class CapFloorIborBlackSmileMethod {

  public MultipleCurrencyMulticurveSensitivity presentValueCurveSensitivity(final CapFloorIbor cap, final BlackSmileCapProviderInterface black) {
    ArgumentChecker.notNull(cap, "The cap/floor shoud not be null");
    ArgumentChecker.notNull(black, "Black provider");
    final MulticurveProviderInterface multicurve = black.getMulticurveProvider();
    final EuropeanVanillaOption option = new EuropeanVanillaOption(cap.getStrike(), cap.getFixingTime(), cap.isCap());
    final double forward = multicurve.getSimplyCompoundForwardRate(cap.getIndex(), cap.getFixingPeriodStartTime(), cap.getFixingPeriodEndTime(), cap.getFixingAccrualFactor());
    final double df = multicurve.getDiscountFactor(cap.getCurrency(), cap.getPaymentTime());
    final MulticurveSensitivity forwardDr = MulticurveSensitivity.ofForward(multicurve.getName(cap.getIndex()),
        new SimplyCompoundedForwardSensitivity(cap.getFixingPeriodStartTime(), cap.getFixingPeriodEndTime(), cap.getFixingAccrualFactor(), 1.0));
    final double dfDr = -cap.getPaymentTime() * df;
    final double volatility = black.getBlackParameters().getVolatility(cap.getFixingTime(), cap.getStrike());
    final BlackFunctionData dataBlack = new BlackFunctionData(forward, 1.0, volatility);
    final double[] bsAdjoint = BLACK_FUNCTION.getPriceAdjoint(option, dataBlack);
    final List<DoublesPair> list = new ArrayList<>();
    list.add(DoublesPair.of(cap.getPaymentTime(), dfDr));
    final Map<String, List<DoublesPair>> resultMap = new HashMap<>();
    resultMap.put(multicurve.getName(cap.getCurrency()), list);
    MulticurveSensitivity result = MulticurveSensitivity.ofYieldDiscounting(resultMap);
    result = result.multipliedBy(bsAdjoint[0]);
    result = result.plus(forwardDr.multipliedBy(df * bsAdjoint[1]));
    result = result.multipliedBy(cap.getNotional() * cap.getPaymentYearFraction());
    return MultipleCurrencyMulticurveSensitivity.of(cap.getCurrency(), result);
  }

  private  CapFloorIborBlackSmileMethod();

}