OCCT

// Created on: 1996-11-25
// Created by: Christophe LEYNADIER
// Copyright (c) 1996-1999 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 _Storage_BaseDriver_HeaderFile
#define _Storage_BaseDriver_HeaderFile

#include <Storage_OpenMode.hxx>
#include <Storage_Data.hxx>
#include <Storage_Position.hxx>
#include <TCollection_AsciiString.hxx>
#include <NCollection_Sequence.hxx>
#include <TCollection_ExtendedString.hxx>

class TCollection_ExtendedString;

//! Root class for drivers. A driver assigns a physical container
//! to data to be stored or retrieved, for instance a file.
//! The FSD package provides two derived concrete classes :
//! -   FSD_File is a general driver which defines a
//! file as the container of data.
class Storage_BaseDriver : public Standard_Transient
{
public:
  DEFINE_STANDARD_RTTIEXT(Storage_BaseDriver, Standard_Transient)

public:
  Standard_EXPORT ~Storage_BaseDriver() override;

  TCollection_AsciiString Name() const { return myName; }

  Storage_OpenMode OpenMode() const { return myOpenMode; }

  Standard_EXPORT static TCollection_AsciiString ReadMagicNumber(Standard_IStream& theIStream);

public:
  //!@name Virtual methods, to be provided by descendants

  Standard_EXPORT virtual Storage_Error Open(const TCollection_AsciiString& aName,
                                             const Storage_OpenMode         aMode) = 0;

  //! returns True if we are at end of the stream
  Standard_EXPORT virtual bool IsEnd() = 0;

  //! return position in the file. Return -1 upon error.
  Standard_EXPORT virtual Storage_Position Tell() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteInfoSection() = 0;

  Standard_EXPORT virtual void WriteInfo(
    const int                                            nbObj,
    const TCollection_AsciiString&                       dbVersion,
    const TCollection_AsciiString&                       date,
    const TCollection_AsciiString&                       schemaName,
    const TCollection_AsciiString&                       schemaVersion,
    const TCollection_ExtendedString&                    appName,
    const TCollection_AsciiString&                       appVersion,
    const TCollection_ExtendedString&                    objectType,
    const NCollection_Sequence<TCollection_AsciiString>& userInfo) = 0;

  Standard_EXPORT virtual Storage_Error EndWriteInfoSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadInfoSection() = 0;

  Standard_EXPORT virtual void ReadInfo(
    int&                                           nbObj,
    TCollection_AsciiString&                       dbVersion,
    TCollection_AsciiString&                       date,
    TCollection_AsciiString&                       schemaName,
    TCollection_AsciiString&                       schemaVersion,
    TCollection_ExtendedString&                    appName,
    TCollection_AsciiString&                       appVersion,
    TCollection_ExtendedString&                    objectType,
    NCollection_Sequence<TCollection_AsciiString>& userInfo) = 0;

  Standard_EXPORT virtual void ReadCompleteInfo(Standard_IStream&          theIStream,
                                                occ::handle<Storage_Data>& theData) = 0;

  Standard_EXPORT virtual Storage_Error EndReadInfoSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteCommentSection() = 0;

  Standard_EXPORT virtual void WriteComment(
    const NCollection_Sequence<TCollection_ExtendedString>& userComments) = 0;

  Standard_EXPORT virtual Storage_Error EndWriteCommentSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadCommentSection() = 0;

  Standard_EXPORT virtual void ReadComment(
    NCollection_Sequence<TCollection_ExtendedString>& userComments) = 0;

  Standard_EXPORT virtual Storage_Error EndReadCommentSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteTypeSection() = 0;

  Standard_EXPORT virtual void SetTypeSectionSize(const int aSize) = 0;

  Standard_EXPORT virtual void WriteTypeInformations(const int                      typeNum,
                                                     const TCollection_AsciiString& typeName) = 0;

  Standard_EXPORT virtual Storage_Error EndWriteTypeSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadTypeSection() = 0;

  Standard_EXPORT virtual int TypeSectionSize() = 0;

  Standard_EXPORT virtual void ReadTypeInformations(int&                     typeNum,
                                                    TCollection_AsciiString& typeName) = 0;

  Standard_EXPORT virtual Storage_Error EndReadTypeSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteRootSection() = 0;

  Standard_EXPORT virtual void SetRootSectionSize(const int aSize) = 0;

  Standard_EXPORT virtual void WriteRoot(const TCollection_AsciiString& rootName,
                                         const int                      aRef,
                                         const TCollection_AsciiString& aType) = 0;

  Standard_EXPORT virtual Storage_Error EndWriteRootSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadRootSection() = 0;

