type-id.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
 *
 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */
#ifndef TYPE_ID_H
#define TYPE_ID_H

#include "attribute.h"
#include "attribute-accessor-helper.h"
#include "trace-source-accessor.h"
#include "attribute-helper.h"
#include "callback.h"
#include "hash.h"
#include <string>
#include <stdint.h>

namespace ns3 {

class ObjectBase;

class TypeId
{
public:
  enum AttributeFlag {
    ATTR_GET = 1<<0, 
    ATTR_SET = 1<<1, 
    ATTR_CONSTRUCT = 1<<2, 
    ATTR_SGC = ATTR_GET | ATTR_SET | ATTR_CONSTRUCT, 
  };
  struct AttributeInformation {
    std::string name;
    std::string help;
    uint32_t flags;
    Ptr<const AttributeValue> originalInitialValue;
    Ptr<const AttributeValue> initialValue;
    Ptr<const AttributeAccessor> accessor;
    Ptr<const AttributeChecker> checker;
  };
  struct TraceSourceInformation {
    std::string name;
    std::string help;
    Ptr<const TraceSourceAccessor> accessor;
  };

  typedef uint32_t hash_t;

  static TypeId LookupByName (std::string name);
  static bool LookupByNameFailSafe (std::string name, TypeId *tid);
  static TypeId LookupByHash (hash_t hash);
  static bool LookupByHashFailSafe (hash_t hash, TypeId *tid);

  static uint32_t GetRegisteredN (void);
  static TypeId GetRegistered (uint32_t i);

  explicit TypeId (const char * name);

  TypeId GetParent (void) const;

  bool HasParent (void) const;

  bool IsChildOf (TypeId other) const;

  std::string GetGroupName (void) const;

  std::string GetName (void) const;

  hash_t GetHash (void) const;

  bool HasConstructor (void) const;

  uint32_t GetAttributeN (void) const;
  struct TypeId::AttributeInformation GetAttribute(uint32_t i) const;
  std::string GetAttributeFullName (uint32_t i) const;

  Callback<ObjectBase *> GetConstructor (void) const;

  bool MustHideFromDocumentation (void) const;


  uint32_t GetTraceSourceN (void) const;
  struct TypeId::TraceSourceInformation GetTraceSource(uint32_t i) const;

  TypeId SetParent (TypeId tid);
  template <typename T>
  TypeId SetParent (void);

  TypeId SetGroupName (std::string groupName);

  template <typename T>
  TypeId AddConstructor (void);

  TypeId AddAttribute (std::string name,
                       std::string help, 
                       const AttributeValue &initialValue,
                       Ptr<const AttributeAccessor> accessor,
                       Ptr<const AttributeChecker> checker);

  bool SetAttributeInitialValue(uint32_t i, 
                                Ptr<const AttributeValue> initialValue);

  TypeId AddAttribute (std::string name,
                       std::string help, 
                       uint32_t flags,
                       const AttributeValue &initialValue,
                       Ptr<const AttributeAccessor> accessor,
                       Ptr<const AttributeChecker> checker);

  TypeId AddTraceSource (std::string name,
                         std::string help,
                         Ptr<const TraceSourceAccessor> accessor);

  TypeId HideFromDocumentation (void);

  bool LookupAttributeByName (std::string name, struct AttributeInformation *info) const;
  Ptr<const TraceSourceAccessor> LookupTraceSourceByName (std::string name) const;

  uint16_t GetUid (void) const;
  void SetUid (uint16_t tid);

  // construct an invalid TypeId.
  inline TypeId ();
  inline TypeId (const TypeId &o);
  inline TypeId &operator = (const TypeId &o);
  inline ~TypeId ();

private:
  friend class AttributeList;
  friend bool operator == (TypeId a, TypeId b);
  friend bool operator != (TypeId a, TypeId b);
  friend bool operator <  (TypeId a, TypeId b);


  explicit TypeId (uint16_t tid);
  void DoAddConstructor (Callback<ObjectBase *> callback);

  uint16_t m_tid;
};

std::ostream & operator << (std::ostream &os, TypeId tid);
std::istream & operator >> (std::istream &is, TypeId &tid);
inline bool operator == (TypeId a, TypeId b);
inline bool operator != (TypeId a, TypeId b);
bool operator <  (TypeId a, TypeId b);

ATTRIBUTE_HELPER_HEADER (TypeId);

} // namespace ns3 

namespace ns3 {

TypeId::TypeId ()
  : m_tid (0) {
}
TypeId::TypeId (const TypeId &o)
  : m_tid (o.m_tid) {
}
TypeId &TypeId::operator = (const TypeId &o)
{
  m_tid = o.m_tid;
  return *this;
}
TypeId::~TypeId ()
{
}
inline bool operator == (TypeId a, TypeId b)
{
  return a.m_tid == b.m_tid;
}

inline bool operator != (TypeId a, TypeId b)
{
  return a.m_tid != b.m_tid;
}


/*************************************************************************
 *   The TypeId implementation which depends on templates
 *************************************************************************/

template <typename T>
TypeId 
TypeId::SetParent (void)
{
  return SetParent (T::GetTypeId ());
}

template <typename T>
TypeId 
TypeId::AddConstructor (void)
{
  struct Maker {
    static ObjectBase * Create () {
      ObjectBase * base = new T ();
      return base;
    }
  };
  Callback<ObjectBase *> cb = MakeCallback (&Maker::Create);
  DoAddConstructor (cb);
  return *this;
}

} // namespace ns3

#endif /* TYPE_ID_H */