gdalalg_vector_select.h

/******************************************************************************
 *
 * Project:  GDAL
 * Purpose:  "select" step of "vector pipeline"
 * Author:   Even Rouault <even dot rouault at spatialys.com>
 *
 ******************************************************************************
 * Copyright (c) 2024, Even Rouault <even dot rouault at spatialys.com>
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/
 
#ifndef GDALALG_VECTOR_SELECT_INCLUDED
#define GDALALG_VECTOR_SELECT_INCLUDED
 
#include "gdalalg_vector_pipeline.h"

 
/************************************************************************/
/*                    GDALVectorSelectAlgorithm                         */
/************************************************************************/
 
class GDALVectorSelectAlgorithm /* non final */
    : public GDALVectorPipelineStepAlgorithm
{
  public:
    static constexpr const char *NAME = "select";
    static constexpr const char *DESCRIPTION =
        "Select a subset of fields from a vector dataset.";
    static constexpr const char *HELP_URL = "/programs/gdal_vector_select.html";
 
    explicit GDALVectorSelectAlgorithm(bool standaloneStep = false);
 
  private:
    bool RunStep(GDALPipelineStepRunContext &ctxt) override;
 
    std::string m_activeLayer{};
    std::vector<std::string> m_fields{};
    bool m_ignoreMissingFields = false;
    bool m_exclude = false;
};
 
/************************************************************************/
/*                 GDALVectorSelectAlgorithmStandalone                  */
/************************************************************************/
 
class GDALVectorSelectAlgorithmStandalone final
    : public GDALVectorSelectAlgorithm
{
  public:
    GDALVectorSelectAlgorithmStandalone()
        : GDALVectorSelectAlgorithm(/* standaloneStep = */ true)
    {
    }
 
    ~GDALVectorSelectAlgorithmStandalone() override;
};

 
#endif /* GDALALG_VECTOR_SELECT_INCLUDED */