// Created on: 1999-06-24
// Created by: Sergey ZARITCHNY
// Copyright (c) 1999 Matra Datavision
// 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.

#ifndef _TDF_CopyLabel_HeaderFile
#define _TDF_CopyLabel_HeaderFile

#include "Standard.hxx"
#include "Standard_DefineAlloc.hxx"
#include "Standard_Handle.hxx"

#include "TDF_Label.hxx"
#include "TDF_IDFilter.hxx"
#include "TDF_Attribute.hxx"
#include "NCollection_Map.hxx"
class TDF_RelocationTable;
class TDF_DataSet;

//! This class gives copy of source label hierarchy
class TDF_CopyLabel
{
public:
  DEFINE_STANDARD_ALLOC

  //! Empty constructor
  Standard_EXPORT TDF_CopyLabel();

  //! CopyTool
  Standard_EXPORT TDF_CopyLabel(const TDF_Label& aSource, const TDF_Label& aTarget);

  //! Loads src and tgt labels
  Standard_EXPORT void Load(const TDF_Label& aSource, const TDF_Label& aTarget);

  //! Sets filter
  Standard_EXPORT void UseFilter(const TDF_IDFilter& aFilter);

  //! Check external references and if exist fills the aExternals Map
  Standard_EXPORT static bool ExternalReferences(
    const TDF_Label&                             Lab,
    NCollection_Map<occ::handle<TDF_Attribute>>& aExternals,
    const TDF_IDFilter&                          aFilter);

  //! Check external references and if exist fills the aExternals Map
  Standard_EXPORT static void ExternalReferences(
    const TDF_Label&                             aRefLab,
    const TDF_Label&                             Lab,
    NCollection_Map<occ::handle<TDF_Attribute>>& aExternals,
    const TDF_IDFilter&                          aFilter,
    occ::handle<TDF_DataSet>&                    aDataSet);

  //! performs algorithm of selfcontained copy
  Standard_EXPORT void Perform();

  bool IsDone() const;

  //! returns relocation table
  Standard_EXPORT const occ::handle<TDF_RelocationTable>& RelocationTable() const;

private:
  occ::handle<TDF_RelocationTable>            myRT;
  TDF_Label                                   mySL;
  TDF_Label                                   myTL;
  TDF_IDFilter                                myFilter;
  NCollection_Map<occ::handle<TDF_Attribute>> myMapOfExt;
  bool                                        myIsDone;
};

#include "TDF_CopyLabel.lxx"

#endif // _TDF_CopyLabel_HeaderFile