// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright 2008 Sandia Corporation
// SPDX-License-Identifier: LicenseRef-BSD-3-Clause-Sandia-USGov
/**
 * @class   vtkStringToCategory
 * @brief   Creates a category array from a string array
 *
 *
 * vtkStringToCategory creates an integer array named "category" based on the
 * values in a string array.  You may use this filter to create an array that
 * you may use to color points/cells by the values in a string array.  Currently
 * there is not support to color by a string array directly.
 * The category values will range from zero to N-1,
 * where N is the number of distinct strings in the string array.  Set the string
 * array to process with SetInputArrayToProcess(0,0,0,...).  The array may be in
 * the point, cell, or field data of the data object.
 *
 * The list of unique strings, in the order they are mapped, can also be
 * retrieved from output port 1. They are in a vtkTable, stored in the "Strings"
 * column as a vtkStringArray.
 */

#ifndef vtkStringToCategory_h
#define vtkStringToCategory_h

#include "vtkDataObjectAlgorithm.h"
#include "vtkInfovisCoreModule.h" // For export macro

VTK_ABI_NAMESPACE_BEGIN
class VTKINFOVISCORE_EXPORT vtkStringToCategory : public vtkDataObjectAlgorithm
{
public:
  static vtkStringToCategory* New();
  vtkTypeMacro(vtkStringToCategory, vtkDataObjectAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  ///@{
  /**
   * The name to give to the output vtkIntArray of category values.
   */
  vtkSetStringMacro(CategoryArrayName);
  vtkGetStringMacro(CategoryArrayName);
  ///@}

  /**
   * This is required to capture REQUEST_DATA_OBJECT requests.
   */
  vtkTypeBool ProcessRequest(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;

protected:
  vtkStringToCategory();
  ~vtkStringToCategory() override;

  /**
   * Creates the same output type as the input type.
   */
  int RequestDataObject(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;

  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

  int FillOutputPortInformation(int port, vtkInformation* info) override;

  char* CategoryArrayName;

private:
  vtkStringToCategory(const vtkStringToCategory&) = delete;
  void operator=(const vtkStringToCategory&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif
