// Created on: 1997-12-09
// Created by: Jean-Louis Frenkel
// Copyright (c) 1997-1999 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 _PCDM_ReadWriter_HeaderFile
#define _PCDM_ReadWriter_HeaderFile

#include <Standard.hxx>
#include <Standard_Type.hxx>

#include <Standard_Transient.hxx>
#include <Standard_Integer.hxx>
#include <PCDM_SequenceOfReference.hxx>
#include <TColStd_SequenceOfExtendedString.hxx>
#include <Storage_OpenMode.hxx>
class TCollection_AsciiString;
class Storage_Data;
class CDM_Document;
class TCollection_ExtendedString;
class Message_Messenger;
class Storage_BaseDriver;


class PCDM_ReadWriter;
DEFINE_STANDARD_HANDLE(PCDM_ReadWriter, Standard_Transient)


class PCDM_ReadWriter : public Standard_Transient
{

public:

  
  //! returns PCDM_ReadWriter_1.
  Standard_EXPORT virtual TCollection_AsciiString Version() const = 0;
  
  Standard_EXPORT virtual void WriteReferenceCounter (const Handle(Storage_Data)& aData, const Handle(CDM_Document)& aDocument) const = 0;
  
  Standard_EXPORT virtual void WriteReferences (const Handle(Storage_Data)& aData, const Handle(CDM_Document)& aDocument, const TCollection_ExtendedString& theReferencerFileName) const = 0;
  
  Standard_EXPORT virtual void WriteExtensions (const Handle(Storage_Data)& aData, const Handle(CDM_Document)& aDocument) const = 0;
  
  Standard_EXPORT virtual void WriteVersion (const Handle(Storage_Data)& aData, const Handle(CDM_Document)& aDocument) const = 0;
  
  Standard_EXPORT virtual Standard_Integer ReadReferenceCounter (const TCollection_ExtendedString& theFileName, const Handle(Message_Messenger)& theMsgDriver) const = 0;
  
  Standard_EXPORT virtual void ReadReferences (const TCollection_ExtendedString& aFileName, PCDM_SequenceOfReference& theReferences, const Handle(Message_Messenger)& theMsgDriver) const = 0;
  
  Standard_EXPORT virtual void ReadExtensions (const TCollection_ExtendedString& aFileName, TColStd_SequenceOfExtendedString& theExtensions, const Handle(Message_Messenger)& theMsgDriver) const = 0;
  
  Standard_EXPORT virtual Standard_Integer ReadDocumentVersion (const TCollection_ExtendedString& aFileName, const Handle(Message_Messenger)& theMsgDriver) const = 0;
  
  Standard_EXPORT static void Open (const Handle(Storage_BaseDriver)& aDriver, 
                                    const TCollection_ExtendedString& aFileName, 
                                    const Storage_OpenMode anOpenMode);
  
  //! returns the convenient Reader for a File.
  Standard_EXPORT static Handle(PCDM_ReadWriter) Reader (const TCollection_ExtendedString& aFileName);
  
  Standard_EXPORT static Handle(PCDM_ReadWriter) Writer();
  
  Standard_EXPORT static void WriteFileFormat (const Handle(Storage_Data)& aData, const Handle(CDM_Document)& aDocument);
  
  //! tries  to get a format  in the  file.  returns an empty
  //! string if the file could not be read or does not have
  //! a FileFormat information.
  Standard_EXPORT static TCollection_ExtendedString FileFormat (const TCollection_ExtendedString& aFileName);

  //! tries  to get a format  from the stream.  returns an empty
  //! string if the file could not be read or does not have
  //! a FileFormat information.
  Standard_EXPORT static TCollection_ExtendedString FileFormat (Standard_IStream& theIStream, Handle(Storage_Data)& theData);



  DEFINE_STANDARD_RTTIEXT(PCDM_ReadWriter,Standard_Transient)

protected:




private:




};







#endif // _PCDM_ReadWriter_HeaderFile