/*=========================================================================
 *
 *  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 itkAggregateLabelMapFilter_hxx
#define itkAggregateLabelMapFilter_hxx

#include "itkProgressReporter.h"

namespace itk
{
template <typename TImage>
void
AggregateLabelMapFilter<TImage>::GenerateData()
{
  // Allocate the output
  this->AllocateOutputs();

  ImageType * output = this->GetOutput();

  ProgressReporter progress(this, 0, output->GetNumberOfLabelObjects());

  typename TImage::Iterator it(output);
  if (!it.IsAtEnd())
  {
    LabelObjectType * mainLo = it.GetLabelObject();
    progress.CompletedPixel();
    ++it;
    while (!it.IsAtEnd())
    {
      LabelObjectType *                           lo = it.GetLabelObject();
      typename LabelObjectType::ConstLineIterator lit(lo);
      while (!lit.IsAtEnd())
      {
        mainLo->AddLine(lit.GetLine());
        ++lit;
      }
      // be sure to have the lines well organized
      mainLo->Optimize();

      progress.CompletedPixel();
      ++it;
      // must increment the iterator before removing the object to avoid
      // invalidating the iterator
      output->RemoveLabelObject(lo);
    }
  }
}

template <typename TImage>
void
AggregateLabelMapFilter<TImage>::PrintSelf(std::ostream & os, Indent indent) const
{
  this->Superclass::PrintSelf(os, indent);
}
} // end namespace itk
#endif
