//                                               -*- C++ -*-
/**
 *  @file  BlendedStep.hxx
 *  @brief Implementation of BlendedStep
 *
 *  (C) Copyright 2005-2012 EDF-EADS-Phimeca
 *
 *  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 2.1 of the License.
 *
 *  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
 *
 *  @author slama
 *  @date   2008-11-19 16:10:42 +0100 (mer, 19 nov 2008)
 *  Id      BlendedStep.hxx 1023 2008-11-19 15:10:42Z slama
 */

#ifndef OPENTURNS_BLENDEDSTEP_HXX
#define OPENTURNS_BLENDEDSTEP_HXX

#include "FiniteDifferenceStepImplementation.hxx"
#include "ResourceMap.hxx"

BEGIN_NAMESPACE_OPENTURNS




class BlendedStep
  : public FiniteDifferenceStepImplementation
{
  CLASSNAME;

public:

  /** Default constructor */
  BlendedStep();

  /** Parameters constructor */
  explicit BlendedStep(const NumericalPoint & epsilon,
                       const NumericalScalar eta = ResourceMap::GetAsNumericalScalar( "BlendedStep-DefaultEta" ));

  /** Parameters constructor */
  explicit BlendedStep(const NumericalPoint & epsilon,
                       const NumericalPoint & eta);

  /** String converter */
  virtual String __repr__() const;

  /* Here is the interface that all derived class must implement */

  /** Virtual constructor */
  virtual BlendedStep * clone() const;

  /** Compute step */
  virtual NumericalPoint operator()(const NumericalPoint & inP) const;

  /** Method save() stores the object through the StorageManager */
  void save(Advocate & adv) const;

  /** Method load() reloads the object from the StorageManager */
  void load(Advocate & adv);

  /** Eta accessor */
  void setEta(const NumericalPoint & eta);
  NumericalPoint getEta() const;

protected:
  /** Step offset */
  NumericalPoint eta_;

};

END_NAMESPACE_OPENTURNS




#endif

