getQueenPositions() public method

public getQueenPositions ( ) : List
return List
 public Object result(Object s, Action a)
 {
     if (a is QueenAction)
     {
         QueenAction  qa       = (QueenAction)a;
         NQueensBoard board    = (NQueensBoard)s;
         NQueensBoard newBoard = new NQueensBoard(board.getSize());
         newBoard.setBoard(board.getQueenPositions());
         if (qa.getName() == QueenAction.PLACE_QUEEN)
         {
             newBoard.AddQueenAt(qa.getLocation());
         }
         else if (qa.getName() == QueenAction.REMOVE_QUEEN)
         {
             newBoard.removeQueenFrom(qa.getLocation());
         }
         else if (qa.getName() == QueenAction.MOVE_QUEEN)
         {
             newBoard.moveQueenTo(qa.getLocation());
         }
         s = newBoard;
     }
     // if action is not understood or is a NoOp
     // the result will be the current state.
     return(s);
 }
        //
        // START - Interface FitnessFunction
        public double getValue(String individual)
        {
            double fitness = 0;

            NQueensBoard board     = getBoardForIndividual(individual);
            int          boardSize = board.getSize();

            // Calculate the number of non-attacking pairs of queens (refer to AIMA
            // page 117).
            List <XYLocation> qPositions = board.getQueenPositions();

            for (int fromX = 0; fromX < (boardSize - 1); fromX++)
            {
                for (int toX = fromX + 1; toX < boardSize; toX++)
                {
                    int  fromY            = qPositions.get(fromX).getYCoOrdinate();
                    bool nonAttackingPair = true;
                    // Check right beside
                    int toY = fromY;
                    if (board.queenExistsAt(new XYLocation(toX, toY)))
                    {
                        nonAttackingPair = false;
                    }
                    // Check right and above
                    toY = fromY - (toX - fromX);
                    if (toY >= 0)
                    {
                        if (board.queenExistsAt(new XYLocation(toX, toY)))
                        {
                            nonAttackingPair = false;
                        }
                    }
                    // Check right and below
                    toY = fromY + (toX - fromX);
                    if (toY < boardSize)
                    {
                        if (board.queenExistsAt(new XYLocation(toX, toY)))
                        {
                            nonAttackingPair = false;
                        }
                    }

                    if (nonAttackingPair)
                    {
                        fitness += 1.0;
                    }
                }
            }

            return(fitness);
        }