itkCellInterfaceVisitor.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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 itkCellInterfaceVisitor_h
#define itkCellInterfaceVisitor_h
 
#include "itkLightObject.h"
#include "itkObjectFactory.h"
#include "itkCommonEnums.h"
 
namespace itk
{
// Forward reference of CellInterface because of circular #include dependencies
template <typename TPixelType, typename TCellTraits>
class ITK_TEMPLATE_EXPORT CellInterface;

template <typename TPixelType, typename TCellTraits>
class ITK_TEMPLATE_EXPORT CellInterfaceVisitor : public LightObject
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(CellInterfaceVisitor);

  using Self = CellInterfaceVisitor;
  using Superclass = LightObject;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
  using CellIdentifier = typename TCellTraits::CellIdentifier;

  itkOverrideGetNameOfClassMacro(CellInterfaceVisitor);

  virtual void
  VisitFromCell(CellIdentifier cellId, CellInterface<TPixelType, TCellTraits> *) = 0;

  virtual CellGeometryEnum
  GetCellTopologyId() = 0;
 
protected:
  CellInterfaceVisitor() = default;
  ~CellInterfaceVisitor() override = default;
};

template <typename TPixelType, typename TCellTraits, typename CellTopology, typename UserVisitor>
class CellInterfaceVisitorImplementation
  : public CellInterfaceVisitor<TPixelType, TCellTraits>
  , public UserVisitor
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(CellInterfaceVisitorImplementation);

  using Self = CellInterfaceVisitorImplementation;
  using Pointer = SmartPointer<Self>;
  using CellIdentifier = typename TCellTraits::CellIdentifier;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(CellInterfaceVisitorImplementation);

  CellGeometryEnum
  GetCellTopologyId() override
  {
    return CellTopology::GetTopologyId();
  }

  void
  VisitFromCell(CellIdentifier cellId, CellInterface<TPixelType, TCellTraits> * c) override
  {
    this->UserVisitor::Visit(cellId, (CellTopology *)c);
  }
 
protected:
  CellInterfaceVisitorImplementation() = default;
  ~CellInterfaceVisitorImplementation() override = default;
};
} // end namespace itk
 
#endif