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 // Created on: 1993-02-02
 // 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 _Interface_CopyTool_HeaderFile
 #define _Interface_CopyTool_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <Interface_BitMap.hxx>
 #include <Interface_GeneralLib.hxx>
 #include <Standard_Integer.hxx>
 #include <TColStd_SequenceOfInteger.hxx>
 class Interface_InterfaceModel;
 class Interface_CopyControl;
 class Interface_CopyMap;
 class Standard_Transient;
 class Interface_GeneralModule;
 class Interface_Protocol;
 class Interface_EntityIterator;
 
 
 //! Performs Deep Copies of sets of Entities
 //! Allows to perform Copy of Interface Entities from a Model to
 //! another one. Works by calling general services GetFromAnother
 //! and GetImplied.
 //! Uses a CopyMap to bind a unique Result to each Copied Entity
 //!
 //! It is possible to command Copies of Entities (and those they
 //! reference) by call to the General Service Library, or to
 //! enforce results for transfer of some Entities (calling Bind)
 //!
 //! A Same CopyTool can be used for several successive Copies from
 //! the same Model : either by restarting from scratch (e.g. to
 //! copy different parts of a starting Model to several Targets),
 //! or incremental : in that case, it is possible to know what is
 //! the content of the last increment (defined by last call to
 //! ClearLastFlags  and queried by call to LastCopiedAfter)
 //!
 //! Works in two times : first, create the list of copied Entities
 //! second, pushes them to a target Model (manages also Model's
 //! Header) or returns the Result as an Iterator, as desired
 //!
 //! The core action (Copy) works by using ShallowCopy (method
 //! attached to each class) and Copy from GeneralLib (itself using
 //! dedicated tools). It can be redefined for specific actions.
 class Interface_CopyTool 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! Creates a CopyTool adapted to work from a Model. Works
   //! with a General Service Library, given as an argument
   Standard_EXPORT Interface_CopyTool(const Handle(Interface_InterfaceModel)& amodel, const Interface_GeneralLib& lib);
   
   //! Same as above, but Library is defined through a Protocol
   Standard_EXPORT Interface_CopyTool(const Handle(Interface_InterfaceModel)& amodel, const Handle(Interface_Protocol)& protocol);
   
   //! Same as above, but works with the Active Protocol
   Standard_EXPORT Interface_CopyTool(const Handle(Interface_InterfaceModel)& amodel);
   
   //! Returns the Model on which the CopyTool works
   Standard_EXPORT Handle(Interface_InterfaceModel) Model() const;
   
   //! Changes the Map of Result for another one. This allows to work
   //! with a more sophisticated Mapping Control than the Standard
   //! one which is CopyMap (e.g. TransferProcess from Transfer)
   Standard_EXPORT void SetControl (const Handle(Interface_CopyControl)& othermap);
   
   //! Returns the object used for Control
   Standard_EXPORT Handle(Interface_CopyControl) Control() const;
   
   //! Clears Transfer List. Gets Ready to begin another Transfer
   Standard_EXPORT virtual void Clear();
   
   //! Creates the CounterPart of an Entity (by ShallowCopy), Binds
   //! it, then Copies the content of the former Entity to the other
   //! one (same Type), by call to the General Service Library
   //! It may command the Copy of Referenced Entities
   //! Then, its returns True.
   //!
   //! If <mapped> is True, the Map is used to store the Result
   //! Else, the Result is simply produced : it can be used to Copy
   //! internal sub-parts of Entities, which are not intended to be
   //! shared (Strings, Arrays, etc...)
   //! If <errstat> is True, this means that the Entity is recorded
   //! in the Model as Erroneous : in this case, the General Service
   //! for Deep Copy is not called (this could be dangerous) : hence
   //! the Counter-Part is produced but empty, it can be referenced.
   //!
   //! This method does nothing and returns False if the Protocol
   //! does not recognize <ent>.
   //! It basically makes a Deep Copy without changing the Types.
   //! It can be redefined for special uses.
   Standard_EXPORT virtual Standard_Boolean Copy (const Handle(Standard_Transient)& entfrom, Handle(Standard_Transient)& entto, const Standard_Boolean mapped, const Standard_Boolean errstat);
   
   //! Transfers one Entity, if not yet bound to a result
   //! Remark : For an Entity which is reported in the Starting Model,
   //! the ReportEntity will also be copied with its Content if it
   //! has one (at least ShallowCopy; Complete Copy if the Protocol
   //! recognizes the Content : see method Copy)
   Standard_EXPORT Handle(Standard_Transient) Transferred (const Handle(Standard_Transient)& ent);
   
   //! Defines a Result for the Transfer of a Starting object.
   //! Used by method Transferred (which performs a normal Copy),
   //! but can also be called to enforce a result : in the latter
   //! case, the enforced result must be compatible with the other
   //! Transfers which are performed
   Standard_EXPORT void Bind (const Handle(Standard_Transient)& ent, const Handle(Standard_Transient)& res);
   
   //! Search for the result of a Starting Object (i.e. an Entity)
   //! Returns True  if a  Result is Bound (and fills "result")
   //! Returns False if no result is Bound
   Standard_EXPORT Standard_Boolean Search (const Handle(Standard_Transient)& ent, Handle(Standard_Transient)& res) const;
   
   //! Clears LastFlags only. This allows to know what Entities are
   //! copied after its call (see method LastCopiedAfter). It can be
   //! used when copies are done by increments, which must be
   //! distinghished. ClearLastFlags is also called by Clear.
   Standard_EXPORT void ClearLastFlags();
   
   //! Returns an copied Entity and its Result which were operated
   //! after last call to ClearLastFlags. It returns the first
   //! "Last Copied Entity" which Number follows <numfrom>, Zero if
   //! none. It is used in a loop as follow :
   //! Integer num = 0;
   //! while ( (num = CopyTool.LastCopiedAfter(num,ent,res)) ) {
   //! .. Process Starting <ent> and its Result <res>
   //! }
   Standard_EXPORT Standard_Integer LastCopiedAfter (const Standard_Integer numfrom, Handle(Standard_Transient)& ent, Handle(Standard_Transient)& res) const;
   
   //! Transfers one Entity and records result into the Transfer List
   //! Calls method Transferred
   Standard_EXPORT void TransferEntity (const Handle(Standard_Transient)& ent);
   
   //! Renews the Implied References. These References do not involve
   //! Copying of referenced Entities. For such a Reference, if the
   //! Entity which defines it AND the referenced Entity are both
   //! copied, then this Reference is renewed. Else it is deleted in
   //! the copied Entities.
   //! Remark : this concerns only some specific references, such as
   //! "back pointers".
   Standard_EXPORT void RenewImpliedRefs();
   
   //! Fills a Model with the result of the transfer (TransferList)
   //! Commands copy of Header too, and calls RenewImpliedRefs
   Standard_EXPORT void FillModel (const Handle(Interface_InterfaceModel)& bmodel);
   
   //! Returns the complete list of copied Entities
   //! If <withreports> is given True, the entities which were
   //! reported in the Starting Model are replaced in the list
   //! by the copied ReportEntities
   Standard_EXPORT Interface_EntityIterator CompleteResult (const Standard_Boolean withreports = Standard_False) const;
   
   //! Returns the list of Root copied Entities (those which were
   //! asked for copy by the user of CopyTool, not by copying
   //! another Entity)
   Standard_EXPORT Interface_EntityIterator RootResult (const Standard_Boolean withreports = Standard_False) const;
   Standard_EXPORT virtual ~Interface_CopyTool();
 
 
 
 
 protected:
 
   
   //! Creates a new void instance (just created) of the same class
   //! as <entfrom>. Uses the general service GeneralModule:NewVoid
   //! Returns True if OK (Recognize has succeeded), False else
   //! (in such a case, the standard method ShallowCopy is called
   //! to produce <ento> from <entfrom> : hence it is not void)
   //!
   //! No mapping is managed by this method
   Standard_EXPORT virtual Standard_Boolean NewVoid (const Handle(Standard_Transient)& entfrom, Handle(Standard_Transient)& entto);
 
 
   Interface_GeneralLib thelib;
 
 
 private:
 
   
   //! Renews the Implied References of one already Copied Entity
   Standard_EXPORT virtual void Implied (const Handle(Standard_Transient)& entfrom, const Handle(Standard_Transient)& entto);
 
 
   Handle(Interface_InterfaceModel) themod;
   Handle(Interface_CopyControl) themap;
   Handle(Interface_CopyMap) therep;
   Interface_BitMap thelst;
   Standard_Integer thelev;
   TColStd_SequenceOfInteger therts;
   Standard_Boolean theimp;
   Handle(Standard_Transient) theent;
   Handle(Interface_GeneralModule) themdu;
   Standard_Integer theCN;
 
 
 };
 
 
 
 
 
 
 
 #endif // _Interface_CopyTool_HeaderFile

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