otbClosePathFunctor.h

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/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 * 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 otbClosePathFunctor_h
#define otbClosePathFunctor_h
 
#include "otbMath.h"
 
namespace otb
{
 
template <class TInput, class TOutput>
class ClosePathFunctor
{
public:
  typedef typename TInput::VertexListType::ConstIterator VertexListConstIteratorType;
  typedef typename TInput::VertexListType::ConstPointer  VertexListConstPointerType;
  typedef TOutput                                        OutputPathType;
  typedef typename OutputPathType::Pointer               OutputPathPointerType;
 
  ClosePathFunctor()
  {
  }
  virtual ~ClosePathFunctor()
  {
  }
 
  inline OutputPathPointerType operator()(const TInput* input)
  {
    OutputPathPointerType newPath = OutputPathType::New();
    newPath->Initialize();
    typename TInput::VertexType lastVertex;
 
    if (input->GetVertexList()->Size() > 0)
    {
      // Initialization of lastVertex to GetVertexList
      lastVertex = input->GetVertexList()->Begin().Value();
 
      for (VertexListConstIteratorType vertexIt = input->GetVertexList()->Begin(); vertexIt != input->GetVertexList()->End(); ++vertexIt)
      {
        newPath->AddVertex(vertexIt.Value());
        lastVertex = vertexIt.Value();
      }
      if (lastVertex != input->GetVertexList()->Begin().Value())
      {
        newPath->AddVertex(input->GetVertexList()->Begin().Value());
      }
    }
 
    newPath->SetMetaDataDictionary(input->GetMetaDataDictionary());
    return newPath;
  }
};
}
 
#endif