recoveryratemodel.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
/*
 Copyright (C) 2009 Jose Aparicio
 
 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.
*/
 
#ifndef quantlib_recovery_rate_model_hpp
#define quantlib_recovery_rate_model_hpp
 
#include <ql/settings.hpp>
#include <ql/handle.hpp>
#include <ql/experimental/credit/defaultprobabilitykey.hpp>
#include <ql/experimental/credit/recoveryratequote.hpp>
 
namespace QuantLib {
 
    class RecoveryRateModel : public virtual Observable {
      public:
        virtual Real recoveryValue(const Date& defaultDate,
            const DefaultProbKey& defaultKey = DefaultProbKey()) const {
            // no check on dates...
            return recoveryValueImpl(defaultDate, defaultKey);
        }
        virtual bool appliesToSeniority(Seniority) const = 0;
        ~RecoveryRateModel() override = default;
 
      protected:
        virtual Real recoveryValueImpl(const Date&,
                                       const DefaultProbKey& defaultKey
                                       ) const = 0;
    };
 
 
    class ConstantRecoveryModel : public RecoveryRateModel,
                                  public Observer {
      public:
        explicit ConstantRecoveryModel(const Handle<RecoveryRateQuote>& quote);
        explicit ConstantRecoveryModel(Real recovery,
                                       Seniority sen = NoSeniority);
        void update() override { notifyObservers(); }
        bool appliesToSeniority(Seniority) const override { return true; }
 
      protected:
        Real recoveryValueImpl(const Date&, const DefaultProbKey&) const override {
            // no match on requested seniority, all pass
            return quote_->value();
        }
 
      private:
        Handle<RecoveryRateQuote> quote_;
    };
 
}
 
#endif