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 // Created on: 1993-11-04
 // Created by: Christian CAILLET
 // Copyright (c) 1993-1999 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 _IFSelect_SessionDumper_HeaderFile
 #define _IFSelect_SessionDumper_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <Standard_Transient.hxx>
 class IFSelect_SessionFile;
 class TCollection_AsciiString;
 
 
 class IFSelect_SessionDumper;
 DEFINE_STANDARD_HANDLE(IFSelect_SessionDumper, Standard_Transient)
 
 //! A SessionDumper is called by SessionFile. It takes into
 //! account a set of classes (such as Selections, Dispatches ...).
 //! SessionFile writes the Type (as defined by cdl) of each Item
 //! and its general Parameters. It manages the names of the Items.
 //!
 //! A SessionDumper must be able to Write the Parameters which are
 //! own of each Item it takes into account, given its Class, then
 //! to Recognize the Type and Read its Own Parameters to create
 //! an Item of this Type with these own Parameters.
 //!
 //! Then, there must be defined one sub-type of SessionDumper per
 //! consistent set of classes (e.g. a package).
 //!
 //! By Own Parameters, understand Parameters given at Creation Time
 //! if there are, or specific of a given class, apart from those
 //! defined at superclass levels (e.g. Final Selection for a
 //! Dispatch, Input Selection for a SelectExtract or SelectDeduct,
 //! Direct Status for a SelectExtract, etc...).
 //!
 //! The Parameters are those stored in a WorkSession, they can be
 //! of Types : IntParam, HAsciiString (for TextParam), Selection,
 //! Dispatch.
 //!
 //! SessionDumpers are organized in a Library which is used by
 //! SessionFile. They are put at Creation Time in this Library.
 class IFSelect_SessionDumper : public Standard_Transient
 {
 
 public:
 
   
   //! Returns the First item of the Library of Dumper. The Next ones
   //! are then obtained by Next on the returned items
   Standard_EXPORT static Handle(IFSelect_SessionDumper) First();
   
   //! Returns the Next SesionDumper in the Library. Returns a Null
   //! Handle at the End.
   Standard_EXPORT Handle(IFSelect_SessionDumper) Next() const;
   
   //! Writes the Own Parameters of a given Item, if it forecast to
   //! manage its Type.
   //! Returns True if it has recognized the Type of the Item (in
   //! this case, it is assumed to have written the Own Parameters if
   //! there are some), False else : in that case, SessionFile will
   //! try another SessionDumper in the Library.
   //! WriteOwn can use these methods from SessionFile : SendVoid,
   //! SendItem, SendText, and if necessary, WorkSession.
   Standard_EXPORT virtual Standard_Boolean WriteOwn (IFSelect_SessionFile& file, const Handle(Standard_Transient)& item) const = 0;
   
   //! Recognizes a Type (given as <type>) then Creates an Item of
   //! this Type with the Own Parameter, as required.
   //! Returns True if it has recognized the Type (in this case, it
   //! is assumed to have created the Item, returned as <item>),
   //! False else : in that case, SessionFile will try another
   //! SessionDumper in the Library.
   //! ReadOwn can use these methods from SessionFile to access Own
   //! Parameters : NbOwnParams, IsVoid, IsText, TextValue, ItemValue
   Standard_EXPORT virtual Standard_Boolean ReadOwn (IFSelect_SessionFile& file, const TCollection_AsciiString& type, Handle(Standard_Transient)& item) const = 0;
 
 
 
 
   DEFINE_STANDARD_RTTIEXT(IFSelect_SessionDumper,Standard_Transient)
 
 protected:
 
   
   //! The Initialization puts a just created SessionDumper in the
   //! Library of SessionDumper. Then, it suffices to create once
   //! a SessionDumper to fill the Library with it
   Standard_EXPORT IFSelect_SessionDumper();
 
 
 
 private:
 
 
   Handle(IFSelect_SessionDumper) thenext;
 
 
 };
 
 
 
 
 
 
 
 #endif // _IFSelect_SessionDumper_HeaderFile

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