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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkChildTreeIterator_h
#define itkChildTreeIterator_h
#include "itkTreeIteratorBase.h"
namespace itk
{
template< typename TTreeType >
class ITK_TEMPLATE_EXPORT ChildTreeIterator:public TreeIteratorBase< TTreeType >
{
public:
/** Typedefs */
typedef ChildTreeIterator Self;
typedef TreeIteratorBase< TTreeType > Superclass;
typedef TTreeType TreeType;
typedef typename TTreeType::ValueType ValueType;
typedef typename Superclass::TreeNodeType TreeNodeType;
typedef typename TreeNodeType::ChildIdentifier ChildIdentifier;
typedef typename Superclass::NodeType NodeType;
/** Constructor */
ChildTreeIterator(TreeType *tree, const TreeNodeType *start = ITK_NULLPTR);
/** Constructor */
ChildTreeIterator(const TreeIteratorBase< TTreeType > & iterator);
/** Get the type of the iterator */
NodeType GetType() const;
/** Go to a specific child node */
virtual bool GoToChild(ChildIdentifier number = 0);
/** Go to a parent node */
virtual bool GoToParent();
/** Clone function */
TreeIteratorBase< TTreeType > * Clone();
/** operator = */
Self & operator=(Superclass & iterator)
{
if(this != &iterator)
{
Superclass::operator=(iterator);
ChildTreeIterator< TTreeType > & it =
static_cast< ChildTreeIterator< TTreeType > & >( iterator );
m_ListPosition = it.m_ListPosition;
m_ParentNode = it.m_ParentNode;
}
return *this;
}
protected:
/** Get the next value */
const ValueType & Next();
/** Return true if the next value exists */
bool HasNext() const;
private:
mutable ChildIdentifier m_ListPosition;
TreeNodeType * m_ParentNode;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkChildTreeIterator.hxx"
#endif
#endif
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