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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCompositeDataIterator.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.
=========================================================================*/
// .NAME vtkCompositeDataIterator - superclass for composite data iterators
// .SECTION Description
// vtkCompositeDataIterator provides an interface for accessing datasets
// in a collection (vtkCompositeDataIterator).
#ifndef vtkCompositeDataIterator_h
#define vtkCompositeDataIterator_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
class vtkCompositeDataSet;
class vtkCompositeDataSetInternals;
class vtkCompositeDataSetIndex;
class vtkDataObject;
class vtkInformation;
class VTKCOMMONDATAMODEL_EXPORT vtkCompositeDataIterator : public vtkObject
{
public:
vtkTypeMacro(vtkCompositeDataIterator, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set the composite dataset this iterator is iterating over.
// Must be set before traversal begins.
virtual void SetDataSet(vtkCompositeDataSet* ds);
vtkGetObjectMacro(DataSet, vtkCompositeDataSet);
// Description:
// Begin iterating over the composite dataset structure.
virtual void InitTraversal();
// Description:
// Begin iterating over the composite dataset structure in reverse order.
virtual void InitReverseTraversal();
// 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 finished with the traversal.
// Returns 1 for yes, and 0 for no.
// It is safe to call any of the GetCurrent...() methods only when
// IsDoneWithTraversal() returns 0.
virtual int IsDoneWithTraversal() =0;
// Description:
// Returns the current item. Valid only when IsDoneWithTraversal() returns 0.
virtual vtkDataObject* GetCurrentDataObject() = 0;
// Description:
// Returns the meta-data associated with the current item. This will allocate
// a new vtkInformation object is none is already present. Use
// HasCurrentMetaData to avoid unnecessary creation of vtkInformation objects.
virtual vtkInformation* GetCurrentMetaData() =0;
// Description:
// Returns if the a meta-data information object is present for the current
// item. Return 1 on success, 0 otherwise.
virtual int HasCurrentMetaData() =0;
// Description:
// If SkipEmptyNodes is true, then NULL datasets will be skipped. Default is
// true.
vtkSetMacro(SkipEmptyNodes, int);
vtkGetMacro(SkipEmptyNodes, int);
vtkBooleanMacro(SkipEmptyNodes, int);
// Description:
// Flat index is an index to identify the data in a composite data structure
virtual unsigned int GetCurrentFlatIndex()=0;
// Description:
// Returns if the iteration is in reverse order.
vtkGetMacro(Reverse, int);
//BTX
protected:
vtkCompositeDataIterator();
virtual ~vtkCompositeDataIterator();
int SkipEmptyNodes;
int Reverse;
vtkCompositeDataSet* DataSet;
private:
vtkCompositeDataIterator(const vtkCompositeDataIterator&); // Not implemented.
void operator=(const vtkCompositeDataIterator&); // Not implemented.
//ETX
};
#endif
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