SundanceEvaluatorFactory.hpp

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// ************************************************************************
// 
//                              Sundance
//                 Copyright (2005) Sandia Corporation
// 
// Copyright (year first published) Sandia Corporation.  Under the terms 
// of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government 
// retains certain rights in this software.
// 
// 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
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//  
// 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
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#ifndef SUNDANCE_EVALUATORFACTORY_H
#define SUNDANCE_EVALUATORFACTORY_H

#include "SundanceDefs.hpp"

namespace Sundance
{
using namespace Sundance;
class Evaluator;
class EvalContext;
class EvaluatableExpr;

using namespace Teuchos;

/**
 *
 */
class EvaluatorFactory 
{
public:
  /** */
  EvaluatorFactory(){;}

  /** */
  virtual ~EvaluatorFactory(){;}

  /** */
  virtual Evaluator* createEvaluator(const EvaluatableExpr* expr,
    const EvalContext& context) const = 0 ;

};
      
      
/**
 *
 */
template <class ExprT, class EvalT>
class GenericEvaluatorFactory : virtual public EvaluatorFactory
{
public:
  /** */
  GenericEvaluatorFactory(){;}

  /** */
  virtual ~GenericEvaluatorFactory(){;}

  /** */
  virtual Evaluator* 
  createEvaluator(const EvaluatableExpr* expr,
    const EvalContext& context) const 
    {
      return new EvalT(dynamic_cast<const ExprT*>(expr), context);
    }
};
}


#endif