Common/KWCommon/vtkHashMapIterator.h

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/*=========================================================================

  Module:    $RCSfile: vtkHashMapIterator.h,v $

  Copyright (c) Kitware, Inc.
  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.

=========================================================================*/
#ifndef __vtkHashMapIterator_h
#define __vtkHashMapIterator_h

#include "vtkAbstractIterator.h"

template <class DataType> class vtkVectorIterator;
template <class KeyType, class DataType> class vtkHashMap;
template <class KeyType, class DataType> class vtkAbstractMapItem;

template <class KeyType,class DataType>
class vtkHashMapIterator : public vtkAbstractIterator<KeyType,DataType>
{
  friend class vtkHashMap<KeyType,DataType>;
  virtual const char* GetClassNameInternal() const { return "vtkHashMapIterator"; }

public:

  int GetKey(KeyType&);
  
  int GetData(DataType&);
  
  int GetKeyAndData(KeyType&, DataType&);
  
  int SetData(const DataType&);
  
  void InitTraversal();
  
  int IsDoneWithTraversal();
  
  void GoToNextItem();
  
  void GoToPreviousItem();
  
  void GoToFirstItem();
  
  void GoToLastItem();
  
protected:
  static vtkHashMapIterator<KeyType,DataType> *New(); 
  
  vtkHashMapIterator();
  virtual ~vtkHashMapIterator();
  
  void ScanForward();
  void ScanBackward();
  
  typedef vtkAbstractMapItem<KeyType,DataType> ItemType;
  typedef vtkVectorIterator<ItemType> BucketIterator;
  
  vtkIdType Bucket;
  BucketIterator* Iterator;
  
private:
  vtkHashMapIterator(const vtkHashMapIterator<KeyType,DataType>&); // Not implemented
  void operator=(const vtkHashMapIterator<KeyType,DataType>&); // Not implemented
};

#ifdef VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION
#include "vtkHashMapIterator.txx"
#endif 

#endif

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