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// $Id$
// $Source$

//@HEADER
// ************************************************************************
//
//            NOX: An Object-Oriented Nonlinear Solver Package
//                 Copyright (2002) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Roger Pawlowski (rppawlo@sandia.gov) or
// Eric Phipps (etphipp@sandia.gov), Sandia National Laboratories.
// ************************************************************************
//  CVS Information
//  $Source$
//  $Author$
//  $Date$
//  $Revision$
// ************************************************************************
//@HEADER

#ifndef NOX_LINESEARCH_FULLSTEP_H
#define NOX_LINESEARCH_FULLSTEP_H

#include "NOX_LineSearch_Generic.H" // base class

namespace NOX {
namespace LineSearch {

//! Simplest line search - always take the full step.
/*!
  This line search can be called via NOX::LineSearch::Manager.

  The following parameters can be specified in the "Full Step" sublist
  of the "Line Search" sublist:

  - "Full Step" - length of a full step (defaults to 1.0)
*/

class FullStep : public Generic {

public:

  //! Constructor
  FullStep(const Teuchos::RCP<NOX::GlobalData>& gd,
       Teuchos::ParameterList& params);

  //! Destructor
  ~FullStep();

  // derived
  bool reset(const Teuchos::RCP<NOX::GlobalData>& gd,
         Teuchos::ParameterList& params);

  // derived
  bool compute(NOX::Abstract::Group& newgrp, double& step,
           const NOX::Abstract::Vector& dir,
           const NOX::Solver::Generic& s);
private:

  //! Full step length
  double stepSize;
};
} // namespace LineSearch
} // namespace NOX

#endif