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vtkCastToConcrete.h
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vtkCastToConcrete.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCastToConcrete.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.
=========================================================================*/
/**
* @class vtkCastToConcrete
* @brief works around type-checking limitations
*
* 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 ensure 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.
*
* @warning
* You must specify the input before you can get the output. Otherwise an
* error results.
*
* @sa
* vtkDataSetAlgorithm vtkPointSetToPointSetFilter
*/
#ifndef vtkCastToConcrete_h
#define vtkCastToConcrete_h
#include "vtkCommonExecutionModelModule.h" // For export macro
#include "vtkDataSetAlgorithm.h"
class VTKCOMMONEXECUTIONMODEL_EXPORT vtkCastToConcrete : public vtkDataSetAlgorithm
{
public:
static vtkCastToConcrete* New();
vtkTypeMacro(vtkCastToConcrete, vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
protected:
vtkCastToConcrete() = default;
~vtkCastToConcrete() override = default;
int RequestData(vtkInformation*, vtkInformationVector**,
vtkInformationVector*) override; // insures compatibility; satisfies abstract api in vtkFilter
int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
private:
vtkCastToConcrete(const vtkCastToConcrete&) = delete;
void operator=(const vtkCastToConcrete&) = delete;
};
#endif