newPopulation.getIndividual(i)); } return newPopulation; }
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private static Individual crossover(Individual indiv1, Individual indiv2) { Individual newSol = new Individual(); // Loop through genes for (int i = 0; i < indiv1.size(); i++) { // Crossover if (Math.random() <= uniformRate) { newSol.setGene(i, indiv1.getGene(i)); } else { newSol.setGene(i, indiv2.getGene(i)); } } return newSol; }
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private static void mutate(Individual indiv) { // Loop through genes for (int i = 0; i < indiv.size(); i++) { if (Math.random() <= mutationRate) { // Create random gene byte gene = (byte) Math.round(Math.random()); indiv.setGene(i, gene); } } }
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private static Individual tournamentSelection(Population pop) { // Create a tournament population Population tournament = new Population(tournamentSize, false); // For each place in the tournament get a random individual for (int i = 0; i < tournamentSize; i++) { int randomId = (int) (Math.random() * pop.size()); tournament.saveIndividual(i, pop.getIndividual(randomId)); } // Get the fittest Individual fittest = tournament.getFittest(); return fittest; }
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public static void setSolution(byte[] newSolution) { solution = newSolution; }
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static void setSolution(String newSolution) { solution = new byte[newSolution.length()]; // Loop through each character of our string and save it in our byte // array for (int i = 0; i < newSolution.length(); i++) { String character = newSolution.substring(i, i + 1); if (character.contains("0") || character.contains("1")) { solution[i] = Byte.parseByte(character); } else { solution[i] = 0; } } }
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static int getFitness(Individual individual) { int fitness = 0; // Loop through our individuals genes and compare them to our cadidates for (int i = 0; i < individual.size() && i < solution.length; i++) { if (individual.getGene(i) == solution[i]) { fitness++; } } return fitness; }
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static int getMaxFitness() { int maxFitness = solution.length; return maxFitness; }
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public Population(int populationSize, boolean initialise) { individuals = new Individual[populationSize]; // Initialise population if (initialise) { // Loop and create individuals for (int i = 0; i < size(); i++) { Individual newIndividual = new Individual(); newIndividual.generateIndividual(); saveIndividual(i, newIndividual); } } }
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public Individual getIndividual(int index) { return individuals[index]; }
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public Individual getFittest() { Individual fittest = individuals[0]; // Loop through individuals to find fittest for (int i = 0; i < size(); i++) { if (fittest.getFitness() <= getIndividual(i).getFitness()) { fittest = getIndividual(i); } } return fittest; }
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public int size() { return individuals.length; }
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public void saveIndividual(int index, Individual indiv) { individuals[index] = indiv; }
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public static void main( String[] args ) { Area a = Area.EUROPE; a.initializeTimeSlots(); }
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static Set< Cell > analyze( Area _a ) { //place holder for results from > 1 recursive calls SortedSet< Cell > result = new TreeSet(); _a.populate( oneHourBefore, twoHoursBefore ); SortedSet< Cell > cellsForArea = _a.getCells(); cellsForArea.stream().forEach((c) -> { //we could merge this functionality into the Area.populate() method body...? _a.computeHourlyDeltaFor( c ); }); double _threshold = _a.getOverallThreshold(); SortedSet< Cell > cellsAboveThreshold = getCellsAboveThreshold( cellsForArea, _threshold ); //stopping criterium for recursive calls is here: if( cellsAboveThreshold.size() == 0 ) return cellsForArea; else { cellsAboveThreshold.stream().forEach((_c) -> { //zoom in upon the cell and treat it as a new Area just before //initiating the next recursive call to analyze(): result.addAll( analyze( _c.zoom() ) ); }); } return result; }
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private static SortedSet<Cell> getCellsAboveThreshold( SortedSet< Cell > cells, double _threshold) { SortedSet< Cell > result = new TreeSet(); for( Cell _c: cells ) { if( _c.percentage > _threshold ) result.add( _c ); } return result; }
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protected Area( double[] _topLeft, double[] _bottomRight ) { topLeft = _topLeft; bottomRight = _bottomRight; }
