class OverlapsFunction extends BaseFEELFunction {

    public FEELFnResult<Boolean> invoke(@ParameterName("range1") Range range1, @ParameterName("range2") Range range2) {
        if (range1 == null) {
            return FEELFnResult.ofError(new InvalidParametersEvent(Severity.ERROR, "range1", "cannot be null"));
        }
        if (range2 == null) {
            return FEELFnResult.ofError(new InvalidParametersEvent(Severity.ERROR, "range2", "cannot be null"));
        }
        try {
            boolean result = (range1.getHighEndPoint().compareTo(range2.getLowEndPoint()) > 0 ||
                              (range1.getHighEndPoint().compareTo(range2.getLowEndPoint()) == 0 &&
                               range1.getHighBoundary() == RangeBoundary.CLOSED &&
                               range2.getLowBoundary() == RangeBoundary.CLOSED)) &&
                             (range1.getLowEndPoint().compareTo(range2.getHighEndPoint()) < 0 ||
                              (range1.getLowEndPoint().compareTo(range2.getHighEndPoint()) == 0 &&
                               range1.getLowBoundary() == RangeBoundary.CLOSED &&
                               range2.getHighBoundary() == RangeBoundary.CLOSED));
            return FEELFnResult.ofResult(result);
        } catch (Exception e) {
            // values are not comparable
            return FEELFnResult.ofError(new InvalidParametersEvent(Severity.ERROR, "range1", "cannot be compared to range2"));
        }
    }

    public  OverlapsFunction();

}