/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 Copyright (C) 2008 Andreas Gaida

 Copyright (C) 2008, 2009 Ralph Schreyer

 Copyright (C) 2008, 2009 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.

*/

#include <ql/methods/finitedifferences/operators/fdmlinearoplayout.hpp>

#include <ql/methods/finitedifferences/stepconditions/fdmamericanstepcondition.hpp>

#include <utility>

namespace QuantLib {

    FdmAmericanStepCondition::FdmAmericanStepCondition(

        ext::shared_ptr<FdmMesher> mesher, ext::shared_ptr<FdmInnerValueCalculator> calculator)

    : mesher_(std::move(mesher)), calculator_(std::move(calculator)) {}

    void FdmAmericanStepCondition::applyTo(Array& a, Time t) const {

        QL_REQUIRE(mesher_->layout()->size() == a.size(),

                   "inconsistent array dimensions");

        for (const auto& iter : *mesher_->layout()) {

            const Real innerValue = calculator_->innerValue(iter, t);

            if (innerValue > a[iter.index()]) {

                a[iter.index()] = innerValue;

            }

        }

    }

}