public SwapSpreadIndex(String familyName, SwapIndex swapIndex1, SwapIndex swapIndex2, double gearing1 = 1.0, double gearing2 = -1.0) : base(familyName, swapIndex1.tenor(), // does not make sense, but we have to provide one swapIndex1.fixingDays(), swapIndex1.currency(), swapIndex1.fixingCalendar(), swapIndex1.dayCounter()) { swapIndex1_ = swapIndex1; swapIndex2_ = swapIndex2; gearing1_ = gearing1; gearing2_ = gearing2; swapIndex1_.registerWith(update); swapIndex2_.registerWith(update); name_ = swapIndex1_.name() + "(" + gearing1 + ") + " + swapIndex2_.name() + "(" + gearing1 + ")"; Utils.QL_REQUIRE(swapIndex1_.fixingDays() == swapIndex2_.fixingDays(), () => "index1 fixing days (" + swapIndex1_.fixingDays() + ")" + "must be equal to index2 fixing days (" + swapIndex2_.fixingDays() + ")"); Utils.QL_REQUIRE(swapIndex1_.fixingCalendar() == swapIndex2_.fixingCalendar(), () => "index1 fixingCalendar (" + swapIndex1_.fixingCalendar() + ")" + "must be equal to index2 fixingCalendar (" + swapIndex2_.fixingCalendar() + ")"); Utils.QL_REQUIRE(swapIndex1_.currency() == swapIndex2_.currency(), () => "index1 currency (" + swapIndex1_.currency() + ")" + "must be equal to index2 currency (" + swapIndex2_.currency() + ")"); Utils.QL_REQUIRE(swapIndex1_.dayCounter() == swapIndex2_.dayCounter(), () => "index1 dayCounter (" + swapIndex1_.dayCounter() + ")" + "must be equal to index2 dayCounter (" + swapIndex2_.dayCounter() + ")"); Utils.QL_REQUIRE(swapIndex1_.fixedLegTenor() == swapIndex2_.fixedLegTenor(), () => "index1 fixedLegTenor (" + swapIndex1_.fixedLegTenor() + ")" + "must be equal to index2 fixedLegTenor (" + swapIndex2_.fixedLegTenor()); Utils.QL_REQUIRE(swapIndex1_.fixedLegConvention() == swapIndex2_.fixedLegConvention(), () => "index1 fixedLegConvention (" + swapIndex1_.fixedLegConvention() + ")" + "must be equal to index2 fixedLegConvention (" + swapIndex2_.fixedLegConvention()); }