text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    $RCSfile: vtkFilteringInformationKeyManager.h,v $
  
    Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
    All rights reserved.
    See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
  
       This software is distributed WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.  See the above copyright notice for more information.
  
  =========================================================================*/
  // .NAME vtkFilteringInformationKeyManager - Manages key types in vtkFiltering.
  // .SECTION Description
  // vtkFilteringInformationKeyManager is included in the header of any
  // subclass of vtkInformationKey defined in the vtkFiltering library.
  // It makes sure that the table of keys is created before and
  // destroyed after it is used.
  
  #ifndef __vtkFilteringInformationKeyManager_h
  #define __vtkFilteringInformationKeyManager_h
  
  #include "vtkSystemIncludes.h"
  
  #include "vtkDebugLeaksManager.h" // DebugLeaks exists longer than info keys.
  
  class vtkInformationKey;
  
  class VTK_FILTERING_EXPORT vtkFilteringInformationKeyManager
  {
  public:
    vtkFilteringInformationKeyManager();
    ~vtkFilteringInformationKeyManager();
  
    // Description:
    // Called by constructors of vtkInformationKey subclasses defined in
    // vtkFiltering to register themselves with the manager.  The
    // instances will be deleted when vtkFiltering is unloaded on
    // program exit.
    static void Register(vtkInformationKey* key);
  
  private:
    static void ClassInitialize();
    static void ClassFinalize();
  };
  
  // This instance will show up in any translation unit that uses key
  // types defined in vtkFiltering or that has a singleton.  It will
  // make sure vtkFilteringInformationKeyManager's vector of keys is
  // initialized before and destroyed after it is used.
  static vtkFilteringInformationKeyManager vtkFilteringInformationKeyManagerInstance;
  
  #endif
  