otbOGRHelpers.h

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/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt for details.


     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __otbOGRHelpers_h
#define __otbOGRHelpers_h

#include <string>
#include <vector>
#include <cassert>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/range/size.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
#if ! defined(NDEBUG)
#include "cpl_string.h" // CSLCount
#endif

namespace otb
{
namespace ogr
{
struct StringListConverter
{

  template <class ContainerType>
  explicit StringListConverter(ContainerType const& strings)
    {
    BOOST_MPL_ASSERT((boost::is_same<typename ContainerType::value_type, std::string>));
    m_raw.reserve(boost::size(strings)+1);
    for (typename ContainerType::const_iterator b = boost::begin(strings), e = boost::end(strings); b != e; ++b)
      {
      m_raw.push_back(b->c_str());
      }
    m_raw.push_back(0);
    assert(CSLCount(const_cast <char**>(&m_raw[0])) == boost::size(strings));
    }
  char ** to_ogr() const
    {
    return m_raw.size() == 1
            ? NULL
            : const_cast <char**>(&m_raw[0]);
    }
private:
  std::vector<char const*> m_raw;
};

} // ogr namespace
} // end namespace otb

#endif // __otbOGRHelpers_h