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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: FunctionExpressionVariable.hpp,v 1.3 2007/05/20 23:15:36 delpinux Exp $
#ifndef FUNCTION_EXPRESSION_VARIABLE_HPP
#define FUNCTION_EXPRESSION_VARIABLE_HPP
#include <Variable.hpp>
#include <FunctionExpression.hpp>
#include <DiscretizationType.hpp>
/**
* @file FunctionExpressionVariable.hpp
* @author Stephane Del Pino
* @date Wed Jul 19 11:44:32 2006
*
* @brief Manages function expression variables
*
*/
class FunctionExpressionVariable
: public FunctionExpression
{
private:
/**
* writes an expression
*
* @param os output stream
*
* @return os
*/
std::ostream& put(std::ostream& os) const;
const std::string __functionName;
ReferenceCounting<FunctionVariable>
__functionVariable; /**< the function variable */
DiscretizationType::Type
__discretizationType; /**< Variables can be related to
discretization types */
public:
/**
* Checks if the variable requires a boundary for evaluation
*
*
* @return @b true if __functionVariable requires a boundary
*/
bool hasBoundaryExpression() const
{
return __functionVariable->expression()->hasBoundaryExpression();
}
/**
* Subscribe the variable
*
*/
void subscribe()
{
__functionVariable->subscribe();
}
/**
* Un-substrcibe the variable
*
*/
void unsubscribe()
{
__functionVariable->unsubscribe();
}
/**
* Read only access to the discretization type
*
* @return __discretizationType
*/
const DiscretizationType::Type&
discretizationType() const
{
return __discretizationType;
}
/**
* Read only access to the variable
*
* @return __functionVariable
*/
ConstReferenceCounting<FunctionVariable>
variable() const;
/**
* Access to the variable
*
* @return __functionVariable
*/
ReferenceCounting<FunctionVariable>
variable();
/**
* Executes the function expression
*
*/
void execute();
/**
* Constructor
*
* @param functionName name of the variable
* @param type a discretization type
*/
FunctionExpressionVariable(const std::string& functionName,
const DiscretizationType::Type& type
= DiscretizationType::lagrangianFEM1);
/**
* Copy constructor
*
* @param functionVariable name of the variable
*/
FunctionExpressionVariable(const FunctionExpressionVariable& functionVariable);
/**
* Destructor
*
*/
~FunctionExpressionVariable();
};
#endif // FUNCTION_EXPRESSION_VARIABLE_HPP
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