eorealbounds.h

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  virtual double maximum() const 
  {
    throw std::logic_error("Trying to get maximum of eoRealBelowBound");
  }
  virtual double range() const 
  {
    throw std::logic_error("Trying to get range of eoRealBelowBound");
  }

  // random generators
  virtual double uniform(eoRng & _rng = eo::rng) const 
  {
    throw std::logic_error("Trying to generate uniform values in eoRealBelowBound");
  }

  // description
  virtual bool isBounded(void)  const {return false;}
  virtual bool hasNoBoundAtAll(void)  const {return false;}
  virtual bool isMinBounded(void)  const {return true;}
  virtual bool isMaxBounded(void) const  {return false;}

  // says if a given double is within the bounds
  virtual bool isInBounds(double _r) const 
  {
    if (_r < repMinimum)
      return false;
    return true;
  }

  // folds a value into bounds
  virtual void foldsInBounds(double &  _r) const 
  {
    // easy as a pie: symmetry w.r.t. minimum
    if (_r < repMinimum)	   // nothing to do otherwise
      _r = 2*repMinimum - _r;
    return ;
  }    

  // truncates to the bounds
  virtual void truncate(double & _r) const 
  {
    if (_r < repMinimum)
      _r = repMinimum;
    return;
  }

  // methods from eoPersistent
  /**
   * Read object.
   * @param _is A std::istream.
   * but reading should not be done here, because of bound problems
   * see eoRealVectorBounds
   */
  virtual void readFrom(std::istream& _is) 
  {
    throw std::runtime_error("Should not use eoRealBelowBound::readFrom");
  }

  /**
   * Write object. It's called printOn since it prints the object on a stream.
   * @param _os A std::ostream.
   */
  virtual void printOn(std::ostream& _os) const
  {
    _os << "[" << repMinimum << ",+inf]";
  }

  /** for memory managements - ugly */
  virtual eoRealBounds * dup() const 
  {
    return new eoRealBelowBound(*this);
  }

private :
  double repMinimum;
};

/**
An eoRealBound bounded from above only
*/
class eoRealAboveBound : public eoRealBounds
{
public :
  virtual ~eoRealAboveBound(){}
  
  /** 
      Simple bounds = minimum
  */
  eoRealAboveBound(double _max=0) : 
    repMaximum(_max)
  {}

  // accessors  
  virtual double maximum() const  { return repMaximum; }

  virtual double minimum() const 
  {
    throw std::logic_error("Trying to get minimum of eoRealAboveBound");
  }
  virtual double range() const 
  {
    throw std::logic_error("Trying to get range of eoRealAboveBound");
  }

  // random generators
  virtual double uniform(eoRng & _rng = eo::rng) const 
  {
    throw std::logic_error("Trying to generate uniform values in eoRealAboveBound");
  }

  // description
  virtual bool isBounded(void)  const {return false;}
  virtual bool hasNoBoundAtAll(void)  const {return false;}
  virtual bool isMinBounded(void)  const {return false;}
  virtual bool isMaxBounded(void)  const {return true;}

  // says if a given double is within the bounds
  virtual bool isInBounds(double _r) const 
  {
    if (_r > repMaximum)
      return false;
    return true;
  }

  // folds a value into bounds
  virtual void foldsInBounds(double &  _r) const 
  {
    // easy as a pie: symmetry w.r.t. maximum
    if (_r > repMaximum)	   // nothing to do otherwise
      _r = 2*repMaximum - _r;
    return ;
  }    

  // truncates to the bounds
  virtual void truncate(double & _r) const 
  {
    if (_r > repMaximum)
      _r = repMaximum;
    return;
  }

  // methods from eoPersistent
  /**
   * Read object.
   * @param _is A std::istream.
   * but reading should not be done here, because of bound problems
   * see eoRealVectorBounds
   */
  virtual void readFrom(std::istream& _is) 
  {
    throw std::runtime_error("Should not use eoRealAboveBound::readFrom");
  }

  /**
   * Write object. It's called printOn since it prints the object on a stream.
   * @param _os A std::ostream.
   */
  virtual void printOn(std::ostream& _os) const
  {
    _os << "[-inf," << repMaximum << "]";
  }

  /** for memory managements - ugly */
  virtual eoRealBounds * dup() const 
  {
    return new eoRealAboveBound(*this);
  }

private :
  double repMaximum;
};

//////////////////////// tentative for a general BOUND class that is constructed from a string

/** A class that encapsulate all possible eoIntBounds.
 *  Mandatory in order to read through the parser
 */
class eoGeneralRealBounds : public eoRealBounds
{
public:
  /** Ctor: from a string, chooses the type of bound */
  eoGeneralRealBounds(std::string _s = "[-infinity,+infinity]")
  {
    repBound = getBoundsFromString(_s);
  }

