/* -*- 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 ATTRIBUTE_HELPER_H
#define ATTRIBUTE_HELPER_H
#include "attribute.h"
#include "attribute-accessor-helper.h"
#include <sstream>
#include "fatal-error.h"
namespace ns3 {
template <typename T, typename BASE>
Ptr<AttributeChecker>
MakeSimpleAttributeChecker (std::string name, std::string underlying)
{
struct SimpleAttributeChecker : public BASE
{
virtual bool Check (const AttributeValue &value) const {
return dynamic_cast<const T *> (&value) != 0;
}
virtual std::string GetValueTypeName (void) const {
return m_type;
}
virtual bool HasUnderlyingTypeInformation (void) const {
return true;
}
virtual std::string GetUnderlyingTypeInformation (void) const {
return m_underlying;
}
virtual Ptr<AttributeValue> Create (void) const {
return ns3::Create<T> ();
}
virtual bool Copy (const AttributeValue &source, AttributeValue &destination) const {
const T *src = dynamic_cast<const T *> (&source);
T *dst = dynamic_cast<T *> (&destination);
if (src == 0 || dst == 0)
{
return false;
}
*dst = *src;
return true;
}
std::string m_type;
std::string m_underlying;
} *checker = new SimpleAttributeChecker ();
checker->m_type = name;
checker->m_underlying = underlying;
return Ptr<AttributeChecker> (checker, false);
}
}
/**
* \ingroup core
* \defgroup AttributeHelper Attribute Helper
*
* All these macros can be used to generate automatically the code
* for subclasses of AttributeValue, AttributeAccessor, and, AttributeChecker,
* which can be used to give attribute powers to a normal class. i.e.,
* the user class can then effectively be made an attribute.
*
* There are two kinds of helper macros:
* 1) The simple macros.
* 2) The more complex macros.
*
* The simple macros are implemented in terms of the complex
* macros and should generally be preferred over the complex macros:
* - \ref ATTRIBUTE_HELPER_HEADER, and,
* - \ref ATTRIBUTE_HELPER_CPP,
*/
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro defines and generates the code for the implementation
* of the \c Make<type>Accessor template functions. This macro is typically
* invoked in a class header to allow users of this class to view and
* use the template functions defined here. This macro is implemented
* through the helper templates functions ns3::MakeAccessorHelper<>.
*/
#define ATTRIBUTE_ACCESSOR_DEFINE(type) \
template <typename T1> \
Ptr<const AttributeAccessor> Make ## type ## Accessor (T1 a1) \
{ \
return MakeAccessorHelper<type ## Value> (a1); \
} \
template <typename T1, typename T2> \
Ptr<const AttributeAccessor> Make ## type ## Accessor (T1 a1, T2 a2) \
{ \
return MakeAccessorHelper<type ## Value> (a1, a2); \
}
#define ATTRIBUTE_VALUE_DEFINE_WITH_NAME(type,name) \
class name ## Value : public AttributeValue \
{ \
public: \
name ## Value (); \
name ## Value (const type &value); \
void Set (const type &value); \
type Get (void) const; \
template <typename T> \
bool GetAccessor (T &value) const { \
value = T (m_value); \
return true; \
} \
virtual Ptr<AttributeValue> Copy (void) const; \
virtual std::string SerializeToString (Ptr<const AttributeChecker> checker) const; \
virtual bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker); \
private: \
type m_value; \
};
/**
* \ingroup AttributeHelper
* \param type the name of the class.
*
* This macro defines the class \c typeValue associated to class \c type.
* This macro is typically invoked in the class header file.
*/
#define ATTRIBUTE_VALUE_DEFINE(type) \
ATTRIBUTE_VALUE_DEFINE_WITH_NAME (type,type)
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro defines the conversion operators for class \c type to and
* from instances of type Attribute.
* Typically invoked in the class header file.
*/
#define ATTRIBUTE_CONVERTER_DEFINE(type)
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro defines the \c typeChecker class and the associated
* \c Make<type>Checker function.
* Typically invoked in the class header file..
*/
#define ATTRIBUTE_CHECKER_DEFINE(type) \
class type ## Checker : public AttributeChecker {}; \
Ptr<const AttributeChecker> Make ## type ## Checker (void); \
#define ATTRIBUTE_VALUE_IMPLEMENT_WITH_NAME(type,name) \
name ## Value::name ## Value () \
: m_value () {} \
name ## Value::name ## Value (const type &value) \
: m_value (value) {} \
void name ## Value::Set (const type &v) { \
m_value = v; \
} \
type name ## Value::Get (void) const { \
return m_value; \
} \
Ptr<AttributeValue> \
name ## Value::Copy (void) const { \
return ns3::Create<name ## Value> (*this); \
} \
std::string \
name ## Value::SerializeToString (Ptr<const AttributeChecker> checker) const { \
std::ostringstream oss; \
oss << m_value; \
return oss.str (); \
} \
bool \
name ## Value::DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker) { \
std::istringstream iss; \
iss.str (value); \
iss >> m_value; \
return !iss.bad () && !iss.fail (); \
}
/**
* \ingroup AttributeHelper
* \param type the name of the class.
*
* This macro implements the \c typeValue class (including the
* \c typeValue::SerializeToString and \c typeValue::DeserializeFromString
* methods).
* Typically invoked in the source file.
*/
#define ATTRIBUTE_VALUE_IMPLEMENT(type) \
ATTRIBUTE_VALUE_IMPLEMENT_WITH_NAME (type,type)
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro implements the \c Make<type>Checker function.
* Typically invoked in the source file..
*/
#define ATTRIBUTE_CHECKER_IMPLEMENT(type) \
Ptr<const AttributeChecker> Make ## type ## Checker (void) \
{ \
return MakeSimpleAttributeChecker<type ## Value,type ## Checker> (# type "Value", # type); \
} \
#define ATTRIBUTE_CHECKER_IMPLEMENT_WITH_NAME(type,name) \
Ptr<const AttributeChecker> Make ## type ## Checker (void) \
{ \
return MakeSimpleAttributeChecker<type ## Value,type ## Checker> (# type "Value", name); \
} \
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro should be invoked outside of the class
* declaration in its public header.
*/
#define ATTRIBUTE_HELPER_HEADER(type) \
ATTRIBUTE_VALUE_DEFINE (type); \
ATTRIBUTE_ACCESSOR_DEFINE (type); \
ATTRIBUTE_CHECKER_DEFINE (type);
/**
* \ingroup AttributeHelper
* \param type the name of the class
*
* This macro should be invoked from the class implementation file.
*/
#define ATTRIBUTE_HELPER_CPP(type) \
ATTRIBUTE_CHECKER_IMPLEMENT (type); \
ATTRIBUTE_VALUE_IMPLEMENT (type);
#endif /* ATTRIBUTE_HELPER_H */