std::string GetDefault (const std::string attributePath)

{

  NS_LOG_FUNCTION (attributePath);

  // Attribute name is last token

  size_t colon = attributePath.rfind ("::");

  const std::string typeName = attributePath.substr (0, colon);

  NS_LOG_DEBUG ("typeName: '" << typeName << "', colon: " << colon);

  TypeId tid;

  if (!TypeId::LookupByNameFailSafe (typeName, &tid))

    {

      NS_FATAL_ERROR ("Unknown type=" << typeName);

    }

  const std::string attrName = attributePath.substr (colon + 2);

  struct TypeId::AttributeInformation info;  

  if (!tid.LookupAttributeByName (attrName, &info))

    {

      NS_FATAL_ERROR ("Attribute not found: " << attributePath);

    }

  std::string defValue = info.initialValue->SerializeToString (info.checker);

  return defValue;

}

/**

 * Get the current default value for an attribute.

 *

 * The current default is the initial value which would be

 * used by new instances of the type, including any

 * CommandLine configuration.

 *

 * \param attributePath The configuration path for the attribute.

 * \returns The default value, serialized to a string.

 */

  std::string GetDefault (const std::string attributePath);