weightedsample.h

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// $Id$
// Copyright (C) 2002 Klaas Gadeyne <first dot last at gmail dot com>
 /***************************************************************************
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//

#ifndef WEIGHTEDSAMPLE_H
#define WEIGHTEDSAMPLE_H

#include "sample.h"
#include <assert.h>


namespace BFL
{

  template <typename T> class WeightedSample: virtual public Sample<T>
    {
    protected:
      double Weight;

    public:

      WeightedSample (int dimension = 0 );
      virtual ~WeightedSample();
      WeightedSample ( const WeightedSample<T> & my_weighted_sample );


      double WeightGet (  ) const;


      void WeightSet ( double weight );


      template <typename S> friend ostream & operator<< (ostream & stream,
                                                         WeightedSample<S> & mws);

      WeightedSample<T> & operator= (const WeightedSample<T> & my_sample);

      WeightedSample<T> & operator= (const Sample<T> & my_sample);
    };


  template <typename T> WeightedSample<T>::WeightedSample(int dimension)
    : Sample<T>(dimension){}

  template <typename T> WeightedSample<T>::~WeightedSample(){}

  template <typename T> WeightedSample<T>::WeightedSample (const WeightedSample<T> & mws)
    : Sample<T>(mws)
    {
      Weight = mws.Weight;
    }

  template <typename T> double WeightedSample<T>::WeightGet (  ) const
    {
      return Weight;
    }

  template <typename T> void WeightedSample<T>::WeightSet ( double weight )
    {
      assert(weight >= 0);

      Weight = weight;
    }

  template <typename S> ostream & operator<< (ostream & stream,
                                              WeightedSample<S> & mws)
    {
      stream << "WeightedSample Value = " << (Sample<S> &) mws
             << "Weight = " << mws.Weight << endl;
      return stream;
    }

  template <typename T> WeightedSample<T> & WeightedSample<T>::operator= (const WeightedSample<T> & my_sample)
    {
      // TODO: Does this automatically calls the = operator in the
      // baseclass?  NO!!!
      Sample<T> * op1; const Sample<T> * op2;
      op1 = this; op2 = & my_sample;
      *op1 = *op2;
      this->Weight = my_sample.WeightGet();
      return *this;
    }

  // Turn sample into weighted one (weight = 1)
  template <typename T> WeightedSample<T> & WeightedSample<T>::operator= (const Sample<T> & my_sample)
    {
      //: Does this automatically calls the = operator in the baseclass?
      Sample<T> * op1; const Sample<T> * op2;
      op1 = this; op2 = & my_sample;
      *op1 = *op2;
      this->Weight = 1;
      return *this;
    }

} // End namespace BFL

#endif