src/core/attribute-accessor-helper.h
author Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
Thu, 21 Feb 2008 21:57:38 +0100
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remove accessor BASE arg to MakeAccessorHelper
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#ifndef ATTRIBUTE_ACCESSOR_HELPER_H
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#define ATTRIBUTE_ACCESSOR_HELPER_H
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namespace ns3 {
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template <typename V, typename T1>
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Ptr<const AttributeAccessor>
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MakeAccessorHelper (T1 a1);
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template <typename V, typename T1, typename T2>
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Ptr<const AttributeAccessor>
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MakeAccessorHelper (T1 a1, T2 a2);
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} // namespace ns3
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/***************************************************************
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 *        The implementation of the above functions.
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 ***************************************************************/
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#include "type-traits.h"
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namespace ns3 {
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template <typename T, typename U>
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class AccessorHelper : public AttributeAccessor
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{
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public:
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  AccessorHelper () {}
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  virtual bool Set (ObjectBase * object, Attribute val) const {
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    const U *value = val.DynCast<const U*> ();
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    if (value == 0)
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      {
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	return false;
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      }
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    T *obj = dynamic_cast<T *> (object);
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    if (obj == 0)
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      {
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	return false;
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      }
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    return DoSet (obj, value);
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  }
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  virtual bool Get (const ObjectBase * object, Attribute val) const {
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    U *value = val.DynCast<U*> ();
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    if (value == 0)
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      {
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	return false;
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      }
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    const T *obj = dynamic_cast<const T *> (object);
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    if (obj == 0)
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      {
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	return false;
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      }
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    return DoGet (obj, value);
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  }
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private:
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  virtual bool DoSet (T *object, const U *v) const = 0;
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  virtual bool DoGet (const T *object, U *v) const = 0;
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};
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template <typename V, typename T, typename U>
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Ptr<const AttributeAccessor>
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DoMakeAccessorHelperOne (U T::*memberVariable)
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{
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  class MemberVariable : public AccessorHelper<T,V>
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    {
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    public:
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      MemberVariable (U T::*memberVariable)
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	: AccessorHelper<T,V> (),
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	m_memberVariable (memberVariable)
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	{}
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    private:
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      virtual bool DoSet (T *object, const V *v) const {
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	(object->*m_memberVariable) = U (v->Get ());
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	return true;
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      }
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      virtual bool DoGet (const T *object, V *v) const {
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	v->Set (object->*m_memberVariable);
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	return true;
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      }
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      U T::*m_memberVariable;
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    };
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  return Ptr<const AttributeAccessor> (new MemberVariable (memberVariable), false);
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}
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template <typename V, typename T, typename U>
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Ptr<const AttributeAccessor>
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DoMakeAccessorHelperOne (U (T::*getter) (void) const)
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{
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  class MemberMethod : public AccessorHelper<T,V>
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    {
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    public:
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      MemberMethod (U (T::*getter) (void) const)
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	: AccessorHelper<T,V> (),
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	m_getter (getter)
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	{}
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    private:
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      virtual bool DoSet (T *object, const V *v) const {
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	return false;
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      }
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      virtual bool DoGet (const T *object, V *v) const {
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	v->Set ((object->*m_getter) ());
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	return true;
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      }
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      U (T::*m_getter) (void) const;
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    };
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  return Ptr<const AttributeAccessor> (new MemberMethod (getter), false);
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}
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template <typename V, typename T, typename U>
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Ptr<const AttributeAccessor>
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DoMakeAccessorHelperOne (void (T::*setter) (U))
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{
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  class MemberMethod : public AccessorHelper<T,V>
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    {
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    public:
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      MemberMethod (void (T::*setter) (U))
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	: AccessorHelper<T,V> (),
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	m_setter (setter)
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	{}
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    private:
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      virtual bool DoSet (T *object, const V *v) const {
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	(object->*m_setter) (v->Get ());
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	return true;
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      }
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      virtual void DoGet (const T *object, V *v) const {
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	return false;
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      }
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      void (T::*m_setter) (U);
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    };
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  return Ptr<const AttributeAccessor> (new MemberMethod (setter), false);
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}
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template <typename W, typename T, typename U, typename V>
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Ptr<const AttributeAccessor>
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DoMakeAccessorHelperTwo (void (T::*setter) (U), 
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			  V (T::*getter) (void) const)
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{
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  class MemberMethod : public AccessorHelper<T,W>
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    {
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    public:
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      MemberMethod (void (T::*setter) (U), 
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		    V (T::*getter) (void) const)
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	: AccessorHelper<T,W> (),
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	m_setter (setter),
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	m_getter (getter)
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	{}
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    private:
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      virtual bool DoSet (T *object, const W *v) const {
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	(object->*m_setter) (v->Get ());
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	return true;
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      }
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      virtual bool DoGet (const T *object, W *v) const {
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	v->Set ((object->*m_getter) ());
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	return true;
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      }
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      void (T::*m_setter) (U);
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      V (T::*m_getter) (void) const;
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    };
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  return Ptr<const AttributeAccessor> (new MemberMethod (setter, getter), false);
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}
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template <typename W, typename T, typename U, typename V>
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Ptr<const AttributeAccessor>
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DoMakeAccessorHelperTwo (V (T::*getter) (void) const, 
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			  void (T::*setter) (U))
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{
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  return DoMakeAccessorHelperTwo<W> (setter, getter);
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}
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template <typename V, typename T1>
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Ptr<const AttributeAccessor>
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MakeAccessorHelper (T1 a1)
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{
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  return DoMakeAccessorHelperOne<V> (a1);
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}
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template <typename V, typename T1, typename T2>
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Ptr<const AttributeAccessor>
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MakeAccessorHelper (T1 a1, T2 a2)
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{
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  return DoMakeAccessorHelperTwo<V> (a1, a2);
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}
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} // namespace ns3
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#endif /* ATTRIBUTE_ACCESSOR_HELPER_H */