dox/Filtering/vtkProcessObject.h

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

  Program:   Visualization Toolkit
  Module:    vtkProcessObject.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 __vtkProcessObject_h
#define __vtkProcessObject_h

#include "vtkAlgorithm.h"

class vtkDataObject;

class VTK_FILTERING_EXPORT vtkProcessObject : public vtkAlgorithm
{
public:
  vtkTypeMacro(vtkProcessObject,vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkDataObject **GetInputs();
  int GetNumberOfInputs();

  void SqueezeInputArray();
  
  void RemoveAllInputs();


  virtual void SetInputConnection(vtkAlgorithmOutput* input) {
    this->vtkAlgorithm::SetInputConnection(input); }
  virtual void SetInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void AddInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void AddInputConnection(vtkAlgorithmOutput* input)
    {
      this->AddInputConnection(0, input);
    }
  virtual void RemoveInputConnection(int port, vtkAlgorithmOutput* input);
  virtual void SetNthInputConnection(int port, int index,
                                     vtkAlgorithmOutput* input);
  virtual void SetNumberOfInputConnections(int port, int n);
protected:
  vtkProcessObject();
  ~vtkProcessObject();

  int NumberOfInputs;
  int NumberOfRequiredInputs;
  vtkDataObject **Inputs;     //An array of the inputs to the filter

  // Called to allocate the input array.  Copies old inputs.
  void SetNumberOfInputs(int num);

  // protected methods for setting inputs.
  virtual void SetNthInput(int num, vtkDataObject *input);
  virtual void AddInput(vtkDataObject *input);
  virtual void RemoveInput(vtkDataObject *input);

  virtual void ReportReferences(vtkGarbageCollector*);

  // Implement methods required by vtkAlgorithm.
  virtual int FillInputPortInformation(int, vtkInformation*);
  virtual int FillOutputPortInformation(int, vtkInformation*);

  // Helper methods for compatibility layer.
  void AddInputInternal(vtkDataObject* input);
  void RemoveInputInternal(vtkDataObject* input);
  void SetupInputs();

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

#endif

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