re-organize the code to avoid link-time errors due to duplicate symbols.
#ifndef ATTRIBUTE_H
#define ATTRIBUTE_H
#include <string>
#include <stdint.h>
#include "ptr.h"
#include "object-base.h"
namespace ns3 {
class AttributeAccessor;
class AttributeChecker;
class Attribute;
class AttributeValue
{
public:
AttributeValue ();
AttributeValue (const AttributeValue &o);
AttributeValue &operator = (const AttributeValue &o);
virtual ~AttributeValue ();
virtual Attribute Copy (void) const = 0;
virtual std::string SerializeToString (Ptr<const AttributeChecker> checker) const = 0;
virtual bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker) = 0;
private:
friend class Attribute;
uint32_t m_count;
};
class Attribute
{
public:
Attribute ();
Attribute (const Attribute &o);
Attribute &operator = (const Attribute &o);
~Attribute ();
Attribute Copy (void) const;
std::string SerializeToString (Ptr<const AttributeChecker> checker) const;
bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker);
template <typename T>
static Attribute Create (void);
template <typename T, typename T1>
static Attribute Create (T1 a1);
template <typename T>
T DynCast (void) const;
template <typename T>
Attribute (Ptr<T> pointer);
template <typename T>
operator Ptr<T> ();
Attribute (const char *value);
Attribute (std::string value);
private:
Attribute (AttributeValue *value);
AttributeValue *m_value;
};
class AttributeAccessor : public ObjectBase
{
public:
AttributeAccessor ();
void Ref (void) const;
void Unref (void) const;
virtual ~AttributeAccessor ();
/**
* \param object the object instance to set the value in
* \param value the value to set
* \returns true if the value is valid and it could be set
* successfully, false otherwise.
*/
virtual bool Set (ObjectBase * object, Attribute value) const = 0;
virtual bool Get (const ObjectBase * object, Attribute value) const = 0;
private:
mutable uint32_t m_count;
};
class AttributeChecker : public ObjectBase
{
public:
AttributeChecker ();
void Ref (void) const;
void Unref (void) const;
virtual ~AttributeChecker ();
virtual bool Check (Attribute value) const = 0;
private:
mutable uint32_t m_count;
};
template <typename T, typename BASE>
Ptr<AttributeChecker>
MakeSimpleAttributeChecker (void);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePtrAccessor (Ptr<U> T::*memberVariable);
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePtrAccessor (void (T::*setter) (Ptr<U>));
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePtrAccessor (Ptr<U> (T::*getter) (void) const);
class PtrChecker : public AttributeChecker {};
template <typename T>
Ptr<AttributeChecker> MakePtrChecker (void);
} // namespace ns3
namespace ns3 {
/********************************************************
* A class used to hold std::string values.
********************************************************/
class StringValue : public AttributeValue
{
public:
StringValue (const char *value);
StringValue (std::string value);
void Set (std::string value);
std::string Get (void) const;
virtual Attribute Copy (void) const;
virtual std::string SerializeToString (Ptr<const AttributeChecker> checker) const;
virtual bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker);
StringValue (Attribute value);
operator Attribute () const;
private:
std::string m_value;
};
/********************************************************
* The class used to access the pointer stored in a
* PtrValue<T> AttributeValue instance.
