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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkCastToConcrete.h,v $
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.
=========================================================================*/
// .NAME vtkCastToConcrete - works around type-checking limitations
// .SECTION Description
// vtkCastToConcrete is a filter that works around type-checking limitations
// in the filter classes. Some filters generate abstract types on output,
// and cannot be connected to the input of filters requiring a concrete
// input type. For example, vtkElevationFilter generates vtkDataSet for output,
// and cannot be connected to vtkDecimate, because vtkDecimate requires
// vtkPolyData as input. This is true even though (in this example) the input
// to vtkElevationFilter is of type vtkPolyData, and you know the output of
// vtkElevationFilter is the same type as its input.
//
// vtkCastToConcrete performs run-time checking to insure that output type
// is of the right type. An error message will result if you try to cast
// an input type improperly. Otherwise, the filter performs the appropriate
// cast and returns the data.
// .SECTION Caveats
// You must specify the input before you can get the output. Otherwise an
// error results.
// .SECTION See Also
// vtkDataSetAlgorithm vtkPointSetToPointSetFilter
#ifndef __vtkCastToConcrete_h
#define __vtkCastToConcrete_h
#include "vtkDataSetAlgorithm.h"
class VTK_FILTERING_EXPORT vtkCastToConcrete : public vtkDataSetAlgorithm
{
public:
static vtkCastToConcrete *New();
vtkTypeRevisionMacro(vtkCastToConcrete,vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
protected:
vtkCastToConcrete() {};
~vtkCastToConcrete() {};
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *); //insures compatibility; satisfies abstract api in vtkFilter
virtual int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
private:
vtkCastToConcrete(const vtkCastToConcrete&); // Not implemented.
void operator=(const vtkCastToConcrete&); // Not implemented.
};
#endif
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