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/*
* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef otbParser_h
#define otbParser_h
#include "itkLightObject.h"
#include "itkObjectFactory.h"
#include "otb_muparser.h"
namespace otb
{
class ParserImpl;
/** \class Parser
* \brief Definition of the standard floating point parser.
* Standard implementation of the mathematical expressions parser.
*
* \sa BandMathImageFilter
*
*
* \ingroup OTBMathParser
*/
class ITK_EXPORT Parser : public itk::LightObject
{
public:
/** Standard class typedefs. */
typedef Parser Self;
typedef itk::LightObject Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** New macro for creation of through a Smart Pointer */
itkNewMacro(Self);
/** Run-time type information (and related methods) */
itkTypeMacro(Parser, itk::LightObject);
/** Convenient type definitions */
typedef Parser ParserType;
typedef double ValueType;
/** Type for function/number of arguments map */
typedef std::map<std::string, int> FunctionMapType;
/** Set the expression to be parsed */
virtual void SetExpr(const std::string & Expression);
/** Trigger the parsing */
ValueType Eval();
/** Define a variable */
void DefineVar(const std::string &sName, ValueType *fVar);
/** Clear all the defined variables */
void ClearVar();
/** Return the expression to be parsed */
const std::string& GetExpr() const;
/** Return the list of variables */
const std::map<std::string, Parser::ValueType*>& GetVar() const;
/** Return a map of function names and associated number of arguments */
FunctionMapType GetFunList() const;
/** Check Expression **/
bool CheckExpr();
protected:
Parser();
~Parser() override;
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
private:
Parser(const Self &); //purposely not implemented
void operator =(const Self &); //purposely not implemented
typedef itk::SmartPointer<ParserImpl> ParserImplPtr;
ParserImplPtr m_InternalParser;
}; // end class
}//end namespace otb
#endif
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