customDataNormalizer.hpp

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#ifndef _Wolframe_TYPES_CUSTOM_DATA_NORMALIZER_HPP_INCLUDED
#define _Wolframe_TYPES_CUSTOM_DATA_NORMALIZER_HPP_INCLUDED
#include "types/customDataType.hpp"
#include "types/normalizeFunction.hpp"
#include "types/variant.hpp"
#include <string>
#include <vector>

namespace _Wolframe {
namespace types {

class CustomDataNormalizer
        :public types::NormalizeFunction
{
public:
        CustomDataNormalizer( const CustomDataNormalizer& o)
                :m_name(o.m_name)
                ,m_type(o.m_type)
                ,m_initializer(o.m_initializer)
        {}
        CustomDataNormalizer( const std::string& name_, const std::vector<types::Variant>& arg, const types::CustomDataType* type_)
                :m_name(name_)
                ,m_type(type_)
                ,m_initializer(type_->hasInitializer()?type_->createInitializer(arg):0)
        {
                if (!arg.empty() && !type_->hasInitializer())
                {
                        throw std::runtime_error("arguments passed to custom data type without initializer defined");
                }
        }

        virtual ~CustomDataNormalizer()
        {
                if (m_initializer) delete m_initializer;
        }

        virtual const char* name() const
        {
                return m_name.c_str();
        }

        const types::CustomDataType* type() const
        {
                return m_type;
        }

        types::Variant execute( const types::Variant& i) const
        {
                types::Variant rt( m_type, m_initializer);
                if (i.defined())
                {
                        rt.data().value.Custom->assign( i);
                }
                return rt;
        }

        virtual types::NormalizeFunction* copy() const
        {
                return new CustomDataNormalizer(*this);
        }

private:
        std::string m_name;
        const types::CustomDataType* m_type;
        types::CustomDataInitializer* m_initializer;
};


class CustomDataMethodCallNormalizer
        :public types::NormalizeFunction
{
public:
        CustomDataMethodCallNormalizer( const CustomDataMethodCallNormalizer& o)
                :m_name(o.m_name)
                ,m_arg(o.m_arg)
        {}
        CustomDataMethodCallNormalizer( const std::string& name_, const std::vector<types::Variant>& arg_)
                :m_name(name_)
                ,m_arg(arg_)
        {}

        virtual ~CustomDataMethodCallNormalizer()
        {}

        virtual const char* name() const
        {
                return m_name.c_str();
        }

        types::Variant execute( const types::Variant& i) const
        {
                const CustomDataValue* cv = i.customref();
                const CustomDataType* dt = cv->type();
                CustomDataType::CustomDataValueMethod method = dt->getMethod( m_name);
                if (!method) throw std::logic_error( "internal: calling undefined method");
                return method( *cv, m_arg);
        }

        virtual types::NormalizeFunction* copy() const
        {
                return new CustomDataMethodCallNormalizer(*this);
        }

private:
        std::string m_name;
        std::vector<types::Variant> m_arg;
};

}}//namespace
#endif