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Common/vtkInstantiator.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkInstantiator.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00062 #ifndef __vtkInstantiator_h
00063 #define __vtkInstantiator_h
00064 
00065 #include "vtkObject.h"
00066 
00067 // The vtkDebugLeaks singleton must be initialized before and
00068 // destroyed after the vtkInstantiator singleton.
00069 #include "vtkDebugLeaksManager.h" // Needed for proper singleton initialization
00070 
00071 class vtkInstantiatorInitialize;
00072 class vtkInstantiatorHashTable;
00073 
00074 class VTK_COMMON_EXPORT vtkInstantiator : public vtkObject
00075 {
00076 public:
00077   static vtkInstantiator* New();
00078   vtkTypeRevisionMacro(vtkInstantiator,vtkObject);
00079   void PrintSelf(ostream& os, vtkIndent indent);
00080   
00083   static vtkObject* CreateInstance(const char* className);
00084   
00085   //BTX
00086   typedef vtkObject* (*CreateFunction)();
00087 
00089 
00093   static void RegisterInstantiator(const char* className,
00094                                    CreateFunction createFunction);
00096 
00098 
00101   static void UnRegisterInstantiator(const char* className,
00102                                      CreateFunction createFunction);
00103   //ETX
00105   
00106 protected:
00107   vtkInstantiator();
00108   ~vtkInstantiator();
00109   
00110   // Internal storage for registered creation functions.
00111   static vtkInstantiatorHashTable* CreatorTable;
00112   
00113   static void ClassInitialize();
00114   static void ClassFinalize();
00115   
00116   //BTX
00117   friend class vtkInstantiatorInitialize;
00118   //ETX
00119   
00120 private:
00121   vtkInstantiator(const vtkInstantiator&);  // Not implemented.
00122   void operator=(const vtkInstantiator&);  // Not implemented.
00123 };
00124 
00125 //BTX
00126 // Utility class to make sure vtkInstantiator is initialized before it
00127 // is used.
00128 class VTK_COMMON_EXPORT vtkInstantiatorInitialize
00129 {
00130 public:
00131   vtkInstantiatorInitialize();
00132   ~vtkInstantiatorInitialize();
00133 private:
00134   static unsigned int Count;
00135 };
00136 
00137 // This instance will show up in any translation unit that uses
00138 // vtkInstantiator.  It will make sure vtkInstantiator is initialized
00139 // before it is used.
00140 static vtkInstantiatorInitialize vtkInstantiatorInitializer;
00141 //ETX
00142 
00143 #endif