Exemplo n.º 1
0
  /** Returns the current enabled elements at the current marking. */
  public HNSubSet getCurrentEnabledElements() {

    int element = -1;
    HNSubSet disabledElements = null;

    disabledElements = new HNSubSet();
    for (int iPossiblyEnabledElements = 0;
        iPossiblyEnabledElements < possiblyEnabledElements.size();
        iPossiblyEnabledElements++) {
      element = possiblyEnabledElements.get(iPossiblyEnabledElements);
      if (!isEnabled(element)) {
        disabledElements.add(element);
      }
    }

    possiblyEnabledElements.removeAll(disabledElements);

    return possiblyEnabledElements;
  }
Exemplo n.º 2
0
  private CombinationTasksToFire findBestCombination(
      CombinationTasksToFire bCombination,
      HNSet inputSet,
      int rootTask,
      CombinationTasksToFire combination,
      HNSubSet treatedTasks) {

    int task = -1;
    HNSet alreadyMarkedPlaces = null;
    HNSet temp_inputSet = null;
    HNSubSet noTokensFromTasks = null;
    HNSubSet subset = null;

    if ((bCombination.getTasks().size() == 0)
        || (bCombination.getNumberMissingTokens() > combination.getNumberMissingTokens())) {
      if (rootTask != ROOT_TASK_ID) {
        alreadyMarkedPlaces = getAlreadyMarkedPlaces(inputSet, rootTask);
        noTokensFromTasks = HNSet.getUnionSet(alreadyMarkedPlaces);
        inputSet.removeAll(alreadyMarkedPlaces);
        combination.getTasks().add(rootTask);
      }

      if (inputSet.size() == 0) {
        bCombination = combination.copy();
      } else {

        // akam: I stoppe here - 10/07/2005
        if (rootTask != ROOT_TASK_ID) {
          temp_inputSet = new HNSet();
          for (int iInputSet = 0; iInputSet < inputSet.size(); iInputSet++) {
            subset = inputSet.get(iInputSet);
            subset.removeAll(noTokensFromTasks);
            subset.removeAll(treatedTasks);
            if (subset.size() == 0) {
              combination.setTokens(combination.getNumberMissingTokens() + 1);
            } else {
              temp_inputSet.add(subset);
            }
          }
          inputSet = temp_inputSet;
        }

        for (int iInputSet = 0; iInputSet < inputSet.size(); iInputSet++) {
          subset = inputSet.get(iInputSet);
          while (subset.size() > 0) {
            task = subset.get(generator.nextInt(subset.size()));
            bCombination =
                findBestCombination(
                    bCombination,
                    inputSet.deepCopy(),
                    task,
                    combination.copy(),
                    treatedTasks.deepCopy());
            treatedTasks.add(task);
            subset.remove(task);
          }
        }
      }
    }

    return bCombination;
  }
Exemplo n.º 3
0
  private CombinationTasksToFire findBestSetTasks(int element) {
    CombinationTasksToFire bCombination = null;
    CombinationTasksToFire combination = null;
    HNSubSet noTokensFromTasks = null;
    HNSubSet treatedTasks = null;
    HNSet inputSet = null;
    HNSet temp_inputSet = null;

    HNSubSet subset = null;

    int numberMissingTokens = 0;
    int rootTask = ROOT_TASK_ID;

    bCombination = new CombinationTasksToFire();

    inputSet = hNet.getInputSet(element);

    if (inputSet.size() == 0) {
      if (startPlace <= 0) {
        numberMissingTokens++; // one token is missing
      }
    } else {
      // inputSubset is not empty. Search for tasks that "have tokens" to
      // element

      noTokensFromTasks = getTasksWithEmptyOutputPlaces(element);

      // >>>>>>>>>>>>>>>>>> Hint!!! I think that's why I don't run into
      // problems...
      // /// Idea -> shrink the subsets without using a temp variable, get
      // / the size before shrinking, shrink them, reorder the set and
      // /remove the empty set (do this via a method in the class
      // /HNSet, get the new size. This is the number of missing tokens.

      // make a copy to avoid destroying the original net
      inputSet = inputSet.deepCopy();
      temp_inputSet = new HNSet();
      // removing the tasks whose output subsets that contain element are
      // empty
      for (int iInputSubsets = 0; iInputSubsets < inputSet.size(); iInputSubsets++) {
        subset = inputSet.get(iInputSubsets);
        subset.removeAll(noTokensFromTasks);
        if (subset.size() == 0) {
          numberMissingTokens += 1;
        } else {
          temp_inputSet.add(subset);
        }
      }
      inputSet = temp_inputSet;
      // retrieving the best combination of tasks that can fire to enable
      // element

      if (inputSet.size() > 0) {
        combination = new CombinationTasksToFire();
        treatedTasks = new HNSubSet();
        bCombination =
            findBestCombination(bCombination, inputSet, rootTask, combination, treatedTasks);
      }
    }

    bCombination.setElementToFire(element);
    bCombination.setTokens(bCombination.getNumberMissingTokens() + numberMissingTokens);

    return bCombination;
  }