vtkReaderAlgorithm.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkReaderAlgorithm.h

  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.

=========================================================================*/
#ifndef vtkReaderAlgorithm_h
#define vtkReaderAlgorithm_h

#include "vtkCommonExecutionModelModule.h" // For export macro
#include "vtkAlgorithm.h"

class VTKCOMMONEXECUTIONMODEL_EXPORT vtkReaderAlgorithm : public vtkAlgorithm
{
public:
  vtkTypeMacro(vtkReaderAlgorithm,vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual vtkDataObject* CreateOutput(vtkDataObject* currentOutput)
  {
    return currentOutput;
  }

  virtual int ReadMetaData(vtkInformation* metadata) = 0;

  virtual int ReadTimeDependentMetaData(
    int /*timestep*/, vtkInformation* /*metadata*/)
  {
    return 1;
  }


  virtual int ReadMesh(
    int piece, int npieces, int nghosts, int timestep,
    vtkDataObject* output) = 0;

  virtual int ReadPoints(
    int piece, int npieces, int nghosts, int timestep,
    vtkDataObject* output) = 0;

  virtual int ReadArrays(
    int piece, int npieces, int nghosts, int timestep,
    vtkDataObject* output) = 0;

protected:
  vtkReaderAlgorithm();
  ~vtkReaderAlgorithm() override;

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

#endif