#ifndef PARAM_SPEC_HELPER_H

#define PARAM_SPEC_HELPER_H

namespace ns3 {

template <typename T, typename U, typename V>

class ParamSpecHelper : public ParamSpec

{

public:

  ParamSpecHelper (V initialValue);

  virtual bool Set (ObjectBase * object, Ptr<const Value> parameter) const;

  virtual bool Get (const ObjectBase * object, Ptr<Value> parameter) const;

  virtual bool Check (Ptr<const Value> parameter) const;

  virtual Ptr<Value> CreateInitialValue (void) const;

private:

  virtual void DoSet (T *object, const V &v) const = 0;

  virtual V DoGet (const T *object) const = 0;

  virtual bool DoCheck (const V &v) const;

  V m_initialValue;

};

template <typename T, typename U, typename V>

class MemberVariableParamSpecHelper : public ParamSpecHelper<T,U,V>

{

public:

  MemberVariableParamSpecHelper (V T::*memberVariable, V initialValue);

private:

  virtual void DoSet (T *object, const V &v) const;

  virtual V DoGet (const T *object) const;

  V T::*m_memberVariable;

};

template <typename T, typename U, typename V>

class MemberMethodParamSpecHelper : public ParamSpecHelper<T,U,V>

{

public:

  MemberMethodParamSpecHelper (void (T::*setter) (V),

			       V (T::*getter) (void) const,

			       V initialValue);

private:

  virtual void DoSet (T *object, const V &v) const;

  virtual V DoGet (const T *object) const;

  void (T::*m_setter) (V);

  V (T::*m_getter) (void) const;

};

template <typename T, typename U, typename V>

class MemberMethodSetterParamSpecHelper : public ParamSpecHelper<T,U,V>

{

public:

  MemberMethodSetterParamSpecHelper (void (T::*setter) (V),

				     V initialValue);

private:

  virtual void DoSet (T *object, const V &v) const;

  virtual V DoGet (const T *object) const;

  void (T::*m_setter) (V);

};

template <typename T, typename U, typename V>

class MemberMethodGetterParamSpecHelper : public ParamSpecHelper<T,U,V>

{

public:

  MemberMethodGetterParamSpecHelper (V (T::*getter) (void) const);

private:

  virtual void DoSet (T *object, const V &v) const;

  virtual V DoGet (const T *object) const;

  V (T::*m_getter) (void) const;

};

} // namespace ns3

/***************************************************************

 *        The implementation of the above class templates.

 ***************************************************************/

namespace ns3 {

template <typename T, typename U, typename V>

ParamSpecHelper<T,U,V>::ParamSpecHelper (V initialValue)

  : m_initialValue (initialValue)

{}

template <typename T, typename U, typename V>

bool 

ParamSpecHelper<T,U,V>::Set (ObjectBase * object, Ptr<const Value> parameter) const

{

  const U *value = dynamic_cast<const U*> (PeekPointer (parameter));

  if (value == 0)

    {

      return false;

    }

  T *obj = dynamic_cast<T *> (object);

  if (obj == 0)

    {

      return false;

    }

  V v = *value;

  DoSet (obj, v);

  return true;

}

template <typename T, typename U, typename V>

bool 

ParamSpecHelper<T,U,V>::Get (const ObjectBase * object, Ptr<Value> parameter) const

{

  U *value = dynamic_cast<U*> (PeekPointer (parameter));

  if (value == 0)

    {

      return false;

    }

  const T *obj = dynamic_cast<const T *> (object);

  if (obj == 0)

    {

      return false;

    }

  V v = DoGet (obj);

  *value = v;

  return true;

}

template <typename T, typename U, typename V>

bool 

ParamSpecHelper<T,U,V>::Check (Ptr<const Value> parameter) const

{

  const U *value = dynamic_cast<const U*> (PeekPointer (parameter));

  if (value == 0)

    {

      return false;

    }

  V v = *value;

  DoCheck (v);

  return true;

}

template <typename T, typename U, typename V>

bool

ParamSpecHelper<T,U,V>::DoCheck (const V &v) const

{

  return true;

}

template <typename T, typename U, typename V>

Ptr<Value>

ParamSpecHelper<T,U,V>::CreateInitialValue (void) const

{

  return Create<U> (m_initialValue);

}

template <typename T, typename U, typename V>

MemberVariableParamSpecHelper<T,U,V>::MemberVariableParamSpecHelper (V T::*memberVariable, V initialValue)

  : ParamSpecHelper<T,U,V> (initialValue),

  m_memberVariable (memberVariable)

{}

template <typename T, typename U, typename V>

void 

MemberVariableParamSpecHelper<T,U,V>::DoSet (T *object, const V &v) const

{

  (object->*m_memberVariable) = v;

}

template <typename T, typename U, typename V>

V 

MemberVariableParamSpecHelper<T,U,V>::DoGet (const T *object) const

{

  return (object->*m_memberVariable);

}

template <typename T, typename U, typename V>

MemberMethodParamSpecHelper<T,U,V>::MemberMethodParamSpecHelper (void (T::*setter) (V),

								 V (T::*getter) (void) const,

								 V initialValue)

  : ParamSpecHelper<T,U,V> (initialValue),

  m_setter (setter),

  m_getter (getter)

{}

template <typename T, typename U, typename V>

void 

MemberMethodParamSpecHelper<T,U,V>::DoSet (T *object, const V &v) const

{

  (object->m_setter) (v);

}

template <typename T, typename U, typename V>

V 

MemberMethodParamSpecHelper<T,U,V>::DoGet (const T *object) const

{

  return (object->*m_getter) ();

}

template <typename T, typename U, typename V>

MemberMethodSetterParamSpecHelper<T,U,V>::MemberMethodSetterParamSpecHelper (void (T::*setter) (V),

									     V initialValue)

  : ParamSpecHelper<T,U,V> (initialValue),

  m_setter (setter)

{}

template <typename T, typename U, typename V>

void 

MemberMethodSetterParamSpecHelper<T,U,V>::DoSet (T *object, const V &v) const

{

  (object->m_setter) (v);

}

template <typename T, typename U, typename V>

V 

MemberMethodSetterParamSpecHelper<T,U,V>::DoGet (const T *object) const

{

  return V ();

}

template <typename T, typename U, typename V>

MemberMethodGetterParamSpecHelper<T,U,V>::MemberMethodGetterParamSpecHelper (V (T::*getter) (void) const)

  : m_getter (getter)

{}

template <typename T, typename U, typename V>

void 

MemberMethodGetterParamSpecHelper<T,U,V>::DoSet (T *object, const V &v) const

{}

template <typename T, typename U, typename V>

V 

MemberMethodGetterParamSpecHelper<T,U,V>::DoGet (const T *object) const

{

  return (object->*m_getter) ();

}

} // namespace ns3

#endif /* PARAM_SPEC_HELPER_H */