itkLevelSetContainerBase.h

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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 __itkLevelSetContainerBase_h
#define __itkLevelSetContainerBase_h

#include <map>
#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkHeavisideStepFunctionBase.h"
#include "itkLevelSetDomainMapImageFilter.h"


namespace itk
{
template< class TIdentifier, class TLevelSet >
class LevelSetContainerBase : public Object
{
public:
  typedef LevelSetContainerBase      Self;
  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;
  typedef Object                     Superclass;

  itkTypeMacro ( LevelSetContainerBase, Object );

  typedef TLevelSet                               LevelSetType;
  typedef typename LevelSetType::Pointer          LevelSetPointer;
  typedef typename LevelSetType::InputType        InputIndexType;
  typedef typename LevelSetType::OutputType       OutputType;
  typedef typename LevelSetType::OutputRealType   OutputRealType;
  typedef typename LevelSetType::GradientType     GradientType;
  typedef typename LevelSetType::HessianType      HessianType;
  typedef typename LevelSetType::LevelSetDataType LevelSetDataType;

  typedef TIdentifier LevelSetIdentifierType;

  typedef std::map< LevelSetIdentifierType, LevelSetPointer > LevelSetContainerType;
  typedef typename LevelSetContainerType::const_iterator      LevelSetContainerConstIteratorType;
  typedef typename LevelSetContainerType::iterator            LevelSetContainerIteratorType;

  typedef HeavisideStepFunctionBase< OutputRealType, OutputRealType > HeavisideType;
  typedef typename HeavisideType::ConstPointer                        HeavisideConstPointer;

  itkStaticConstMacro ( Dimension, unsigned int, LevelSetType::Dimension );

  typedef std::list< LevelSetIdentifierType >           IdListType;
  typedef typename IdListType::iterator                 IdListIterator;
  typedef typename IdListType::const_iterator           IdListConstIterator;
  typedef Image< IdListType, Dimension >                IdListImageType;
  typedef Image< short, Dimension >                     CacheImageType;

  typedef LevelSetDomainMapImageFilter< IdListImageType, CacheImageType > DomainMapImageFilterType;

  typedef std::pair< LevelSetIdentifierType, LevelSetPointer > LevelSetPairType;

  typedef typename DomainMapImageFilterType::Pointer          DomainMapImageFilterPointer;
  typedef typename DomainMapImageFilterType::LevelSetDomain   LevelSetDomainType;

  typedef std::map< LevelSetIdentifierType, LevelSetDomainType >   DomainContainerType;
  typedef typename DomainContainerType::iterator                   DomainIteratorType;

  class Iterator;
  friend class Iterator;

  class ConstIterator
  {
  public:
    ConstIterator( ) {}
    ConstIterator( const LevelSetContainerConstIteratorType& it ) : m_Iterator( it ) {}
    ~ConstIterator() {}
    ConstIterator( const Iterator& it ) : m_Iterator( it.m_Iterator ) {}

    ConstIterator & operator * () { return *this; }
    ConstIterator * operator->()  { return this; }
    ConstIterator & operator++()
    {
      ++m_Iterator;
      return *this;
    }
    ConstIterator operator++(int)
    {
      ConstIterator tmp( *this );
      ++(*this);
      return tmp;
    }
    ConstIterator & operator--()
    {
      --m_Iterator;
      return *this;
    }
    ConstIterator operator--(int)
    {
      ConstIterator tmp( *this );
      --(*this);
      return tmp;
    }
    bool operator==(const Iterator& it) const
    {
      return ( m_Iterator == it.m_Iterator );
    }
    bool operator!=(const Iterator& it) const
    {
      return (m_Iterator != it.m_Iterator );
    }
    bool operator==(const ConstIterator& it) const
    {
      return ( m_Iterator == it.m_Iterator );
    }
    bool operator!=(const ConstIterator& it) const
    {
      return (m_Iterator != it.m_Iterator );
    }

    LevelSetIdentifierType GetIdentifier() const
    {
      return m_Iterator->first;
    }

    LevelSetType* GetLevelSet() const
    {
      return m_Iterator->second;
    }

  private:
    LevelSetContainerConstIteratorType m_Iterator;
    friend class Iterator;
    };

  class Iterator
    {
  public:
    Iterator( ) {}
    Iterator( const LevelSetContainerIteratorType& it ) : m_Iterator( it ) {}
    Iterator( const ConstIterator& it ) : m_Iterator( it.m_Iterator ) {}
    ~Iterator() {}

    Iterator & operator * () { return *this; }
    Iterator * operator->()  { return this; }
    Iterator & operator++()
    {
      ++m_Iterator;
      return *this;
    }
    Iterator operator++(int)
    {
      Iterator tmp( *this );
      ++(*this);
      return tmp;
    }
    Iterator & operator--()
    {
      --m_Iterator;
      return *this;
    }
    Iterator operator--(int)
    {
      Iterator tmp( *this );
      --(*this);
      return tmp;
    }
    bool operator==(const Iterator& it) const
    {
      return ( m_Iterator == it.m_Iterator );
    }
    bool operator!=(const Iterator& it) const
    {
      return (m_Iterator != it.m_Iterator );
    }
    bool operator==(const ConstIterator& it) const
    {
      return ( m_Iterator == it.m_Iterator );
    }
    bool operator!=(const ConstIterator& it) const
    {
      return (m_Iterator != it.m_Iterator );
    }

    LevelSetIdentifierType GetIdentifier() const
    {
      return m_Iterator->first;
    }

    LevelSetType* GetLevelSet() const
    {
      return m_Iterator->second;
    }

  private:
    LevelSetContainerIteratorType m_Iterator;
    friend class ConstIterator;
  };

  Iterator Begin();
  Iterator End();

  ConstIterator Begin() const;
  ConstIterator End() const;

  LevelSetIdentifierType Size() const;

  LevelSetPointer GetLevelSet( const LevelSetIdentifierType& iId ) const;

  bool AddLevelSet( const LevelSetIdentifierType& iId,
                    LevelSetType * iLevelSet,
                    const bool iForce = true );

  bool RemoveLevelSet( const LevelSetIdentifierType& iId );

  itkSetObjectMacro( Heaviside, HeavisideType );
  itkGetConstObjectMacro( Heaviside, HeavisideType );

  itkSetObjectMacro( DomainMapFilter, DomainMapImageFilterType );
  itkGetObjectMacro( DomainMapFilter, DomainMapImageFilterType );

  bool HasDomainMap() const;

protected:
  LevelSetContainerBase();

  ~LevelSetContainerBase();

  const LevelSetContainerType& GetContainer() const;
  void SetContainer( const LevelSetContainerType& iContainer );

private:
  LevelSetContainerBase( const Self & ); // purposely not implemented
  void operator = ( const Self & ); // purposely not implemented

  HeavisideConstPointer         m_Heaviside;
  DomainMapImageFilterPointer   m_DomainMapFilter;
  LevelSetContainerType         m_Container;
};
}

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLevelSetContainerBase.hxx"
#endif

#endif // __itkLevelSetContainerBase_h