  /** Need a Cpy Ctor because we are allocating memory */
  eoGeneralRealBounds(const eoGeneralRealBounds & _b):eoRealBounds(_b)
  {
    // replicate the embedded bound (I'm pretty sure there is another
    // way to do that !!!

    bool minBounded = _b.isMinBounded();
    bool maxBounded = _b.isMaxBounded();
    double minimum, maximum;
    const eoRealBounds & bb = _b.theBounds();
    if (minBounded) minimum = bb.minimum();
    if (maxBounded) maximum = bb.maximum();

      if (minBounded && maxBounded)
	repBound = new eoRealInterval(minimum, maximum);
      else if (!minBounded && !maxBounded)	// no bound at all
	repBound = new eoRealNoBounds;
      else if (!minBounded && maxBounded)
	repBound = new eoRealAboveBound(maximum);
      else if (minBounded && !maxBounded)
	repBound = new eoRealBelowBound(minimum);
  }

  eoGeneralRealBounds& operator=(const eoGeneralRealBounds& _b)
  {
    // replicate the embedded bound (I'm pretty sure there is another
    // way to do that !!!

    bool minBounded = _b.isMinBounded();
    bool maxBounded = _b.isMaxBounded();
    double minimum, maximum;
    const eoRealBounds & bb = _b.theBounds();
    if (minBounded) minimum = bb.minimum();
    if (maxBounded) maximum = bb.maximum();

    // first delete the embedded bounds if necessary
    if (repBound)
      delete repBound;
    // now reallocate
      if (minBounded && maxBounded)
	repBound = new eoRealInterval(minimum, maximum);
      else if (!minBounded && !maxBounded)	// no bound at all
	repBound = new eoRealNoBounds;
      else if (!minBounded && maxBounded)
	repBound = new eoRealAboveBound(maximum);
      else if (minBounded && !maxBounded)
	repBound = new eoRealBelowBound(minimum);
      return (*this);
  }


  /** Need a Dtor because we allocate an actual bound  */
  ~eoGeneralRealBounds()
  {
    delete repBound;
  }

  ///// and now all methods from the embedded bounds
  /** Self-Test: true if ***both*** a min and a max
   */
  virtual bool isBounded(void)  const {return repBound->isBounded();}

  /** Self-Test: true if no min ***and*** no max
   *        hence no further need to test/truncate/fold anything
   */
  virtual bool hasNoBoundAtAll(void)  const {return repBound->hasNoBoundAtAll();}

  /** Self-Test: bounded from below???
   */
  virtual bool isMinBounded(void)  const {return repBound->isMinBounded();}

  /** Self-Test: bounded from above???
   */
  virtual bool isMaxBounded(void) const {return repBound->isMaxBounded();}

  /** Test on a value: is it in bounds?
   */
  virtual bool isInBounds(double _x)  const {return repBound->isInBounds(_x);}

  /** Put value back into bounds - by folding back and forth
   */
  virtual void foldsInBounds(double & _x) const {return repBound->foldsInBounds(_x);}

  /** Put value back into bounds - by truncating to a boundary value
   */
  virtual void truncate(double & _x)  const {return repBound->truncate(_x);}

  /** get minimum value 
   *  @std::exception if does not exist
   */  
  virtual double minimum()  const {return repBound->minimum();}
  /** get maximum value
   *  @std::exception if does not exist
   */  
  virtual double maximum() const {return repBound->maximum();}
  /** get range
   *  @std::exception if unbounded
   */  
  virtual double range()  const {return repBound->range();}

  /** random generator of uniform numbers in bounds
   * @std::exception if unbounded
   */
  virtual double uniform(eoRng & _rng = eo::rng)  const {return repBound->uniform();}

  /** for memory managements - ugly */
  virtual eoRealBounds * dup() const  {return repBound->dup();}

  /** for efficiency, it's better to use the embedded boud directly */
  const eoRealBounds & theBounds()  const { return *repBound;} 

  /** don't forget the printOn method - 
   * again that of the embedded bound
   */
  virtual void printOn(std::ostream& _os) const
  {
    repBound->printOn(_os);
  }

  /** no readFrom ??? Have to check that later */
  virtual void readFrom(std::istream& _is) 
  {
    std::string s;
    _is >> s;
    if (repBound)
      delete repBound;
    repBound = getBoundsFromString(s);
  }

private:
  // reading from a string
  eoRealBounds * getBoundsFromString(std::string);

  eoRealBounds * repBound;
};


#endif