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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkCellGridQuery
* @brief Perform an operation on cells in a vtkCellMetadata instance.
*
* This is an empty base class that all query types must inherit.
*
* The `vtkCellGrid::Query()` method calls the query's `Initialize()` implementation;
* then loops over all its cell-types (calling the best-matching responder's `Query()`
* method for that cell-type); then calls `Finalize()`.
*
* The responders have an opportunity to modify the state of the query object,
* so these methods are a chance to prepare your query's state and then perform
* reduce-like computations after all the cells have been handled.
*/
#ifndef vtkCellGridQuery_h
#define vtkCellGridQuery_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONDATAMODEL_EXPORT vtkCellGridQuery : public vtkObject
{
public:
vtkTypeMacro(vtkCellGridQuery, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent) override
{
this->Superclass::PrintSelf(os, indent);
}
/// Override this if your query-result state requires initialization.
virtual void Initialize() {}
/// Override this if your query-result state requires finalization.
virtual void Finalize() {}
protected:
vtkCellGridQuery() = default;
~vtkCellGridQuery() override = default;
private:
vtkCellGridQuery(const vtkCellGridQuery&) = delete;
void operator=(const vtkCellGridQuery&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif // vtkCellGridQuery_h
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