vtkStreamerBase.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkStreamerBase_h
#define vtkStreamerBase_h
 
#include "vtkAlgorithm.h"
#include "vtkFiltersCoreModule.h" // For export macro
 
VTK_ABI_NAMESPACE_BEGIN
class VTKFILTERSCORE_EXPORT vtkStreamerBase : public vtkAlgorithm
{
public:
  vtkTypeMacro(vtkStreamerBase, vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  vtkTypeBool ProcessRequest(
    vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
protected:
  vtkStreamerBase();
  ~vtkStreamerBase() override;
 
  virtual int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*)
  {
    return 1;
  }
 
  virtual int RequestUpdateExtent(
    vtkInformation*, vtkInformationVector**, vtkInformationVector*) = 0;
 
  virtual int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector);
 
  // This method is called during each execution pass. Subclasses
  // should implement this to do actual work.
  virtual int ExecutePass(
    vtkInformationVector** inputVector, vtkInformationVector* outputVector) = 0;
 
  // This method is called after streaming is completed. Subclasses
  // can override this method to perform cleanup.
  virtual int PostExecute(vtkInformationVector**, vtkInformationVector*) { return 1; }
 
  unsigned int NumberOfPasses;
  unsigned int CurrentIndex;
 
private:
  vtkStreamerBase(const vtkStreamerBase&) = delete;
  void operator=(const vtkStreamerBase&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif //_vtkStreamerBase_h