.. _program_listing_file__tmp_ws_src_warehouse_ros_sqlite_include_warehouse_ros_sqlite_metadata.hpp:

Program Listing for File metadata.hpp
=====================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_warehouse_ros_sqlite_include_warehouse_ros_sqlite_metadata.hpp>` (``/tmp/ws/src/warehouse_ros_sqlite/include/warehouse_ros_sqlite/metadata.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2020 Bjarne von Horn
   //
   // Redistribution and use in source and binary forms, with or without
   // modification, are permitted provided that the following conditions are met:
   //
   //    * Redistributions of source code must retain the above copyright
   //      notice, this list of conditions and the following disclaimer.
   //
   //    * Redistributions in binary form must reproduce the above copyright
   //      notice, this list of conditions and the following disclaimer in the
   //      documentation and/or other materials provided with the distribution.
   //
   //    * Neither the name of the copyright holder nor the names of its
   //      contributors may be used to endorse or promote products derived from
   //      this software without specific prior written permission.
   //
   // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   // POSSIBILITY OF SUCH DAMAGE.
   
   // SPDX-License-Identifier: BSD-3-Clause
   
   #ifndef WAREHOUSE_ROS_SQLITE__METADATA_HPP_
   #define WAREHOUSE_ROS_SQLITE__METADATA_HPP_
   
   #include <warehouse_ros_sqlite/utils.hpp>
   #include <warehouse_ros_sqlite/warehouse_ros_sqlite_export.hpp>
   
   #include <warehouse_ros/metadata.h>
   #include <boost/variant.hpp>
   
   #include <map>
   #include <set>
   #include <string>
   
   extern "C" {
   struct sqlite3_stmt;
   struct sqlite3;
   }
   
   namespace warehouse_ros_sqlite
   {
   class WAREHOUSE_ROS_SQLITE_EXPORT Metadata : public warehouse_ros::Metadata
   {
   public:
     using Variant = boost::variant<NullValue, std::string, double, int>;
     void append(const std::string & name, const std::string & val) override;
     void append(const std::string & name, const double val) override;
     void append(const std::string & name, const int val) override;
     void append(const std::string & name, const bool val) override;
     std::string lookupString(const std::string & name) const override;
     double lookupDouble(const std::string & name) const override;
     int lookupInt(const std::string & name) const override;
     bool lookupBool(const std::string & name) const override;
     bool lookupField(const std::string & name) const override;
     std::set<std::string> lookupFieldNames() const override;
     void append(const std::string & name, sqlite3_stmt * stmt, int col);
     const auto & data() const
     {
       return data_;
     }
     void ensureColumns(sqlite3 * db, const std::string & unescaped_table_name) const;
   
   private:
     // ordered map for reproducible iterating
     std::map<std::string, Variant> data_;
   
     template<typename R>
     R doLookup(const std::string & name) const;
   };
   
   }  // namespace warehouse_ros_sqlite
   
   #endif  // WAREHOUSE_ROS_SQLITE__METADATA_HPP_