Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  GDAL
       4             :  * Purpose:  "select" step of "vector pipeline"
       5             :  * Author:   Even Rouault <even dot rouault at spatialys.com>
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 2024, Even Rouault <even dot rouault at spatialys.com>
       9             :  *
      10             :  * SPDX-License-Identifier: MIT
      11             :  ****************************************************************************/
      12             : 
      13             : #ifndef GDALALG_VECTOR_SELECT_INCLUDED
      14             : #define GDALALG_VECTOR_SELECT_INCLUDED
      15             : 
      16             : #include "gdalalg_vector_pipeline.h"
      17             : 
      18             : //! @cond Doxygen_Suppress
      19             : 
      20             : /************************************************************************/
      21             : /*                    GDALVectorSelectAlgorithm                         */
      22             : /************************************************************************/
      23             : 
      24             : class GDALVectorSelectAlgorithm /* non final */
      25             :     : public GDALVectorPipelineStepAlgorithm
      26             : {
      27             :   public:
      28             :     static constexpr const char *NAME = "select";
      29             :     static constexpr const char *DESCRIPTION =
      30             :         "Select a subset of fields from a vector dataset.";
      31             :     static constexpr const char *HELP_URL = "/programs/gdal_vector_select.html";
      32             : 
      33         314 :     static std::vector<std::string> GetAliases()
      34             :     {
      35         314 :         return {};
      36             :     }
      37             : 
      38             :     explicit GDALVectorSelectAlgorithm(bool standaloneStep = false);
      39             : 
      40             :   private:
      41             :     bool RunStep(GDALProgressFunc pfnProgress, void *pProgressData) override;
      42             : 
      43             :     std::string m_activeLayer{};
      44             :     std::vector<std::string> m_fields{};
      45             :     bool m_ignoreMissingFields = false;
      46             :     bool m_exclude = false;
      47             : };
      48             : 
      49             : /************************************************************************/
      50             : /*                 GDALVectorSelectAlgorithmStandalone                  */
      51             : /************************************************************************/
      52             : 
      53             : class GDALVectorSelectAlgorithmStandalone final
      54             :     : public GDALVectorSelectAlgorithm
      55             : {
      56             :   public:
      57          10 :     GDALVectorSelectAlgorithmStandalone()
      58          10 :         : GDALVectorSelectAlgorithm(/* standaloneStep = */ true)
      59             :     {
      60          10 :     }
      61             : };
      62             : 
      63             : //! @endcond
      64             : 
      65             : #endif /* GDALALG_VECTOR_SELECT_INCLUDED */