public class RandomShift implements ShiftInterface {

    @Override
    public void shift(SwapStoreInterface ss) {
        for (int i = 0; i < ss.length(); i++) {
            ss.setShifts(i, randomShifts(ss.lineIndices(i)));
        }
    }
    private int[][] randomShifts(int[] indices) {
        int[][] result = new int[(int) Math.round(Math.random()*indices.length)][];
        for (int i = 0; i < result.length; i++) {
            result[i] = new int[(int) Math.round(Math.random()*indices.length)];
            for (int j = 0; j < result[i].length; j++) {
                result[i][j] = indices[(int) Math.round(Math.random()*(indices.length -1))];
            }
        }
        return result;
    }
}