// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-

// (c) Marc Schoenauer, Maarten Keijzer and GeNeura Team, 2000
/*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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 GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
             Marc.Schoenauer@polytechnique.fr
             mak@dhi.dk
 */

#ifndef _eoMonitor_h
#define _eoMonitor_h


#include <vector>
#include <iostream>
#include <eoFunctor.h>

/** @defgroup Monitors Monitoring
 *
 * Monitors take a set of value parameters (eoValueParam) objects and
 * output them on a given stream, file, pipe, etc.
 *
 * They can be called from within an eoCheckPoint, to print different values
 * of parameters or of eoStat at each generation.
 *
 * @see eoCheckPoint
 * @see eoStat
 * @ingroup Utilities
 */


class eoParam;
template <class EOT> class eoCheckPoint;

/**
    The abstract monitor class is a std::vector of parameter pointers. Use
    either push_back a pointer or add a reference to a parameter.
    Derived classes will then implement the operator()(void) which
    will stream or pipe the current values of the parameters to wherever you
    want it streamed or piped to.

    @ingroup Monitors
*/
class eoMonitor : public eoF<eoMonitor&>
{
public :

  virtual void lastCall() {}

  /**
    Adds a parameter to the monitor. It is virtual so you can do some type checking
    in derived classes if you must.
  */
  virtual void add(const eoParam& _param) { vec.push_back(&_param); }

  virtual std::string className(void) const { return "eoMonitor"; }

  template <class EOT>
  eoMonitor& addTo(eoCheckPoint<EOT>& cp) { cp.add(*this); return *this; }

protected :
    typedef std::vector<const eoParam*>::iterator iterator;
    std::vector<const eoParam*> vec;
};

#endif