  Standard_EXPORT virtual int RootSectionSize() = 0;

  Standard_EXPORT virtual void ReadRoot(TCollection_AsciiString& rootName,
                                        int&                     aRef,
                                        TCollection_AsciiString& aType) = 0;

  Standard_EXPORT virtual Storage_Error EndReadRootSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteRefSection() = 0;

  Standard_EXPORT virtual void SetRefSectionSize(const int aSize) = 0;

  Standard_EXPORT virtual void WriteReferenceType(const int reference, const int typeNum) = 0;

  Standard_EXPORT virtual Storage_Error EndWriteRefSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadRefSection() = 0;

  Standard_EXPORT virtual int RefSectionSize() = 0;

  Standard_EXPORT virtual void ReadReferenceType(int& reference, int& typeNum) = 0;

  Standard_EXPORT virtual Storage_Error EndReadRefSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginWriteDataSection() = 0;

  Standard_EXPORT virtual void WritePersistentObjectHeader(const int aRef, const int aType) = 0;

  Standard_EXPORT virtual void BeginWritePersistentObjectData() = 0;

  Standard_EXPORT virtual void BeginWriteObjectData() = 0;

  Standard_EXPORT virtual void EndWriteObjectData() = 0;

  Standard_EXPORT virtual void EndWritePersistentObjectData() = 0;

  Standard_EXPORT virtual Storage_Error EndWriteDataSection() = 0;

  Standard_EXPORT virtual Storage_Error BeginReadDataSection() = 0;

  Standard_EXPORT virtual void ReadPersistentObjectHeader(int& aRef, int& aType) = 0;

  Standard_EXPORT virtual void BeginReadPersistentObjectData() = 0;

  Standard_EXPORT virtual void BeginReadObjectData() = 0;

  Standard_EXPORT virtual void EndReadObjectData() = 0;

  Standard_EXPORT virtual void EndReadPersistentObjectData() = 0;

  Standard_EXPORT virtual Storage_Error EndReadDataSection() = 0;

  Standard_EXPORT virtual void SkipObject() = 0;

  Standard_EXPORT virtual Storage_Error Close() = 0;

public:
  //!@name Output methods

  Standard_EXPORT virtual Storage_BaseDriver& PutReference(const int aValue) = 0;

  Standard_EXPORT virtual Storage_BaseDriver& PutCharacter(const char aValue) = 0;

  Storage_BaseDriver& operator<<(const char aValue) { return PutCharacter(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& PutExtCharacter(const char16_t aValue) = 0;

  Storage_BaseDriver& operator<<(const char16_t aValue) { return PutExtCharacter(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& PutInteger(const int aValue) = 0;

  Storage_BaseDriver& operator<<(const int aValue) { return PutInteger(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& PutBoolean(const bool aValue) = 0;

  Storage_BaseDriver& operator<<(const bool aValue) { return PutBoolean(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& PutReal(const double aValue) = 0;

  Storage_BaseDriver& operator<<(const double aValue) { return PutReal(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& PutShortReal(const float aValue) = 0;

  Storage_BaseDriver& operator<<(const float aValue) { return PutShortReal(aValue); }

public:
  //!@name Input methods

  Standard_EXPORT virtual Storage_BaseDriver& GetReference(int& aValue) = 0;

  Standard_EXPORT virtual Storage_BaseDriver& GetCharacter(char& aValue) = 0;

  Storage_BaseDriver& operator>>(char& aValue) { return GetCharacter(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& GetExtCharacter(char16_t& aValue) = 0;

  Storage_BaseDriver& operator>>(char16_t& aValue) { return GetExtCharacter(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& GetInteger(int& aValue) = 0;

  Storage_BaseDriver& operator>>(int& aValue) { return GetInteger(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& GetBoolean(bool& aValue) = 0;

  Storage_BaseDriver& operator>>(bool& aValue) { return GetBoolean(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& GetReal(double& aValue) = 0;

  Storage_BaseDriver& operator>>(double& aValue) { return GetReal(aValue); }

  Standard_EXPORT virtual Storage_BaseDriver& GetShortReal(float& aValue) = 0;

  Storage_BaseDriver& operator>>(float& aValue) { return GetShortReal(aValue); }

protected:
  Standard_EXPORT Storage_BaseDriver();

  void SetName(const TCollection_AsciiString& aName) { myName = aName; }

  void SetOpenMode(const Storage_OpenMode aMode) { myOpenMode = aMode; }

private:
  Storage_OpenMode        myOpenMode;
  TCollection_AsciiString myName;
};

#endif // _Storage_BaseDriver_HeaderFile