Expander.h

#pragma once

#if defined(Expander_RECURSES)
#error Recursive header files inclusion detected in Expander.h
#else // defined(Expander_RECURSES)

#define Expander_RECURSES

#if !defined Expander_h

#define Expander_h

// Inclusions
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/base/ConstAlias.h"
#include "DGtal/kernel/sets/DigitalSetSelector.h"
#include "DGtal/kernel/sets/DigitalSetDomain.h"
#include "DGtal/topology/DomainAdjacency.h"
#include "DGtal/topology/Object.h"

namespace DGtal
{

  // template class Expander
  template <typename TObject>
  class Expander
  {
    // ----------------------- Associated types ------------------------------
  public:
    typedef TObject Object;
    typedef typename Object::Size Size;
    typedef typename Object::Point Point;
    typedef typename Object::Domain Domain;
    typedef typename Object::DigitalSet DigitalSet;
    typedef typename Object::ForegroundAdjacency ForegroundAdjacency;
    typedef typename Domain::Space Space;
    typedef typename DigitalSet::ConstIterator ConstIterator;
    typedef DigitalSetDomain<DigitalSet> ObjectDomain;
    typedef DigitalSetDomain<DigitalSet> CoreDomain;
    typedef DomainAdjacency< ObjectDomain, ForegroundAdjacency> ObjectAdjacency;
    typedef typename CoreDomain::Predicate InCoreDomainPredicate; 
    typedef functors::NotPointPredicate< InCoreDomainPredicate > NotInCoreDomainPredicate;

    // ----------------------- Standard services ------------------------------
  public:

    ~Expander();

    Expander( ConstAlias<Object> object, const Point & p );

    template <typename PointInputIterator>
    Expander( ConstAlias<Object> object,
        PointInputIterator b, PointInputIterator e );


    // ----------------------- Expansion services ------------------------------
  public:

    bool finished() const;

    Size distance() const;

    bool nextLayer();

    const DigitalSet & core() const;

    const DigitalSet & layer() const;

    ConstIterator begin() const;

    ConstIterator end() const;

    // ----------------------- Interface --------------------------------------
  public:

    void selfDisplay ( std::ostream & out ) const;

    bool isValid() const;

    // ------------------------- Protected Datas ------------------------------
  private:
    // ------------------------- Private Datas --------------------------------
  private:

    const Domain & myEmbeddingDomain;

    const Object & myObject;

    ObjectDomain myObjectDomain;

    ObjectAdjacency myObjectAdjacency;

    DigitalSet myCore;

    DigitalSet myLayer;

    Size myDistance;

    bool myFinished;

    NotInCoreDomainPredicate myNotInCorePred;

    // ------------------------- Hidden services ------------------------------
  protected:

    Expander();

    void computeNextLayer( const DigitalSet & src );

    void endLayer();

  private:

    Expander ( const Expander & other );

    Expander & operator= ( const Expander & other );

    // ------------------------- Internals ------------------------------------
  private:

  }; // end of class Expander


  template <typename T>
  std::ostream&
  operator<< ( std::ostream & out, const Expander<T> & object );

} // namespace DGtal


// Includes inline functions.
#include "DGtal/graph/Expander.ih"

//                                                                           //

#endif // !defined Expander_h

#undef Expander_RECURSES
#endif // else defined(Expander_RECURSES)