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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkLeafTreeIterator.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:40 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef __itkLeafTreeIterator_h |
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#define __itkLeafTreeIterator_h |
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#include <itkTreeIteratorBase.h> |
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#include <itkPreOrderTreeIterator.h> |
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NMS |
namespace itk{ |
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template <class TTreeType> |
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class LeafTreeIterator : public TreeIteratorBase<TTreeType> |
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{ |
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public: |
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/** Typedefs*/ |
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typedef TreeIteratorBase<TTreeType> Superclass; |
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TDA |
typedef TTreeType TreeType; |
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TDA |
typedef typename TreeType::ValueType ValueType; |
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TDA |
typedef TreeNode<ValueType> TreeNodeType; |
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/** Constructor */ |
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LeafTreeIterator( const TreeType* tree ); |
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/** Constructor */ |
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LeafTreeIterator( TreeType* tree ); |
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/** Destructor */ |
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virtual ~LeafTreeIterator(); |
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/** Return the type of iterator */ |
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int GetType() const; |
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/** Clone function */ |
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TreeIteratorBase<TTreeType>* Clone(); |
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protected: |
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/** Return the next value */ |
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const ValueType& Next(); |
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/** Return true if the next value exists */ |
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bool HasNext() const; |
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private: |
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/** Find the next node */ |
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const TreeNodeType* FindNextNode() const; |
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}; |
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/** Constructor */ |
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template <class TTreeType> |
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LeafTreeIterator<TTreeType>::LeafTreeIterator( const TTreeType* tree ) |
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IND |
**:TreeIteratorBase<TTreeType>(tree,NULL) |
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{ |
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LEN |
this->m_Begin = const_cast<TreeNodeType* >(this->FindNextNode()); // Position the iterator to the first leaf; |
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} |
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/** Constructor */ |
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template <class TTreeType> |
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LeafTreeIterator<TTreeType>::LeafTreeIterator( TTreeType* tree ) |
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**:TreeIteratorBase<TTreeType>(tree,NULL) |
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{ |
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this->m_Begin = const_cast<TreeNodeType* >(this->FindNextNode()); // Position the iterator to the first leaf; |
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} |
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/** Destructor */ |
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template <class TTreeType> |
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LeafTreeIterator<TTreeType>::~LeafTreeIterator() |
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{ |
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} |
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/** Return the type of iterator */ |
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template <class TTreeType> |
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int LeafTreeIterator<TTreeType>::GetType() const |
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{ |
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return TreeIteratorBase<TTreeType>::LEAF; |
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} |
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/** Return true if the next value exists */ |
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template <class TTreeType> |
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bool LeafTreeIterator<TTreeType>::HasNext() const |
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{ |
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if(this->m_Position == NULL) |
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{ |
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return false; |
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} |
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if ( const_cast<TreeNodeType* >(FindNextNode()) != NULL ) |
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{ |
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return true; |
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} |
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return false; |
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} |
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/** Return the next node */ |
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template <class TTreeType> |
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const typename LeafTreeIterator<TTreeType>::ValueType& |
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LeafTreeIterator<TTreeType>::Next() |
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{ |
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this->m_Position = const_cast<TreeNodeType* >(FindNextNode()); |
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return this->m_Position->Get(); |
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} |
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/** Find the next node given the position */ |
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template <class TTreeType> |
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const typename LeafTreeIterator<TTreeType>::TreeNodeType* |
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LeafTreeIterator<TTreeType>::FindNextNode() const |
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{ |
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PreOrderTreeIterator<TTreeType> it(this->m_Tree,this->m_Position); |
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++it; // go next |
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if(it.IsAtEnd()) |
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{ |
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return NULL; |
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} |
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if(!it.HasChild()) |
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{ |
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return it.GetNode(); |
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} |
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while( !it.IsAtEnd() ) |
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{ |
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if(!it.HasChild()) |
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{ |
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return it.GetNode(); |
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} |
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++it; |
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} |
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return NULL; |
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} |
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/** Clone function */ |
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template <class TTreeType> |
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TreeIteratorBase<TTreeType>* LeafTreeIterator<TTreeType>::Clone() |
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{ |
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LeafTreeIterator<TTreeType>* clone = new LeafTreeIterator<TTreeType>( this->m_Tree ); |
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*clone = *this; |
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return clone; |
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} |
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} // end namespace itk |
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#endif |
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