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

 Copyright (C) 2008 J. Erik Radmall

 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

 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 unitofmeasure.hpp
    \brief Unit of measure

#ifndef quantlib_unit_of_measure_hpp
#define quantlib_unit_of_measure_hpp

#include <ql/types.hpp>
#include <ql/math/rounding.hpp>
#include <boost/shared_ptr.hpp>
#include <string>
#include <map>
#include <ostream>

namespace QuantLib {

    //! %Unit of measure specification
00037     class UnitOfMeasure {
        enum Type { Mass, Volume, Energy, Quantity };
        //! default constructor
        /*! Instances built via this constructor have undefined
            behavior. Such instances can only act as placeholders
            and must be reassigned to a valid currency before being
        UnitOfMeasure(const std::string& name,
                      const std::string& code,
                      Type unitType);
        //! \name Inspectors
        //! name, e.g, "Barrels"
        const std::string& name() const;
        //! code, e.g, "BBL", "MT"
        const std::string& code() const;
        //! unit type (mass, volume...)
        Type unitType() const;
        //! \name Other information
        //! is this a usable instance?
        bool empty() const;
        // rounding
        const Rounding& rounding() const;
        //! unit used for triangulation when required
        const UnitOfMeasure& triangulationUnitOfMeasure() const;
        struct Data;
        boost::shared_ptr<Data> data_;
        static std::map<std::string, boost::shared_ptr<UnitOfMeasure::Data> >

    struct UnitOfMeasure::Data {
        std::string name, code;
        UnitOfMeasure::Type unitType;
        UnitOfMeasure triangulationUnitOfMeasure;
        Rounding rounding;

        Data(const std::string& name,
             const std::string& code,
             UnitOfMeasure::Type unitType,
             const UnitOfMeasure& triangulationUnitOfMeasure = UnitOfMeasure(),
             const Rounding& rounding = Rounding(0));

    /*! \relates UnitOfMeasure */
    bool operator==(const UnitOfMeasure&,
                    const UnitOfMeasure&);

    /*! \relates UnitOfMeasure */
    bool operator!=(const UnitOfMeasure&,
                    const UnitOfMeasure&);

    /*! \relates UnitOfMeasure */
    std::ostream& operator<<(std::ostream&,
                             const UnitOfMeasure&);

    // inline definitions

00105     inline UnitOfMeasure::UnitOfMeasure() {}

00107     inline const std::string& UnitOfMeasure::name() const {
        return data_->name;

00111     inline const std::string& UnitOfMeasure::code() const {
        return data_->code;

00115     inline UnitOfMeasure::Type UnitOfMeasure::unitType() const {
        return data_->unitType;

    inline const Rounding& UnitOfMeasure::rounding() const {
        return data_->rounding;

00123     inline bool UnitOfMeasure::empty() const {
        return !data_;

    inline const UnitOfMeasure&
00128     UnitOfMeasure::triangulationUnitOfMeasure() const {
        return data_->triangulationUnitOfMeasure;

00132     inline bool operator==(const UnitOfMeasure& c1, const UnitOfMeasure& c2) {
        return c1.code() == c2.code();

00136     inline bool operator!=(const UnitOfMeasure& c1, const UnitOfMeasure& c2) {
        return !(c1 == c2);

    class LotUnitOfMeasure : public UnitOfMeasure {
        LotUnitOfMeasure() {
            static boost::shared_ptr<Data> data(
                new Data("Lot", "Lot", UnitOfMeasure::Quantity));
            data_ = data;



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