/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

#include "ns3/core-module.h"

#include "ns3/config-store-module.h"

#include <iostream>

using namespace ns3;

class A : public Object

{

public:

  static TypeId GetTypeId (void) {

    static TypeId tid = TypeId ("ns3::A")

      .SetParent<Object> ()

      .AddAttribute ("TestInt16", "help text",

                     IntegerValue (-2),

                     MakeIntegerAccessor (&A::m_int16),

                     MakeIntegerChecker<int16_t> ())

      ;

      return tid;

    }

  int16_t m_int16;

};

NS_OBJECT_ENSURE_REGISTERED (A);

// Assign a new default value to A::TestInt16 (-5)

// Configure a TestInt16 value for a special instance of A (to -3)

// View the output from the config store

// 

int main (int argc, char *argv[])

{

  Config::SetDefault ("ns3::A::TestInt16", IntegerValue (-5));

  Ptr<A> a_obj = CreateObject<A> ();

  NS_ABORT_MSG_UNLESS (a_obj->m_int16 == -5, "Cannot set A's integer attribute via Config::SetDefault");

  Ptr<A> a2_obj = CreateObject<A> ();

  a2_obj->SetAttribute ("TestInt16", IntegerValue (-3));

  IntegerValue iv;

  a2_obj->GetAttribute ("TestInt16", iv);

  NS_ABORT_MSG_UNLESS (iv.Get () == -3, "Cannot set A's integer attribute via SetAttribute");

  // These test objects are not rooted in any ns-3 configuration namespace.

  // This is usually done automatically for ns3 nodes and channels, but

  // we can establish a new root and anchor one of them there (note; we 

  // can't use two objects of the same type as roots).  Rooting one of these

  // is necessary for it to show up in the config namespace so that

  // ConfigureAttributes() will work below.

  Config::RegisterRootNamespaceObject (a2_obj);

  // Output config store to XML format

  Config::SetDefault ("ns3::ConfigStore::Filename", StringValue ("output-attributes.xml"));

  Config::SetDefault ("ns3::ConfigStore::FileFormat", StringValue ("Xml"));

  Config::SetDefault ("ns3::ConfigStore::Mode", StringValue ("Save"));

  ConfigStore outputConfig;

  outputConfig.ConfigureDefaults ();

  outputConfig.ConfigureAttributes ();

  // Output config store to txt format

  Config::SetDefault ("ns3::ConfigStore::Filename", StringValue ("output-attributes.txt"));

  Config::SetDefault ("ns3::ConfigStore::FileFormat", StringValue ("RawText"));

  Config::SetDefault ("ns3::ConfigStore::Mode", StringValue ("Save"));

  ConfigStore outputConfig2;

  outputConfig2.ConfigureDefaults ();

  outputConfig2.ConfigureAttributes ();

  Simulator::Run ();

  Simulator::Destroy ();

}