object-factory.h

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/* -*- 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 OBJECT_FACTORY_H
#define OBJECT_FACTORY_H

#include "attribute-construction-list.h"
#include "object.h"
#include "type-id.h"

namespace ns3 {

class AttributeValue;

class ObjectFactory
{
public:
  ObjectFactory ();
  template <typename... Args>
  ObjectFactory (const std::string& typeId, Args&&... args);

  void SetTypeId (TypeId tid);
  void SetTypeId (const char *tid);
  void SetTypeId (std::string tid);
  bool IsTypeIdSet (void) const;

  template <typename... Args>
  void Set (const std::string &name, const AttributeValue &value, Args&&... args);

  void Set (void)
  { }

  TypeId GetTypeId (void) const;

  Ptr<Object> Create (void) const;
  template <typename T>
  Ptr<T> Create (void) const;

private:
  void DoSet (const std::string &name, const AttributeValue &value);
  friend std::ostream & operator << (std::ostream &os, const ObjectFactory &factory);
  friend std::istream & operator >> (std::istream &is, ObjectFactory &factory);

  TypeId m_tid;
  AttributeConstructionList m_parameters;
};

std::ostream & operator << (std::ostream &os, const ObjectFactory &factory);
std::istream & operator >> (std::istream &is, ObjectFactory &factory);


template <typename T, typename... Args>
Ptr<T>
CreateObjectWithAttributes (Args... args);


ATTRIBUTE_HELPER_HEADER (ObjectFactory);

} // namespace ns3


/***************************************************************
 *  Implementation of the templates declared above.
 ***************************************************************/

namespace ns3 {

template <typename T>
Ptr<T>
ObjectFactory::Create (void) const
{
  Ptr<Object> object = Create ();
  return object->GetObject<T> ();
}

template <typename... Args>
ObjectFactory::ObjectFactory (const std::string& typeId, Args&&... args)
{
  SetTypeId (typeId);
  Set (args...);
}

template <typename... Args>
void
ObjectFactory::Set (const std::string &name, const AttributeValue & value, Args&&... args)
{
  DoSet (name, value);
  Set (args...);
}

template <typename T, typename... Args>
Ptr<T>
CreateObjectWithAttributes (Args... args)
{
  ObjectFactory factory;
  factory.SetTypeId (T::GetTypeId ());
  factory.Set (args...);
  return factory.Create<T> ();
}


} // namespace ns3

#endif /* OBJECT_FACTORY_H */