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

  Program:   Visualization Toolkit
  Module:    vtkTableAlgorithm.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.
    
=========================================================================*/
/*-------------------------------------------------------------------------
  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.
-------------------------------------------------------------------------*/
// .NAME vtkTableAlgorithm - Superclass for algorithms that produce only vtkTables as output
//
// .SECTION Description
// vtkTableAlgorithm is a convenience class to make writing algorithms
// easier. It is also designed to help transition old algorithms to the new
// pipeline architecture. There are some assumptions and defaults made by this
// class you should be aware of. This class defaults such that your filter
// will have one input port and one output port. If that is not the case
// simply change it with SetNumberOfInputPorts etc. See this class
// constructor for the default. This class also provides a FillInputPortInfo
// method that by default says that all inputs will be Tree. If that
// isn't the case then please override this method in your subclass. This
// class breaks out the downstream requests into separate functions such as
// ExecuteData and ExecuteInformation.  For new algorithms you should
// implement RequestData( request, inputVec, outputVec) but for older filters
// there is a default implementation that calls the old ExecuteData(output)
// signature. For even older filters that don't implement ExecuteData the
// default implementation calls the even older Execute() signature.
//
// .SECTION Thanks
// Thanks to Brian Wylie for creating this class.

#ifndef __vtkTableAlgorithm_h
#define __vtkTableAlgorithm_h

#include "vtkAlgorithm.h"

class vtkDataSet;
class vtkTable;

class VTK_FILTERING_EXPORT vtkTableAlgorithm : public vtkAlgorithm
{
public:
  static vtkTableAlgorithm *New();
  vtkTypeMacro(vtkTableAlgorithm,vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // see vtkAlgorithm for details
  virtual int ProcessRequest(vtkInformation*,
                             vtkInformationVector**,
                             vtkInformationVector*);

  // Description:
  // Get the output data object for a port on this algorithm.
  vtkTable* GetOutput() { return this->GetOutput(0); }
  vtkTable* GetOutput(int index);

  // Description:
  // Set an input of this algorithm. You should not override these
  // methods because they are not the only way to connect a pipeline.
  // Note that these methods support old-style pipeline connections.
  // When writing new code you should use the more general
  // vtkAlgorithm::SetInputConnection().  These methods transform the
  // input index to the input port index, not an index of a connection
  // within a single port.
  void SetInput(vtkDataObject * obj) { this->SetInput(0, obj); }
  void SetInput(int index, vtkDataObject* obj);

protected:
  vtkTableAlgorithm();
  ~vtkTableAlgorithm();

  // convenience method
  virtual int RequestInformation(vtkInformation* request,
                                 vtkInformationVector** inputVector,
                                 vtkInformationVector* outputVector);

  // Description:
  // This is called by the superclass.
  // This is the method you should override.
  virtual int RequestData(vtkInformation* request,
                          vtkInformationVector** inputVector,
                          vtkInformationVector* outputVector);

  // Description:
  // This is called by the superclass.
  // This is the method you should override.
  virtual int RequestUpdateExtent(vtkInformation*,
                                  vtkInformationVector**,
                                  vtkInformationVector*);

  // see algorithm for more info
  virtual int FillOutputPortInformation(int port, vtkInformation* info);
  virtual int FillInputPortInformation(int port, vtkInformation* info);

private:
  vtkTableAlgorithm(const vtkTableAlgorithm&);  // Not implemented.
  void operator=(const vtkTableAlgorithm&);  // Not implemented.
};

#endif