qgsogrutils.h

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/***************************************************************************
                             qgsogrutils.h
                             -------------
    begin                : February 2016
    copyright            : (C) 2016 Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSOGRUTILS_H
#define QGSOGRUTILS_H

#define SIP_NO_FILE

#include "qgis_core.h"
#include "qgsfeature.h"

#include <ogr_api.h>
#include <gdal.h>
#include <gdalwarper.h>
#include "cpl_conv.h"
#include "cpl_string.h"

namespace gdal
{

  struct OGRDataSourceDeleter
  {

    void CORE_EXPORT operator()( void *source );

  };

  struct OGRGeometryDeleter
  {

    void CORE_EXPORT operator()( void *geometry );

  };

  struct OGRFldDeleter
  {

    void CORE_EXPORT operator()( void *definition );

  };

  struct OGRFeatureDeleter
  {

    void CORE_EXPORT operator()( void *feature );

  };

  struct GDALDatasetCloser
  {

    void CORE_EXPORT operator()( void *dataset );

  };

  struct GDALWarpOptionsDeleter
  {

    void CORE_EXPORT operator()( GDALWarpOptions *options );

  };

  using ogr_datasource_unique_ptr = std::unique_ptr< void, OGRDataSourceDeleter>;

  using ogr_geometry_unique_ptr = std::unique_ptr< void, OGRGeometryDeleter>;

  using ogr_field_def_unique_ptr = std::unique_ptr< void, OGRFldDeleter >;

  using ogr_feature_unique_ptr = std::unique_ptr< void, OGRFeatureDeleter >;

  using dataset_unique_ptr = std::unique_ptr< void, GDALDatasetCloser >;

  void CORE_EXPORT fast_delete_and_close( dataset_unique_ptr &dataset, GDALDriverH driver, const QString &path );

  using warp_options_unique_ptr = std::unique_ptr< GDALWarpOptions, GDALWarpOptionsDeleter >;
}

class CORE_EXPORT QgsOgrUtils
{
  public:

    static QgsFeature readOgrFeature( OGRFeatureH ogrFet, const QgsFields &fields, QTextCodec *encoding );

    static QgsFields readOgrFields( OGRFeatureH ogrFet, QTextCodec *encoding );

    static QVariant getOgrFeatureAttribute( OGRFeatureH ogrFet, const QgsFields &fields, int attIndex, QTextCodec *encoding, bool *ok = nullptr );

    static bool readOgrFeatureAttributes( OGRFeatureH ogrFet, const QgsFields &fields, QgsFeature &feature, QTextCodec *encoding );

    static bool readOgrFeatureGeometry( OGRFeatureH ogrFet, QgsFeature &feature );

    static QgsGeometry ogrGeometryToQgsGeometry( OGRGeometryH geom );

    static QgsFeatureList stringToFeatureList( const QString &string, const QgsFields &fields, QTextCodec *encoding );

    static QgsFields stringToFields( const QString &string, QTextCodec *encoding );
};

#endif // QGSOGRUTILS_H