text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkExtractArray.h
  
  -------------------------------------------------------------------------
    Copyright 2008 Sandia Corporation.
    Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
    the U.S. Government retains certain rights in this software.
  -------------------------------------------------------------------------
  
    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.
  
  =========================================================================*/
  
  /**
   * @class   vtkExtractArray
   * @brief   Given a vtkArrayData object containing one-or-more
   * vtkArray instances, produces a vtkArrayData containing just one vtkArray,
   * identified by index.
   *
   * @par Thanks:
   * Developed by Timothy M. Shead (tshead@sandia.gov) at Sandia National Laboratories.
  */
  
  #ifndef vtkExtractArray_h
  #define vtkExtractArray_h
  
  #include "vtkFiltersGeneralModule.h" // For export macro
  #include "vtkArrayDataAlgorithm.h"
  
  class VTKFILTERSGENERAL_EXPORT vtkExtractArray : public vtkArrayDataAlgorithm
  {
  public:
    static vtkExtractArray* New();
    vtkTypeMacro(vtkExtractArray, vtkArrayDataAlgorithm);
    void PrintSelf(ostream& os, vtkIndent indent) override;
  
    //@{
    /**
     * Controls which array will be extracted.
     */
    vtkGetMacro(Index, vtkIdType);
    vtkSetMacro(Index, vtkIdType);
    //@}
  
  protected:
    vtkExtractArray();
    ~vtkExtractArray() override;
  
    int FillInputPortInformation(int port, vtkInformation* info) override;
  
    int RequestData(
      vtkInformation*,
      vtkInformationVector**,
      vtkInformationVector*) override;
  
  private:
    vtkExtractArray(const vtkExtractArray&) = delete;
    void operator=(const vtkExtractArray&) = delete;
  
    vtkIdType Index;
  };
  
  #endif
  
  