mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-04-07 18:30:55 +03:00
209 lines
7.4 KiB
C++
209 lines
7.4 KiB
C++
// Created on: 1996-12-03
|
|
// 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_Schema_HeaderFile
|
|
#define _Storage_Schema_HeaderFile
|
|
|
|
#include <Standard.hxx>
|
|
#include <Standard_Type.hxx>
|
|
|
|
#include <Storage_MapOfCallBack.hxx>
|
|
#include <Standard_Boolean.hxx>
|
|
#include <TCollection_AsciiString.hxx>
|
|
#include <Storage_HArrayOfSchema.hxx>
|
|
#include <Standard_Transient.hxx>
|
|
#include <TColStd_SequenceOfAsciiString.hxx>
|
|
#include <TColStd_HSequenceOfAsciiString.hxx>
|
|
#include <Storage_SolveMode.hxx>
|
|
#include <Standard_CString.hxx>
|
|
class Storage_CallBack;
|
|
class Storage_StreamFormatError;
|
|
class TCollection_AsciiString;
|
|
class Storage_BaseDriver;
|
|
class Storage_Data;
|
|
class Storage_HeaderData;
|
|
class Storage_TypeData;
|
|
class Storage_RootData;
|
|
class Standard_Persistent;
|
|
|
|
|
|
class Storage_Schema;
|
|
DEFINE_STANDARD_HANDLE(Storage_Schema, Standard_Transient)
|
|
|
|
|
|
//! Root class for basic storage/retrieval algorithms.
|
|
//! A Storage_Schema object processes:
|
|
//! - writing of a set of persistent data into a
|
|
//! container (store mechanism),
|
|
//! - reading of a container to extract all the
|
|
//! contained persistent data (retrieve mechanism).
|
|
//! A Storage_Schema object is based on the data
|
|
//! schema for the persistent data of the application, i.e.:
|
|
//! - the list of all persistent objects which may be
|
|
//! known by the application,
|
|
//! - the organization of their data; a data schema
|
|
//! knows how to browse each persistent object it contains.
|
|
//! During the store or retrieve operation, only
|
|
//! persistent objects known from the data schema
|
|
//! can be processed; they are then stored or
|
|
//! retrieved according to their description in the schema.
|
|
//! A data schema is specific to the object classes to
|
|
//! be read or written. Tools dedicated to the
|
|
//! environment in use allow a description of the
|
|
//! application persistent data structure.
|
|
//! Storage_Schema algorithms are called basic
|
|
//! because they do not support external references
|
|
//! between containers.
|
|
class Storage_Schema : public Standard_Transient
|
|
{
|
|
|
|
public:
|
|
|
|
|
|
//! Builds a storage/retrieval algorithm based on a
|
|
//! given data schema.
|
|
//! Example
|
|
//! For example, if ShapeSchema is the class
|
|
//! inheriting from Storage_Schema and containing
|
|
//! the description of your application data schema,
|
|
//! you create a storage/retrieval algorithm as follows:
|
|
//! Handle(ShapeSchema) s = new
|
|
//! ShapeSchema;
|
|
//! -------- --
|
|
//! USER API -- --------------------------------------------------------------
|
|
//! -------- --
|
|
Standard_EXPORT Storage_Schema();
|
|
|
|
//! returns version of the schema
|
|
Standard_EXPORT void SetVersion (const TCollection_AsciiString& aVersion);
|
|
|
|
//! returns the version of the schema
|
|
Standard_EXPORT TCollection_AsciiString Version() const;
|
|
|
|
//! set the schema's name
|
|
Standard_EXPORT void SetName (const TCollection_AsciiString& aSchemaName);
|
|
|
|
//! returns the schema's name
|
|
Standard_EXPORT TCollection_AsciiString Name() const;
|
|
|
|
//! Writes the data aggregated in aData into the
|
|
//! container defined by the driver s. The storage
|
|
//! operation is performed according to the data
|
|
//! schema with which this algorithm is working.
|
|
//! Note: aData may aggregate several root objects
|
|
//! to be stored together.
|
|
Standard_EXPORT void Write (Storage_BaseDriver& s, const Handle(Storage_Data)& aData) const;
|
|
|
|
//! return a current date string
|
|
Standard_EXPORT static TCollection_AsciiString ICreationDate();
|
|
|
|
//! returns True if theType migration is identified
|
|
//! the callback support provides a way to read a file
|
|
//! with a incomplete schema.
