fdmvppstartlimitstepcondition.hpp

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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
/*
 Copyright (C) 2011, 2012 Klaus Spanderen
 
 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/
 
 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at
 <http://quantlib.org/license.shtml>.
 
 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.
*/
 
/*! \file fdmvppstartlimitstepcondition.hpp
    \brief VPP incl start limit step condition for FD models
*/
 
#ifndef quantlib_fdm_vpp_start_limit_step_condition_hpp
#define quantlib_fdm_vpp_start_limit_step_condition_hpp
 
#include <ql/experimental/finitedifferences/fdmvppstepcondition.hpp>
#include <ql/shared_ptr.hpp>
#include <vector>
 
namespace QuantLib {
 
    class FdmVPPStartLimitStepCondition : public FdmVPPStepCondition {
      public:
        FdmVPPStartLimitStepCondition(
            const FdmVPPStepConditionParams& params,
            Size nStarts,
            const FdmVPPStepConditionMesher& mesh,
            const ext::shared_ptr<FdmInnerValueCalculator>& gasPrice,
            const ext::shared_ptr<FdmInnerValueCalculator>& sparkSpreadPrice);
 
        static Size nStates(Size tMinUp, Size tMinDown, Size nStarts);
        Real maxValue(const Array& states) const override;
 
      private:
        Array changeState(Real gasPrice, const Array& state, Time t) const override;
 
        const Size nStarts_;
    };
}
 
#endif