// Created on: 2004-11-22
// Created by: Pavel TELKOV
// Copyright (c) 2004-2014 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.

// The original implementation Copyright: (C) RINA S.p.A

#ifndef TObj_Assistant_HeaderFile
#define TObj_Assistant_HeaderFile

#include "Standard_Transient.hxx"
#include "NCollection_Sequence.hxx"
#include "NCollection_IndexedMap.hxx"

class TObj_Model;

//! This class provides interface to the static data
//! to be used during save or load models.
//!
//! Static data:
//! 1. DataMap of Modeller name - handle to model to be used in loading of references
//! 2. Indexed map of Standard_Type to be used during save or load of object type
//! 3. Handle to the current model - model that is loaded at the current moment

class TObj_Assistant
{
public:
  /**
   * Interface for DataMap of Modeller name
   */

  //! Finds model by name
  static Standard_EXPORT occ::handle<TObj_Model> FindModel(const char* const theName);

  //! Binds model to the map
  static Standard_EXPORT void BindModel(const occ::handle<TObj_Model>& theModel);

  //! Clears all records from the model map
  static Standard_EXPORT void ClearModelMap();

public:
  /**
   * Interface for Map of Standard Types
   */

  //! Finds Standard_Type by index;
  //! returns NULL handle if not found
  static Standard_EXPORT occ::handle<Standard_Type> FindType(const int theTypeIndex);

  //! Rinds index by Standard_Type;
  //! returns 0 if not found
  static Standard_EXPORT int FindTypeIndex(const occ::handle<Standard_Type>& theType);

  //! Binds Standard_Type to the map;
  //! returns index of bound type
  static Standard_EXPORT int BindType(const occ::handle<Standard_Type>& theType);

  //! Clears map of types
  static Standard_EXPORT void ClearTypeMap();

public:
  /**
   * Interface to the current model
   */

  //! Sets current model
  static Standard_EXPORT void SetCurrentModel(const occ::handle<TObj_Model>& theModel);

  //! Returns current model
  static Standard_EXPORT occ::handle<TObj_Model> GetCurrentModel();

  //! Unsets current model
  static Standard_EXPORT void UnSetCurrentModel();

public:
  //! Returns the version of application which wrote the currently read document.
  //! Returns 0 if it has not been set yet for the current document.
  static Standard_EXPORT int GetAppVersion();

private:
  //! Method for taking fields for map of models
  static Standard_EXPORT NCollection_Sequence<occ::handle<Standard_Transient>>& getModels();

  //! Method for taking fields for map types
  static Standard_EXPORT NCollection_IndexedMap<occ::handle<Standard_Transient>>& getTypes();

  //! Method for taking fields for the Current model
  static Standard_EXPORT occ::handle<TObj_Model>& getCurrentModel();

  //! Returns application version
  static Standard_EXPORT int& getVersion();
};

#endif

#ifdef _MSC_VER
#pragma once
#endif