// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
 * @class   vtkCullerCollection
 * @brief   an ordered list of Cullers
 *
 * vtkCullerCollection represents and provides methods to manipulate a list
 * of Cullers (i.e., vtkCuller and subclasses). The list is ordered and
 * duplicate entries are not prevented.
 *
 * @sa
 * vtkCuller vtkCollection
 */

#ifndef vtkCullerCollection_h
#define vtkCullerCollection_h

#include "vtkCollection.h"
#include "vtkCuller.h"              // for inline functions
#include "vtkRenderingCoreModule.h" // For export macro

VTK_ABI_NAMESPACE_BEGIN
class VTKRENDERINGCORE_EXPORT vtkCullerCollection : public vtkCollection
{
public:
  static vtkCullerCollection* New();
  vtkTypeMacro(vtkCullerCollection, vtkCollection);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Add an Culler to the bottom of the list.
   */
  void AddItem(vtkCuller* a) { this->vtkCollection::AddItem(a); }

  /**
   * Get the next Culler in the list.
   */
  vtkCuller* GetNextItem() { return static_cast<vtkCuller*>(this->GetNextItemAsObject()); }

  /**
   * Get the last Culler in the list.
   */
  vtkCuller* GetLastItem();

  /**
   * Reentrant safe way to get an object in a collection. Just pass the
   * same cookie back and forth.
   */
  vtkCuller* GetNextCuller(vtkCollectionSimpleIterator& cookie)
  {
    return static_cast<vtkCuller*>(this->GetNextItemAsObject(cookie));
  }

protected:
  vtkCullerCollection() = default;
  ~vtkCullerCollection() override = default;

private:
  // hide the standard AddItem from the user and the compiler.
  void AddItem(vtkObject* o) { this->vtkCollection::AddItem(o); }

  vtkCullerCollection(const vtkCullerCollection&) = delete;
  void operator=(const vtkCullerCollection&) = delete;
};

inline vtkCuller* vtkCullerCollection::GetLastItem()
{
  if (this->Bottom == nullptr)
  {
    return nullptr;
  }
  else
  {
    return static_cast<vtkCuller*>(this->Bottom->Item);
  }
}

VTK_ABI_NAMESPACE_END
#endif
