#ifndef VALUE_HELPER_H

#define VALUE_HELPER_H

#include <sstream>

#include "fatal-error.h"

#define ATTRIBUTE_ACCESSOR_DEFINE(type)					\

  class type##Accessor : public AttributeAccessor {};			\

  template <typename T1>						\

  Ptr<const AttributeAccessor> Make##type##Accessor (T1 a1)		\

  {									\

    return MakeAccessorHelper<type##Accessor,type##Value> (a1);		\

  }									\

  template <typename T1, typename T2>					\

  Ptr<const AttributeAccessor> Make##type##Accessor (T1 a1, T2 a2)	\

  {									\

    return MakeAccessorHelper<type##Accessor,type##Value> (a1, a2);	\

  }

#define ATTRIBUTE_VALUE_DEFINE(type)					\

  class type##Value : public AttributeValue				\

  {									\

  public:								\

    type##Value (const type &value);					\

    void Set (const type &value);					\

    type Get (void) const;						\

    virtual Attribute Copy (void) const;				\

    virtual std::string SerializeToString (Ptr<const AttributeChecker> checker) const; \

    virtual bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker); \

    type##Value (Attribute value);					\

    operator Attribute () const;					\

  private:								\

    type m_value;							\

  };

#define ATTRIBUTE_CONVERTER_DEFINE(type)	\

  type (Attribute value);			\

  operator Attribute () const;

#define ATTRIBUTE_CHECKER_DEFINE(type)				\

  Ptr<const AttributeChecker> Make##type##Checker (void);	\

#define ATTRIBUTE_VALUE_IMPLEMENT(type)					\

  type##Value::type##Value (const type &value)				\

  : m_value (value) {}							\

  void type##Value::Set (const type &v) {				\

    m_value = v;							\

  }									\

  type type##Value::Get (void) const {					\

    return m_value;							\

  }									\

  Attribute								\

  type##Value::Copy (void) const {					\

    return Attribute::Create<type##Value> (*this);			\

  }									\

  std::string								\

  type##Value::SerializeToString (Ptr<const AttributeChecker> checker) const { \

    std::ostringstream oss;						\

    oss << m_value;							\

    return oss.str ();							\

  }									\

  bool									\

  type##Value::DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker) { \

    std::istringstream iss;						\

    iss.str (value);							\

    iss >> m_value;							\

    return !iss.bad () && !iss.fail ();					\

  }									\

  type##Value::type##Value (Attribute value)				\

  {									\

    type##Value *v = value.DynCast<type##Value *> ();			\

    if (v == 0)								\

      {									\

	NS_FATAL_ERROR ("Unexpected type of value. Expected \"" << #type << "Value\""); \

      }									\

    m_value = v->Get ();						\

  }									\

  type##Value::operator Attribute () const				\

  {									\

    return Attribute::Create<type##Value> (*this);			\

  }

#define ATTRIBUTE_CHECKER_IMPLEMENT(type)				\

  Ptr<const AttributeChecker> Make##type##Checker (void)		\

  {									\

    return MakeSimpleAttributeChecker<type##Value> ();			\

  }									\

#define ATTRIBUTE_CONVERTER_IMPLEMENT(type)				\

  type::type (Attribute value)						\

  {									\

    const type##Value *v = value.DynCast<const type##Value *> ();	\

    if (v == 0)								\

      {									\

      NS_FATAL_ERROR ("Unexpected type of value. Expected \"" << #type << "Value\""); \

      }									\

    *this = v->Get ();							\

  }									\

  type::operator Attribute () const					\

  {									\

    return Attribute::Create<type##Value> (*this);			\

  }

#define VALUE_HELPER_HEADER_1(type) \

  ATTRIBUTE_CONVERTER_DEFINE (type)

#define VALUE_HELPER_HEADER_2(type)					\

  ATTRIBUTE_VALUE_DEFINE (type);					\

  ATTRIBUTE_ACCESSOR_DEFINE (type);					\

  ATTRIBUTE_CHECKER_DEFINE (type);

#define VALUE_HELPER_CPP(type)						\

  ATTRIBUTE_CHECKER_IMPLEMENT (type);					\

  ATTRIBUTE_CONVERTER_IMPLEMENT (type);					\

  ATTRIBUTE_VALUE_IMPLEMENT (type);

#endif /* VALUE_HELPER_H */