normalizeFunction.hpp

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#ifndef _Wolframe_TYPES_NORMALIZE_FUNCTION_HPP_INCLUDED
#define _Wolframe_TYPES_NORMALIZE_FUNCTION_HPP_INCLUDED
#include <string>
#include <vector>
#include <cstring>
#include <stdexcept>
#include <boost/shared_ptr.hpp>

namespace _Wolframe {
namespace types {

class Variant;

class NormalizeFunction
{
public:
        virtual ~NormalizeFunction(){}
        virtual const char* name() const=0;
        virtual Variant execute( const Variant& i) const=0;
        virtual NormalizeFunction* copy() const=0;
};

typedef boost::shared_ptr<NormalizeFunction> NormalizeFunctionR;

class NormalizeResourceHandle
{
public:
        NormalizeResourceHandle(){}
        virtual ~NormalizeResourceHandle(){}
};

typedef boost::shared_ptr<NormalizeResourceHandle> NormalizeResourceHandleR;


typedef const NormalizeResourceHandleR& (*GetNormalizeResourceHandle)();
typedef NormalizeFunction* (*CreateNormalizeFunction)( NormalizeResourceHandle* reshnd, const std::vector<types::Variant>& arg);

class NormalizeFunctionType
{
public:
        explicit NormalizeFunctionType( CreateNormalizeFunction c=0)
                :m_createFunction(c){}
        explicit NormalizeFunctionType( CreateNormalizeFunction c, const NormalizeResourceHandleR& resources_)
                :m_createFunction(c),m_resources(resources_){}
        NormalizeFunctionType( const NormalizeFunctionType& o)
                :m_createFunction(o.m_createFunction),m_resources(o.m_resources){}
        ~NormalizeFunctionType(){}

        NormalizeFunction* createFunction( const std::vector<types::Variant>& arg) const
        {
                if (m_createFunction)
                {
                        return m_createFunction( m_resources.get(), arg);
                }
                else
                {
                        return 0;
                }
                
        }
private:
        CreateNormalizeFunction m_createFunction;
        NormalizeResourceHandleR m_resources;
};




struct NormalizeFunctionMap
{
        virtual ~NormalizeFunctionMap(){}
        virtual const NormalizeFunction* get( const std::string& name) const=0;
};

typedef boost::shared_ptr<NormalizeFunctionMap> NormalizeFunctionMapR;

}}//namespace
#endif