cppFormFunction.hpp

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#ifndef _Wolframe_serialize_CPP_FORM_FUNCTION_HPP_INCLUDED
#define _Wolframe_serialize_CPP_FORM_FUNCTION_HPP_INCLUDED
#include "serialize/flags.hpp"
#include "serialize/struct/structDescriptionBase.hpp"
#include "serialize/struct/structSerializer.hpp"
#include "serialize/struct/structParser.hpp"
#include "langbind/formFunction.hpp"
#include "processor/procProviderInterface.hpp"
#include "processor/execContext.hpp"
#include "filter/typedfilter.hpp"
#include <boost/shared_ptr.hpp>

namespace _Wolframe {
namespace serialize {

class CppFormFunction;

class ApiFormData
{
public:
        ApiFormData( const serialize::StructDescriptionBase* descr);
        ~ApiFormData();

        void* get() const                                       {return m_data.get();}
        const serialize::StructDescriptionBase* descr() const   {return m_descr;}
        const boost::shared_ptr<void>& data() const             {return m_data;}
private:
        const serialize::StructDescriptionBase* m_descr;        
        boost::shared_ptr<void> m_data;                         
};

class CppFormFunctionClosure
        :public langbind::FormFunctionClosure
{
public:
        CppFormFunctionClosure( const CppFormFunction& f);

        CppFormFunctionClosure( const CppFormFunctionClosure& o);

        bool call();

        void init( proc::ExecContext* c, const langbind::TypedInputFilterR& i, serialize::Flags::Enum flags);

        virtual langbind::TypedInputFilterR result() const      {return m_result;}

private:
        const CppFormFunction* m_func;                  
        int m_state;                                    
        ApiFormData m_param_data;                       
        ApiFormData m_result_data;                      
        langbind::TypedInputFilterR m_result;           
        serialize::StructParser m_parser;               
        proc::ExecContext* m_context;                   
};

class CppFormFunction
        :public langbind::FormFunction
{
public:
        typedef int (*Function)( proc::ExecContext* ctx, void* res, const void* param);

        CppFormFunction()
                :m_function(0)
                ,m_api_param(0)
                ,m_api_result(0){}

        CppFormFunction( const CppFormFunction& o)
                :m_function(o.m_function)
                ,m_api_param(o.m_api_param)
                ,m_api_result(o.m_api_result){}

        CppFormFunction( Function f, const serialize::StructDescriptionBase* p, const serialize::StructDescriptionBase* r)
                :m_function(f)
                ,m_api_param(p)
                ,m_api_result(r)
        {}

        const serialize::StructDescriptionBase* api_param() const
                {return m_api_param;}

        const serialize::StructDescriptionBase* api_result() const
                {return m_api_result;}

        int call( proc::ExecContext* ctx, void* res, const void* param) const
                {return (*m_function)( ctx, res, param);}

        virtual langbind::FormFunctionClosure* createClosure() const
        {
                return new CppFormFunctionClosure( *this);
        }

private:
        Function m_function;                                            
        const serialize::StructDescriptionBase* m_api_param;            
        const serialize::StructDescriptionBase* m_api_result;           
};

typedef boost::shared_ptr<CppFormFunction> CppFormFunctionR;

}}//namespace
#endif