/*=========================================================================
 *
 *  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 itkImageSourceCommon_h
#define itkImageSourceCommon_h

#include "ITKCommonExport.h"
#include "itkImageRegionSplitterBase.h"
#include "itkSingletonMacro.h"

namespace itk
{

struct ImageSourceCommonGlobals;

/** \class ImageSourceCommon
 * \brief Secondary base class of ImageSource common between templates
 *
 * This class provides common non-templated code which can be compiled
 * and used by all templated versions of ImageSource.
 *
 * This class must be inherited privately, and light-weight adapting
 * of methods is required for virtual methods or non-private methods
 * for the ImageSource interface.
 *
 * \ingroup ITKCommon
 */
struct ITKCommon_EXPORT ImageSourceCommon
{
  /**
   * Provide access to a common static object for image region splitting
   */
  static const ImageRegionSplitterBase *
  GetGlobalDefaultSplitter();

private:
  itkGetGlobalDeclarationMacro(ImageSourceCommonGlobals, PimplGlobals);
  static ImageSourceCommonGlobals * m_PimplGlobals;
};

} // end namespace itk

#endif
