get rid of implicit conversion of Attribute to/from Ptr<>. Replace this with an explicit Pointer class.
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2008 INRIA
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#ifndef NS_POINTER_H
#define NS_POINTER_H
#include "attribute.h"
#include "object.h"
namespace ns3 {
class Pointer
{
public:
Pointer ();
Pointer (Ptr<Object> object);
void SetObject (Ptr<Object> object);
Ptr<Object> GetObject (void) const;
template <typename T>
Pointer (const Ptr<T> &object);
template <typename T>
void Set (const Ptr<T> &object);
template <typename T>
Ptr<T> Get (void) const;
template <typename T>
operator Ptr<T> () const;
ATTRIBUTE_CONVERTER_DEFINE (Pointer);
private:
Ptr<Object> m_value;
};
std::ostream & operator << (std::ostream &os, const Pointer &pointer);
std::istream & operator >> (std::istream &is, Pointer &pointer);
ATTRIBUTE_VALUE_DEFINE (Pointer);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> T::*memberVariable);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (void (T::*setter) (Ptr<U>));
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> (T::*getter) (void) const);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (void (T::*setter) (Ptr<U>),
Ptr<U> (T::*getter) (void) const);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> (T::*getter) (void) const,
void (T::*setter) (Ptr<U>));
class PointerChecker : public AttributeChecker {};
template <typename T>
Ptr<AttributeChecker> MakePointerChecker (void);
} // namespace ns3
namespace ns3 {
namespace internal {
template <typename T>
class APointerChecker : public PointerChecker
{
virtual bool Check (Attribute val) const {
const PointerValue *value = val.DynCast<const PointerValue *> ();
if (value == 0)
{
return false;
}
if (value->Get ().GetObject () == 0)
{
return true;
}
T *ptr = dynamic_cast<T*> (PeekPointer (value->Get ().GetObject ()));
if (ptr == 0)
{
return false;
}
return true;
}
virtual std::string GetType (void) const {
// XXX: we should be able to return better information
TypeId tid = T::GetTypeId ();
return "Ptr<" + tid.GetName () + ">";
}
virtual bool HasTypeConstraints (void) const {
return false;
}
virtual std::string GetTypeConstraints (void) const {
return "";
}
virtual Attribute Create (void) const {
return Attribute::Create<PointerValue> ();
}
};
/********************************************************
* The Accessor associated to
* PointerValue
********************************************************/
template <typename T, typename U>
class PointerAccessor : public AttributeAccessor
{
public:
virtual ~PointerAccessor () {}
virtual bool Set (ObjectBase * object, Attribute val) const {
T *obj = dynamic_cast<T *> (object);
if (obj == 0)
{
return false;
}
const PointerValue *value = val.DynCast<const PointerValue *> ();
if (value == 0)
{
return false;
}
Ptr<U> ptr = dynamic_cast<U*> (PeekPointer (value->Get ().GetObject ()));
if (ptr == 0)
{
return false;
}
DoSet (obj, ptr);
return true;
}
virtual bool Get (const ObjectBase * object, Attribute val) const {
const T *obj = dynamic_cast<const T *> (object);
if (obj == 0)
{
return false;
}
PointerValue *value = val.DynCast<PointerValue *> ();
if (value == 0)
{
return false;
}
value->Set (Pointer (DoGet (obj)));
return true;
}
private:
virtual void DoSet (T *object, Ptr<U> value) const = 0;
virtual Ptr<U> DoGet (const T *object) const = 0;
};
} // namespace internal
template <typename T>
Pointer::Pointer (const Ptr<T> &object)
{
m_value = object;
}
template <typename T>
void
Pointer::Set (const Ptr<T> &object)
{
m_value = object;
}
template <typename T>
Ptr<T>
Pointer::Get (void) const
{
T *v = dynamic_cast<T *> (PeekPointer (m_value));
return v;
}
template <typename T>
Pointer::operator Ptr<T> () const
{
return Get<T> ();
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> T::*memberVariable)
{
struct MemberVariable : public internal::PointerAccessor<T,U>
{
Ptr<U> T::*m_memberVariable;
virtual void DoSet (T *object, Ptr<U> value) const {
(object->*m_memberVariable) = value;
}
virtual Ptr<U> DoGet (const T *object) const {
return object->*m_memberVariable;
}
} *spec = new MemberVariable ();
spec->m_memberVariable = memberVariable;
return Ptr<const AttributeAccessor> (spec, false);
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (void (T::*setter) (Ptr<U>))
{
struct MemberMethod : public internal::PointerAccessor<T,U>
{
void (T::*m_setter) (Ptr<U>);
virtual void DoSet (T *object, Ptr<U> value) const {
(object->*m_setter) (value);
}
virtual Ptr<U> DoGet (const T *object) const {
return 0;
//return (object->*m_getter) ();
}
} *spec = new MemberMethod ();
spec->m_setter = setter;
return Ptr<const AttributeAccessor> (spec, false);
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> (T::*getter) (void) const)
{
struct MemberMethod : public internal::PointerAccessor<T,U>
{
Ptr<U> (T::*m_getter) (void) const;
virtual void DoSet (T *object, Ptr<U> value) const {
//(object->*m_setter) (value);
}
virtual Ptr<U> DoGet (const T *object) const {
return (object->*m_getter) ();
}
} *spec = new MemberMethod ();
spec->m_getter = getter;
return Ptr<const AttributeAccessor> (spec, false);
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (void (T::*setter) (Ptr<U>),
Ptr<U> (T::*getter) (void) const)
{
return MakePointerAccessor (getter, setter);
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePointerAccessor (Ptr<U> (T::*getter) (void) const,
void (T::*setter) (Ptr<U>))
{
struct MemberMethod : public internal::PointerAccessor<T,U>
{
void (T::*m_setter) (Ptr<U>);
Ptr<U> (T::*m_getter) (void) const;
virtual void DoSet (T *object, Ptr<U> value) const {
(object->*m_setter) (value);
}
virtual Ptr<U> DoGet (const T *object) const {
return (object->*m_getter) ();
}
} *spec = new MemberMethod ();
spec->m_setter = setter;
spec->m_getter = getter;
return Ptr<const AttributeAccessor> (spec, false);
}
template <typename T>
Ptr<AttributeChecker>
MakePointerChecker (void)
{
return Create<internal::APointerChecker<T> > ();
}
} // namespace ns3
#endif /* NS_POINTER_H */