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# eoGeneralBreeder.h

    00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
    00002
    00003 //-----------------------------------------------------------------------------
    00004 // eoGeneralBreeder.h
    00005 // (c) Maarten Keijzer and Marc Schoenauer, 2001
    00006 /*
    00007     This library is free software; you can redistribute it and/or
    00008     modify it under the terms of the GNU Lesser General Public
    00009     License as published by the Free Software Foundation; either
    00010     version 2 of the License, or (at your option) any later version.
    00011
    00012     This library is distributed in the hope that it will be useful,
    00013     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00015     Lesser General Public License for more details.
    00016
    00017     You should have received a copy of the GNU Lesser General Public
    00018     License along with this library; if not, write to the Free Software
    00019     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00020
    00021     Contact: mkeijzer@dhi.dk
    00022              Marc.Schoenauer@polytechnique.fr
    00023  */
    00024 //-----------------------------------------------------------------------------
    00025
    00026 #ifndef eoGeneralBreeder_h
    00027 #define eoGeneralBreeder_h
    00028
    00029 //-----------------------------------------------------------------------------
    00030
    00031 /*****************************************************************************
    00032  * eoGeneralBreeder: transforms a population using the generalOp construct.
    00033  *****************************************************************************/
    00034
    00035 #include <eoOp.h>
    00036 #include <eoGenOp.h>
    00037 #include <eoPopulator.h>
    00038 #include <eoSelectOne.h>
    00039 #include <eoBreed.h>
    00040 #include <utils/eoHowMany.h>
    00041
    00045 template<class EOT>
    00046 class eoGeneralBreeder: public eoBreed<EOT>
    00047 {
    00048  public:
    00056   eoGeneralBreeder(
    00057           eoSelectOne<EOT>& _select,
    00058           eoGenOp<EOT>& _op,
    00059                 double  _rate=1.0,
    00060           bool _interpret_as_rate = true) :
    00061       select( _select ), op(_op),  howMany(_rate, _interpret_as_rate) {}
    00062
    00069   eoGeneralBreeder(
    00070           eoSelectOne<EOT>& _select,
    00071           eoGenOp<EOT>& _op,
    00072           eoHowMany _howMany ) :
    00073       select( _select ), op(_op),  howMany(_howMany) {}
    00074
    00080   void operator()(const eoPop<EOT>& _parents, eoPop<EOT>& _offspring)
    00081     {
    00082       unsigned target = howMany(_parents.size());
    00083
    00084       _offspring.clear();
    00085       eoSelectivePopulator<EOT> it(_parents, _offspring, select);
    00086
    00087       while (_offspring.size() < target)
    00088             {
    00089               op(it);
    00090               ++it;
    00091             }
    00092
    00093       _offspring.resize(target);   // you might have generated a few more
    00094     }
    00095
    00097   virtual std::string className() const { return "eoGeneralBreeder"; }
    00098
    00099  private:
    00100   eoSelectOne<EOT>& select;
    00101   eoGenOp<EOT>& op;
    00102   eoHowMany howMany;
    00103 };
    00104
    00105 #endif
    00106