Ejemplo n.º 1
0
 public Set<Integer> getSequenceIDs() {
   Set<Integer> ensemble = new HashSet<Integer>();
   for (PseudoSequence sequence : getPseudoSequences()) {
     ensemble.add(sequence.getId());
   }
   return ensemble;
 }
 /**
  * Method to find all frequent items in a projected sequence database
  *
  * @param sequences the set of sequences
  * @return A list of pairs, where a pair is an item with (1) a boolean indicating if it is in an
  *     itemset that is "cut" and (2) the sequence IDs where it occurs.
  */
 protected Set<Pair> findAllFrequentPairs(
     SequentialPattern prefix, List<PseudoSequence> sequences) {
   // We use a Map the store the pairs.
   Map<Pair, Pair> mapPairs = new HashMap<Pair, Pair>();
   // for each sequence
   for (PseudoSequence sequence : sequences) {
     // for each itemset
     for (int i = 0; i < sequence.size(); i++) {
       // for each item
       for (int j = 0; j < sequence.getSizeOfItemsetAt(i); j++) {
         String item = sequence.getItemAtInItemsetAt(j, i);
         // create the pair corresponding to this item
         Pair paire = new Pair(sequence.isPostfix(i), item); // false is ok?
         // get the pair object store in the map if there is one already
         Pair oldPaire = mapPairs.get(paire);
         // if there is no pair object yet
         if (oldPaire == null) {
           // store the pair object that we created
           mapPairs.put(paire, paire);
         } else {
           // otherwise use the old one
           paire = oldPaire;
         }
         // record the current sequence id for that pair
         paire.getSequencesID().add(sequence.getId());
       }
     }
   }
   MemoryLogger.getInstance().checkMemory(); // check the memory for statistics.
   // return the map of pairs
   return mapPairs.keySet();
 }
Ejemplo n.º 3
0
 @Override
 public String toString() {
   StringBuffer r = new StringBuffer("============  CONTEXTE ==========");
   for (PseudoSequence sequence : pseudoSequences) { // pour chaque objet
     r.append(sequence.getId());
     r.append(":  ");
     r.append(sequence.toString());
     r.append('\n');
   }
   return r.toString();
 }