List<Tour> list = new ArrayList<>();
    list.add(new Tour("Cruise", "Aircraft", "FB+", 7));
    list.add(new Tour("Shopping", "Train", "FB", 5));
    list.add(new Tour("Shopping", "BUS", "HB", 6));
    list.add(new Tour("Cure", "BUS", "HB", 6));
    list.add(new Tour("Cure", "BUS", "HB", 6));
    list.add(new Tour("Cure", "Aircraft", "HB", 6));
    list.add(new Tour("Cure", "Aircraft", "HB", 6));



    IParameter meal = TourMeal.HB;
    IParameter type = TourType.CURE;
    IParameter transport = TourTransport.AIRCRAFT;

    IParameter[] params = new IParameter[]{meal, type, transport};

    filter(list, params);   /* how to implement this filter? */