Exemplo n.º 1
0
 /**
  * Generates new states for all the old states in the provided FSM. Stores the newly created
  * states into the {@link #newStates} list, and populates the mapping between old state IDs and
  * new state IDs in {@link #oldToNewStates}.
  *
  * @param the {@link FSMPDA} from which the old states are obtained.
  */
 protected void createNewStates(FSMPDA fsm) {
   LinkedList<StatePDA> oldStatesQueue = new LinkedList<StatePDA>();
   oldStatesQueue.add(fsm.getInitialState());
   while (oldStatesQueue.size() > 0) {
     StatePDA anOldState = oldStatesQueue.removeFirst();
     if (oldToNewStates.containsKey(anOldState.getIndex())) {
       // state already converted
     } else {
       // new state required
       SPTBase.State newState = new SPTBase.State();
       newStates.add(newState);
       oldToNewStates.put(anOldState.getIndex(), newStates.size() - 1);
       // queue all old states reachable from this state
       for (gate.fsm.Transition anOldTransition : anOldState.getTransitions()) {
         oldStatesQueue.add((StatePDA) anOldTransition.getTarget());
       }
       // if state is final, set the rule value
       newState.rule = -1;
       if (anOldState.isFinal()) {
         RightHandSide rhs = anOldState.getAction();
         for (int i = 0; i < rules.length; i++) {
           if (rules[i].getRHS() == rhs) {
             newState.rule = i;
             break;
           }
         }
       }
     }
   }
 }
Exemplo n.º 2
0
  /**
   * Parses the provided FSMPDA and converts the old transitions to new ones. The {@link #newStates}
   * list and the {@link #oldToNewStates} mapping should already be populated before this method is
   * called.
   *
   * @param fsm
   * @throws ResourceInstantiationException
   */
  protected void createNewTransitions(FSMPDA fsm) throws ResourceInstantiationException {
    LinkedList<StatePDA> oldStatesQueue = new LinkedList<StatePDA>();
    oldStatesQueue.add(fsm.getInitialState());
    IntArrayList visitedOldStates = new IntArrayList();
    while (oldStatesQueue.size() > 0) {
      StatePDA anOldState = oldStatesQueue.removeFirst();
      if (visitedOldStates.contains(anOldState.getIndex())) {
        // state already processed -> nothing to do
      } else {
        if (!oldToNewStates.containsKey(anOldState.getIndex())) {
          throw new ResourceInstantiationException(
              "State mapping org.p4535992.mvc.error: "
                  + "old state not associated with a new state!");
        }
        SPTBase.State newState = newStates.get(oldToNewStates.get(anOldState.getIndex()));
        // now process all transitions
        List<SPTBase.Transition> newTransitions = new LinkedList<SPTBase.Transition>();
        for (gate.fsm.Transition t : anOldState.getTransitions()) {
          TransitionPDA anOldTransition = (TransitionPDA) t;
          if (!visitedOldStates.contains(anOldTransition.getTarget().getIndex())) {
            oldStatesQueue.add((StatePDA) anOldTransition.getTarget());
          }
          if (!oldToNewStates.containsKey(anOldTransition.getTarget().getIndex())) {
            throw new ResourceInstantiationException(
                "State mapping org.p4535992.mvc.error: "
                    + "old target state not associated with a new state!");
          }
          int newStateTarget = oldToNewStates.get(anOldTransition.getTarget().getIndex());
          SPTBase.Transition newTransition = new SPTBase.Transition();
          newTransitions.add(newTransition);
          newTransition.nextState = newStateTarget;
          newTransition.type = anOldTransition.getType();
          if (newTransition.type != TransitionPDA.TYPE_CONSTRAINT) {
            continue;
          }
          Constraint[] oldConstraints = anOldTransition.getConstraints().getConstraints();
          List<int[]> newConstraints = new ArrayList<int[]>();
          for (int i = 0; i < oldConstraints.length; i++) {
            String annType = oldConstraints[i].getAnnotType();
            int annTypeInt = annotationTypes.indexOf(annType);
            if (annTypeInt < 0) {
              annotationTypes.add(annType);
              annTypeInt = annotationTypes.size() - 1;
            }
            int[] newConstraint = new int[oldConstraints[i].getAttributeSeq().size() + 2];
            newConstraints.add(newConstraint);
            newConstraint[0] = annTypeInt;
            newConstraint[1] = oldConstraints[i].isNegated() ? -1 : 0;
            int predId = 2;
            for (ConstraintPredicate oldPredicate : oldConstraints[i].getAttributeSeq()) {
              newConstraint[predId++] = convertPredicate(annType, oldPredicate);
            }
          }
          // now save the new constraints
          newTransition.constraints = new int[newConstraints.size()][];
          newTransition.constraints = newConstraints.toArray(newTransition.constraints);
        }
        // convert the transitions list to an array
        newState.transitions = new SPTBase.Transition[newTransitions.size()];
        newState.transitions = newTransitions.toArray(newState.transitions);

        // finally, mark the old state as visited.
        visitedOldStates.add(anOldState.getIndex());
      }
    }
  }