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 // Created on: 1992-02-03
 // Created by: Christian CAILLET
 // Copyright (c) 1992-1999 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 _Transfer_ActorOfProcessForFinder_HeaderFile
 #define _Transfer_ActorOfProcessForFinder_HeaderFile
 
 #include <Standard.hxx>
 
 #include <Standard_Transient.hxx>
 #include <Transfer_TransferMapOfProcessForFinder.hxx>
 #include <Message_ProgressRange.hxx>
 
 class Standard_DomainError;
 class Transfer_Finder;
 class Transfer_FindHasher;
 class Transfer_ProcessForFinder;
 class Transfer_IteratorOfProcessForFinder;
 class Transfer_Binder;
 class Transfer_SimpleBinderOfTransient;
 class Standard_Transient;
 
 class Transfer_ActorOfProcessForFinder;
 DEFINE_STANDARD_HANDLE(Transfer_ActorOfProcessForFinder, Standard_Transient)
 
 
 class Transfer_ActorOfProcessForFinder : public Standard_Transient
 {
 
 public:
 
   
   Standard_EXPORT Transfer_ActorOfProcessForFinder();
   
   //! Prerequesite for Transfer : the method Transfer is
   //! called on a starting object only if Recognize has
   //! returned True on it
   //! This allows to define a list of Actors, each one
   //! processing a definite kind of data
   //! TransferProcess calls Recognize on each one before
   //! calling Transfer. But even if Recognize has returned
   //! True, Transfer can reject by returning a Null Binder
   //! (afterwards rejection), the next actor is then invoked
   //!
   //! The provided default returns True, can be redefined
   Standard_EXPORT virtual Standard_Boolean Recognize (const Handle(Transfer_Finder)& start);
   
   //! Specific action of Transfer. The Result is stored in
   //! the returned Binder, or a Null Handle for "No result"
   //! (Default defined as doing nothing; should be deferred)
   //! "mutable" allows the Actor to record intermediate
   //! information, in addition to those of TransferProcess
   Standard_EXPORT virtual Handle(Transfer_Binder) Transferring
                    (const Handle(Transfer_Finder)& start,
                     const Handle(Transfer_ProcessForFinder)& TP,
                     const Message_ProgressRange& theProgress = Message_ProgressRange());
   
   //! Prepares and Returns a Binder for a Transient Result
   //! Returns a Null Handle if <res> is itself Null
   Standard_EXPORT Handle(Transfer_SimpleBinderOfTransient) TransientResult (const Handle(Standard_Transient)& res) const;
   
   //! Returns a Binder for No Result, i.e. a Null Handle
   Standard_EXPORT Handle(Transfer_Binder) NullResult() const;
   
   //! If <mode> is True, commands an Actor to be set at the
   //! end of the list of Actors (see SetNext)
   //! If it is False (creation default), each add Actor is
   //! set at the beginning of the list
   //! This allows to define default Actors (which are Last)
   Standard_EXPORT void SetLast (const Standard_Boolean mode = Standard_True);
   
   //! Returns the Last status (see SetLast).
   Standard_EXPORT Standard_Boolean IsLast() const;
   
   //! Defines a Next Actor : it can then be asked to work if
   //! <me> produces no result for a given type of Object.
   //! If Next is already set and is not "Last", calls
   //! SetNext on it. If Next defined and "Last", the new
   //! actor is added before it in the list
   Standard_EXPORT void SetNext (const Handle(Transfer_ActorOfProcessForFinder)& next);
   
   //! Returns the Actor defined as Next, or a Null Handle
   Standard_EXPORT Handle(Transfer_ActorOfProcessForFinder) Next() const;
 
 
 
 
   DEFINE_STANDARD_RTTI_INLINE(Transfer_ActorOfProcessForFinder,Standard_Transient)
 
 protected:
 
 
 
 
 private:
 
 
   Handle(Transfer_ActorOfProcessForFinder) thenext;
   Standard_Boolean thelast;
 
 
 };
 
 
 
 
 
 
 
 #endif // _Transfer_ActorOfProcessForFinder_HeaderFile

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