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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkCompositeDataIterator.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 vtkCompositeDataIterator - abstract superclass for composite data iterators
// .SECTION Description
// vtkCompositeDataIterator provides an interface for accessing datasets
// in a collection (vtkCompositeDataIterator). Sub-classes provide the
// actual implementation.
#ifndef __vtkCompositeDataIterator_h
#define __vtkCompositeDataIterator_h
#include "vtkObject.h"
class vtkDataObject;
class VTK_FILTERING_EXPORT vtkCompositeDataIterator : public vtkObject
{
public:
vtkTypeRevisionMacro(vtkCompositeDataIterator,vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Move the iterator to the beginning of the collection.
void InitTraversal() { this->GoToFirstItem(); }
// Description:
// Move the iterator to the beginning of the collection.
virtual void GoToFirstItem() = 0;
// Description:
// Move the iterator to the next item in the collection.
virtual void GoToNextItem() = 0;
// Description:
// Test whether the iterator is currently pointing to a valid
// item. Returns 1 for yes, 0 for no.
virtual int IsDoneWithTraversal() = 0;
// Description:
// Get the current item. Valid only when IsDoneWithTraversal()
// returns 1.
virtual vtkDataObject* GetCurrentDataObject() = 0;
protected:
vtkCompositeDataIterator();
virtual ~vtkCompositeDataIterator();
private:
vtkCompositeDataIterator(const vtkCompositeDataIterator&); // Not implemented.
void operator=(const vtkCompositeDataIterator&); // Not implemented.
};
#endif
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