|
|
//! ex. : A file contains 3 types a,b and c.
|
|
//! The application's schema contains only 2
|
|
//! type a and b. If you try to read the file in
|
|
//! the application, you will have an error.To
|
|
//! bypass this problem you can give to your
|
|
//! application's schema a callback used when
|
|
//! the schema dosent know how to handle this
|
|
//! type.
|
|
Standard_EXPORT static Standard_Boolean CheckTypeMigration (const TCollection_AsciiString& theTypeName, TCollection_AsciiString& theNewName);
|
|
|
|
//! add two functions to the callback list
|
|
Standard_EXPORT void AddReadUnknownTypeCallBack (const TCollection_AsciiString& aTypeName, const Handle(Storage_CallBack)& aCallBack);
|
|
|
|
//! remove a callback for a type
|
|
Standard_EXPORT void RemoveReadUnknownTypeCallBack (const TCollection_AsciiString& aTypeName);
|
|
|
|
//! returns a list of type name with installed
|
|
//! callback.
|
|
Standard_EXPORT Handle(TColStd_HSequenceOfAsciiString) InstalledCallBackList() const;
|
|
|
|
//! clear all callback from schema instance.
|
|
Standard_EXPORT void ClearCallBackList();
|
|
|
|
//! install a callback for all unknown type. the
|
|
//! objects with unknown types will be skipped. (look
|
|
//! SkipObject method in BaseDriver)
|
|
Standard_EXPORT void UseDefaultCallBack();
|
|
|
|
//! tells schema to uninstall the default callback.
|
|
Standard_EXPORT void DontUseDefaultCallBack();
|
|
|
|
//! ask if the schema is using the default callback.
|
|
Standard_EXPORT Standard_Boolean IsUsingDefaultCallBack() const;
|
|
|
|
//! overload the default function for build.(use to
|
|
//! set an error message or skip an object while
|
|
//! reading an unknown type).
|
|
Standard_EXPORT void SetDefaultCallBack (const Handle(Storage_CallBack)& f);
|
|
|
|
//! reset the default function defined by Storage
|
|
//! package.
|
|
Standard_EXPORT void ResetDefaultCallBack();
|
|
|
|
//! returns the read function used when the
|
|
//! UseDefaultCallBack() is set.
|
|
Standard_EXPORT Handle(Storage_CallBack) DefaultCallBack() const;
|
|
|
|
void WritePersistentObjectHeader (const Handle(Standard_Persistent)& sp, Storage_BaseDriver& s);
|
|
|
|
void WritePersistentReference (const Handle(Standard_Persistent)& sp, Storage_BaseDriver& s);
|
|
|
|
Standard_EXPORT Standard_Boolean AddPersistent (const Handle(Standard_Persistent)& sp, const Standard_CString tName) const;
|
|
|
|
Standard_EXPORT Standard_Boolean PersistentToAdd (const Handle(Standard_Persistent)& sp) const;
|
|
|
|
|
|
|
|
|
|
DEFINE_STANDARD_RTTIEXT(Storage_Schema,Standard_Transient)
|
|
|
|
protected:
|
|
|
|
Standard_Boolean HasTypeBinding (const TCollection_AsciiString& aTypeName) const;
|
|
|
|
Standard_EXPORT void BindType (const TCollection_AsciiString& aTypeName, const Handle(Storage_CallBack)& aCallBack) const;
|
|
|
|
Standard_EXPORT Handle(Storage_CallBack) TypeBinding (const TCollection_AsciiString& aTypeName) const;
|
|
|
|
|
|
|
|
private:
|
|
|
|
Standard_EXPORT void Clear() const;
|
|
|
|
Standard_EXPORT static void ISetCurrentData (const Handle(Storage_Data)& dData);
|
|
|
|
Standard_EXPORT static Handle(Storage_Data)& ICurrentData();
|
|
|
|
Storage_MapOfCallBack myCallBack;
|
|
Standard_Boolean myCallBackState;
|
|
Handle(Storage_CallBack) myDefaultCallBack;
|
|
TCollection_AsciiString myName;
|
|
TCollection_AsciiString myVersion;
|
|
};
|
|
|
|
|
|
#include <Storage_Schema.lxx>
|
|
|
|
|
|
|
|
|
|
|
|
#endif // _Storage_Schema_HeaderFile
|