text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    $RCSfile$
  
    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 vtkInformationRequestKey - Key for pointer to pointer.
  // .SECTION Description
  // vtkInformationRequestKey is used to represent keys for pointer
  // to pointer values in vtkInformation.h
  
  #ifndef __vtkInformationRequestKey_h
  #define __vtkInformationRequestKey_h
  
  #include "vtkInformationKey.h"
  
  #include "vtkCommonInformationKeyManager.h" // Manage instances of this type.
  
  class VTK_COMMON_EXPORT vtkInformationRequestKey : public vtkInformationKey
  {
  public:
    vtkTypeRevisionMacro(vtkInformationRequestKey,vtkInformationKey);
    void PrintSelf(ostream& os, vtkIndent indent);
  
    vtkInformationRequestKey(const char* name, const char* location);
    ~vtkInformationRequestKey();
  
    // Description:
    // Get/Set the value associated with this key in the given
    // information object.
    void Set(vtkInformation* info);
    void Remove(vtkInformation* info);
    int Has(vtkInformation* info);
  
    // Description:
    // Copy the entry associated with this key from one information
    // object to another.  If there is no entry in the first information
    // object for this key, the value is removed from the second.
    virtual void ShallowCopy(vtkInformation* from, vtkInformation* to);
  
    // Description:
    // Print the key's value in an information object to a stream.
    virtual void Print(ostream& os, vtkInformation* info);
  
  private:
    vtkInformationRequestKey(const vtkInformationRequestKey&);  // Not implemented.
    void operator=(const vtkInformationRequestKey&);  // Not implemented.
  };
  
  #endif
  