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protected Area() { }
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Set<Cell> populate(long[] oneHourBefore, long[] twoHoursBefore) { throw new UnsupportedOperationException("Not supported yet."); }
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public SortedSet< Cell > getCells() { return myCells; }
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public final double getOverallThreshold() { double result = 0; for( Cell c: myCells ) { result += c.percentage; } return result / myCells.size(); }
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void computeHourlyDeltaFor(Cell c) { throw new UnsupportedOperationException("Not supported yet."); }
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void initializeTimeSlots() { throw new UnsupportedOperationException("Not supported yet."); }
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@Override /** * * @param o * @return */ public final boolean equals( Object o ) { if ( o == null ) return false; if( ! ( o instanceof Cell) ) return false; return this.percentage == ( ( Cell ) o ).percentage ; }
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protected Cell( double[] _topLeft, double[] _bottomRight ) { super( _topLeft, _bottomRight ); }
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private Cell() { }
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@Override public int hashCode() { int hash = 7; hash = 11 * hash + (int) (Double.doubleToLongBits(this.percentage) ^ (Double.doubleToLongBits(this.percentage) >>> 32)); return hash; }
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@Override public int compareTo(Cell o) { return ( int ) ( 100 * this.percentage - 100 * o.percentage ); }
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public final Area zoom() { Area a = ( Area ) this; a.myCells = new TreeSet(); double deltaLat = topLeft[ 0 ] - bottomRight[ 0 ] / Analyzer.ZOOM_FACTOR; double deltaLon = bottomRight[ 1 ] - topLeft[ 1 ] / Analyzer.ZOOM_FACTOR; for( int i = 0; i < Analyzer.ZOOM_FACTOR; i++ ) { for( int j = 0; j < Analyzer.ZOOM_FACTOR; j++ ) { Cell __c = new Cell(); __c.topLeft[ 0 ] = topLeft[ 0 ] - j * deltaLat; __c.topLeft[ 1 ] = topLeft[ 1 ] + i * deltaLon; __c.bottomRight[ 0 ] = bottomRight[ 0 ] + ( Analyzer.ZOOM_FACTOR - j ) * deltaLat; __c.bottomRight[ 1 ] = bottomRight[ 1 ] - ( Analyzer.ZOOM_FACTOR - i ) * deltaLon; a.myCells.add( __c ) ; } } return a; }
ea74421b-dc54-4a80-a269-70c970725645
public AppTest( String testName ) { super( testName ); }
2592c82e-f925-4051-bf65-cbe9bd2721fc
public static Test suite() { return new TestSuite( AppTest.class ); }
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public void testApp() { assertTrue( true ); }
8f5537ab-a8f5-48ba-92b6-8810a6aa6962
public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("Hello,Github!"); }
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public TestThread(String name) { super(name);// an usage of super keyword to init a field }
7293611f-33ac-4af0-97b3-a78cc2ee4b96
@Override public void run() { for (int i = 0; i < 5; i++) { for (int k = 0; k < 100000000; k++); System.out.println(this.getName()+" :"+i); } }
5da25e52-3b0b-43f6-94e5-c0adb749b791
public static void main(String[] args) { TestThread tt1 = new TestThread("Robert"); TestThread tt2 = new TestThread("Olivia"); tt1.start(); tt2.start(); }
5d856d71-6d35-48cb-ac7c-5c6441539978
public static void main(String[] args) { DoSomething ds1 = new DoSomething("Robert"); DoSomething ds2 = new DoSomething("Olivia"); Thread t1 = new Thread(ds1); Thread t2 = new Thread(ds2); t1.start(); t2.start(); }
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public DoSomething(String name) { this.name = name; }
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@Override public void run() { for (int i= 0; i < 5; i++) { for (long k = 0; k < 100000000; k++); System.out.println(name+": "+i); } }
0330558b-ffc0-4f9c-81b3-2dd507e1cfb8
public static void main(String[] args) { // TODO Auto-generated method stub }
23b59055-617e-4a1f-9ff9-c01fd6c1066a
public static boolean match(char a,char b) { if(a=='{'){ if(b=='}')return true; } if(a=='('){ if(b==')')return true; } if(a=='['){ if(b==']')return true; } return false; }
51edaa90-9012-4cc3-8572-989da92cf4e7
public static boolean parMatch(String s) { char[] a = s.toCharArray(); for(int i=0;i<a.length/2;i++){ if(!match(a[i],a[a.length-1-i])){ return false; } } return true; }
00a59c53-e577-4a6b-a72c-6606cec2310d
public static void main(String[] args) { // TODO Auto-generated method stub Scanner scanner = new Scanner(System.in); String in = scanner.nextLine(); if (parMatch(in)) { System.out.println("Match"); }else { System.out.println("Not match"); } }