Example #1
0
  /**
   * Determine which locations in the PTA satisfy a (Boolean) expression. Note: This is rather
   * inefficiently at the moment. TODO: potentially use explicit.StateMC on dummy model eventually
   */
  private BitSet checkLocationExpression(Expression expr) throws PrismException {
    int i, n;
    BitSet res;

    // Labels - expand and recurse
    // (note: currently not used - these are expanded earlier)
    if (expr instanceof ExpressionLabel) {
      ExpressionLabel exprLabel = (ExpressionLabel) expr;
      if (exprLabel.getName().equals("deadlock"))
        throw new PrismException("The \"deadlock\" label is not yet supported for PTAs");
      if (exprLabel.getName().equals("init"))
        throw new PrismException("The \"init\" label is not yet supported for PTAs");
      i = labelList.getLabelIndex(exprLabel.getName());
      if (i == -1)
        throw new PrismException("Unknown label \"" + exprLabel.getName() + "\" in property");
      // Check recursively
      return checkLocationExpression(labelList.getLabel(i));

    }
    // Other expressions...
    else {
      List<Object> states;
      // Object[] state;
      states = pta.getLocationNameList();
      n = states.size();
      res = new BitSet(n);
      for (i = 0; i < n; i++) {
        // state = (Object[])states.get(i);
        State state = (State) states.get(i);
        if (expr.evaluateBoolean(state, nonClockVarMap)) {
          res.set(i);
        }
      }
    }

    return res;
  }
 public void visitPost(ExpressionLabel e) throws PrismLangException {
   if (!v.contains(e.getName())) {
     v.addElement(e.getName());
   }
 }