// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <IGESData_FileProtocol.hxx>
#include <IGESData_Protocol.hxx>
#include <Interface_Protocol.hxx>
#include <Standard_Type.hxx>

IMPLEMENT_STANDARD_RTTIEXT(IGESData_FileProtocol, IGESData_Protocol)

IGESData_FileProtocol::IGESData_FileProtocol() = default;

void IGESData_FileProtocol::Add(const occ::handle<IGESData_Protocol>& protocol)
{
  if (theresource.IsNull())
    theresource = protocol;
  else if (theresource->IsInstance(protocol->DynamicType()))
    return; // passer
  else if (!thenext.IsNull())
    thenext->Add(protocol);
  else
  {
    thenext = new IGESData_FileProtocol;
    thenext->Add(protocol);
  }
}

int IGESData_FileProtocol::NbResources() const
{
  int nb = (theresource.IsNull() ? 0 : 1);
  if (!thenext.IsNull())
    nb += thenext->NbResources();
  return nb;
}

occ::handle<Interface_Protocol> IGESData_FileProtocol::Resource(const int num) const
{
  occ::handle<IGESData_Protocol> res;
  if (num == 1)
    return occ::handle<Interface_Protocol>(theresource);
  else if (!thenext.IsNull())
    return thenext->Resource(num - 1);
  return res; // Null
}
