mapContext.hpp

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#ifndef _Wolframe_SERIALIZE_MAPCONTEXT_HPP_INCLUDED
#define _Wolframe_SERIALIZE_MAPCONTEXT_HPP_INCLUDED
#include <string>
#include "filter/typedfilter.hpp"
#include "serialize/flags.hpp"

namespace _Wolframe {
namespace serialize {

class Context
{
public:
        struct ElementBuffer
        {
                langbind::FilterBase::ElementType m_type;
                types::VariantConst m_value;

                ElementBuffer()
                        :m_type(langbind::FilterBase::Value)
                        {}
                ElementBuffer( const ElementBuffer& o)
                        :m_type(o.m_type)
                        ,m_value(o.m_value)
                        {}
        };

        Context( Flags::Enum f=Flags::None);
        Context( const Context& o);
        ~Context(){}

        void clear();

        bool flag( Flags::Enum f) const                                 {return ((int)f & (int)m_flags) == (int)f;}
        void setFlags( Flags::Enum f)                                   {int ff=(int)m_flags | (int)f; m_flags=(Flags::Enum)ff;}
        void unsetFlags( Flags::Enum f)                                 {int ff=(int)m_flags - ((int)m_flags & (int)f); m_flags=(Flags::Enum)ff;}

        void setElem( const ElementBuffer& e)
        {
                m_elem = e;
                m_has_elem = true;
        }

        void setElem( langbind::FilterBase::ElementType t)
        {
                m_elem.m_type = t;
                m_elem.m_value.init();
                m_has_elem = true;
        }

        void setElem( langbind::FilterBase::ElementType t, const types::VariantConst& v)
        {
                m_elem.m_type = t;
                m_elem.m_value = v;
                m_has_elem = true;
        }

        template <typename VALTYPE>
        void setElem_( langbind::FilterBase::ElementType t, const VALTYPE& val)
        {
                setElem( t, types::VariantConst( val));
        }

        const ElementBuffer* getElem()
        {
                if (m_has_elem)
                {
                        m_has_elem = false;
                        return &m_elem;
                }
                return 0;
        }

        void setElementUnconsumed()
        {
                m_has_elem = true;
        }

private:
        Flags::Enum m_flags;
        ElementBuffer m_elem;
        bool m_has_elem;
};


}}
#endif