********************************************************/
class PtrValueBase : public AttributeValue
{
public:
virtual ObjectBase *PeekObjectBase (void) const = 0;
virtual bool SetObjectBase (ObjectBase *object) = 0;
virtual std::string SerializeToString (Ptr<const AttributeChecker> checker) const;
virtual bool DeserializeFromString (std::string value, Ptr<const AttributeChecker> checker);
};
} // namespace ns3
/********************************************************
* Store the content of a Ptr<T> in a AttributeValue
********************************************************/
namespace {
template <typename T>
class PtrValue : public ns3::PtrValueBase
{
public:
PtrValue (ns3::Ptr<T> pointer)
: m_pointer (pointer) {}
virtual ns3::ObjectBase *PeekObjectBase (void) const {
return PeekPointer (m_pointer);
}
virtual bool SetObjectBase (ns3::ObjectBase *object) {
T *ptr = dynamic_cast<T *> (object);
if (ptr == 0)
{
return false;
}
m_pointer = ptr;
return true;
}
virtual ns3::Attribute Copy (void) const {
return ns3::Attribute::Create<PtrValue<T> > (*this);
}
private:
ns3::Ptr<T> m_pointer;
};
template <typename T>
class APtrChecker : public ns3::PtrChecker
{
virtual bool Check (ns3::Attribute val) const {
const ns3::PtrValueBase *value = val.DynCast<const ns3::PtrValueBase *> ();
if (value == 0)
{
return false;
}
if (value->PeekObjectBase () == 0)
{
return true;
}
T *ptr = dynamic_cast<T*> (value->PeekObjectBase ());
if (ptr == 0)
{
return false;
}
return true;
}
};
/********************************************************
* The Accessor associated to
* PtrValue<T>
********************************************************/
template <typename T, typename U>
class PtrAccessor : public ns3::AttributeAccessor
{
public:
virtual ~PtrAccessor () {}
virtual bool Set (ns3::ObjectBase * object, ns3::Attribute val) const {
T *obj = dynamic_cast<T *> (object);
if (obj == 0)
{
return false;
}
const ns3::PtrValueBase *value = val.DynCast<const ns3::PtrValueBase *> ();
if (value == 0)
{
return false;
}
ns3::Ptr<U> ptr = dynamic_cast<U*> (value->PeekObjectBase ());
if (ptr == 0)
{
return false;
}
DoSet (obj, ptr);
return true;
}
virtual bool Get (const ns3::ObjectBase * object, ns3::Attribute val) const {
const T *obj = dynamic_cast<const T *> (object);
if (obj == 0)
{
return false;
}
ns3::PtrValueBase *value = val.DynCast<ns3::PtrValueBase *> ();
if (value == 0)
{
return false;
}
return value->SetObjectBase (PeekPointer (DoGet (obj)));
}
private:
virtual void DoSet (T *object, ns3::Ptr<U> value) const = 0;
virtual ns3::Ptr<U> DoGet (const T *object) const = 0;
};
} // anonymous namespace
/********************************************************
* The implementation of the Attribute
* class template methods.
********************************************************/
namespace ns3 {
template <typename T>
Attribute
Attribute::Create (void)
{
return Attribute (new T ());
}
template <typename T, typename T1>
Attribute
Attribute::Create (T1 a1)
{
return Attribute (new T (a1));
}
template <typename T>
T
Attribute::DynCast (void) const
{
return dynamic_cast<T> (m_value);
}
template <typename T>
Attribute::Attribute (Ptr<T> pointer)
: m_value (new PtrValue<T> (pointer))
{}
template <typename T>
Attribute::operator Ptr<T> ()
{
PtrValueBase *value = DynCast<PtrValueBase *> ();
if (value == 0)
{
return 0;
}
ObjectBase *objectBase = value->PeekObjectBase ();
T *obj = dynamic_cast<T *> (objectBase);
if (obj == 0)
{
return 0;
}
return obj;
}
template <typename T, typename U>
Ptr<const AttributeAccessor>
MakePtrAccessor (Ptr<U> T::*memberVariable)
{
struct MemberVariable : public PtrAccessor<T,U>
{
Ptr<U> T::*m_memberVariable;
virtual MemberVariable *Copy (void) const {
return new MemberVariable (*this);
}
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>
MakePtrAccessor (void (T::*setter) (Ptr<U>))
{
struct MemberMethod : public PtrAccessor<T,U>
{
void (T::*m_setter) (Ptr<U>);
virtual MemberMethod *Copy (void) const {
return new MemberMethod (*this);
}
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>
MakePtrAccessor (Ptr<U> (T::*getter) (void) const)
{
struct MemberMethod : public PtrAccessor<T,U>
{
void (T::*m_getter) (Ptr<U>);
virtual MemberMethod *Copy (void) const {
return new MemberMethod (*this);
}
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>
Ptr<AttributeChecker>
MakePtrChecker (void)
{
return Create<APtrChecker<T> > ();
}
template <typename T, typename BASE>
Ptr<AttributeChecker>
MakeSimpleAttributeChecker (void)
{
struct SimpleAttributeChecker : public BASE
{
virtual bool Check (Attribute value) const {
return value.DynCast<const T *> () != 0;
}
} *checker = new SimpleAttributeChecker ();
return Ptr<AttributeChecker> (checker, false);
}
} // namespace ns3
#endif /* ATTRIBUTE_H */