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c99ad5d760
Added possibility to inherit existing attributes if the same persistent fields are used. All methods that allow controlling the data model changes or getting some callbacks may be overridden in successor. They may have same GUIDs as a base class or new ones. Special macros IMPLEMENT_DERIVED_ATTRIBUTE and IMPLEMENT_DERIVED_ATTRIBUTE_WITH_TYPE must be used instead of standard Handle macro definition IMPLEMENT_STANDARD_RTTIEXT to register new derived attributes. Using this improvement several existing attributes from TDataStd, TDataXtd and XCAFDoc packages become inherited from other base attribute-classes. XML and Bin drivers of these attributes are removed. New base attribute classes are added: TDataStd_GenericEmpty and TDataStd_GenericExtString. This improvement does not change both present formats Bin and XML documents. The obsolete Standard scheme is not changed at all.
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
// Created on: 2002-10-29
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// Created by: Michael SAZONOV
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// Copyright (c) 2002-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _BinMDF_ADriver_HeaderFile
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#define _BinMDF_ADriver_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <TCollection_AsciiString.hxx>
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#include <Standard_Transient.hxx>
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#include <Standard_CString.hxx>
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#include <Standard_Type.hxx>
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#include <Standard_Boolean.hxx>
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#include <BinObjMgt_RRelocationTable.hxx>
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#include <BinObjMgt_SRelocationTable.hxx>
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class Message_Messenger;
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class TDF_Attribute;
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class TCollection_AsciiString;
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class BinObjMgt_Persistent;
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class TCollection_ExtendedString;
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class BinMDF_ADriver;
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DEFINE_STANDARD_HANDLE(BinMDF_ADriver, Standard_Transient)
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//! Attribute Storage/Retrieval Driver.
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class BinMDF_ADriver : public Standard_Transient
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{
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public:
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//! Creates a new attribute from TDF.
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Standard_EXPORT virtual Handle(TDF_Attribute) NewEmpty() const = 0;
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//! Returns the type of source object,
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//! inheriting from Attribute from TDF.
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Standard_EXPORT virtual const Handle(Standard_Type)& SourceType() const;
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//! Returns the type name of the attribute object
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const TCollection_AsciiString& TypeName() const;
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//! Translate the contents of <aSource> and put it
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//! into <aTarget>, using the relocation table
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//! <aRelocTable> to keep the sharings.
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Standard_EXPORT virtual Standard_Boolean Paste (const BinObjMgt_Persistent& aSource, const Handle(TDF_Attribute)& aTarget, BinObjMgt_RRelocationTable& aRelocTable) const = 0;
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//! Translate the contents of <aSource> and put it
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//! into <aTarget>, using the relocation table
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//! <aRelocTable> to keep the sharings.
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Standard_EXPORT virtual void Paste (const Handle(TDF_Attribute)& aSource, BinObjMgt_Persistent& aTarget, BinObjMgt_SRelocationTable& aRelocTable) const = 0;
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//! Returns the current message driver of this driver
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const Handle(Message_Messenger)& MessageDriver() const { return myMessageDriver; }
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DEFINE_STANDARD_RTTIEXT(BinMDF_ADriver,Standard_Transient)
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protected:
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Standard_EXPORT BinMDF_ADriver(const Handle(Message_Messenger)& theMsgDriver, const Standard_CString theName = NULL);
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TCollection_AsciiString myTypeName;
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Handle(Message_Messenger) myMessageDriver;
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};
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#include <BinMDF_ADriver.lxx>
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#endif // _BinMDF_ADriver_HeaderFile
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