c8049ca6cd
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@232 331e1502-861f-0410-8da2-ba01fb791d7f
108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// moeoObjectiveVectorTraits.h
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// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
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/*
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This library...
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Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
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*/
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//-----------------------------------------------------------------------------
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#ifndef MOEOOBJECTIVEVECTORTRAITS_H_
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#define MOEOOBJECTIVEVECTORTRAITS_H_
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#include <vector>
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#include <iostream>
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#include <stdexcept>
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/**
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* A traits class for moeoObjectiveVector to specify the number of objectives and which ones have to be minimized or maximized.
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*/
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class moeoObjectiveVectorTraits
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{
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public:
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/** The tolerance value (used to compare solutions) */
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const static double tol = 1e-6;
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/**
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* Parameters setting
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* @param _nObjectives the number of objectives
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* @param _bObjectives the min/max vector (true = min / false = max)
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*/
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static void setup(unsigned _nObjectives, std::vector < bool > & _bObjectives)
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{
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// in case the number of objectives was already set to a different value
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if ( nObj && (nObj != _nObjectives) ) {
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std::cout << "WARNING\n";
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std::cout << "WARNING : the number of objectives are changing\n";
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std::cout << "WARNING : Make sure all existing objects are destroyed\n";
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std::cout << "WARNING\n";
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}
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// number of objectives
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nObj = _nObjectives;
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// min/max vector
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bObj = _bObjectives;
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// in case the number of objectives and the min/max vector size don't match
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if (nObj != bObj.size())
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throw std::runtime_error("Number of objectives and min/max size don't match in moeoObjectiveVectorTraits::setup");
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}
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/**
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* Returns the number of objectives
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*/
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static unsigned nObjectives()
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{
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// in case the number of objectives would not be assigned yet
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if (! nObj)
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throw std::runtime_error("Number of objectives not assigned in moeoObjectiveVectorTraits");
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return nObj;
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}
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/**
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* Returns true if the _ith objective have to be minimized
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* @param _i the index
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*/
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static bool minimizing(unsigned _i)
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{
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// in case there would be a wrong index
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if (_i >= bObj.size())
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throw std::runtime_error("Wrong index in moeoObjectiveVectorTraits");
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return bObj[_i];
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}
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/**
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* Returns true if the _ith objective have to be maximized
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* @param _i the index
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*/
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static bool maximizing(unsigned _i) {
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return (! minimizing(_i));
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}
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/**
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* Returns the tolerance value (to compare solutions)
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*/
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static double tolerance()
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{
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return tol;
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}
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private:
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/** The number of objectives */
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static unsigned nObj;
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/** The min/max vector */
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static std::vector < bool > bObj;
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};
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#endif /*MOEOOBJECTIVEVECTORTRAITS_H_*/
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// The static variables of the moeoObjectiveVectorTraits class need to be allocated
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// (maybe it would have been better to put this on a moeoObjectiveVectorTraits.cpp file)
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unsigned moeoObjectiveVectorTraits::nObj;
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std::vector < bool > moeoObjectiveVectorTraits::bObj;
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