ManualColumnData.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/

 
 
#ifndef COLUMNAR_TEST_FIXTURES_MANUAL_COLUMN_DATA_H
#define COLUMNAR_TEST_FIXTURES_MANUAL_COLUMN_DATA_H
 
#include <boost/core/demangle.hpp>
 
#include <any>
#include <memory>
#include <span>
#include <stdexcept>
#include <string>
#include <vector>
 
namespace columnar
{
  namespace TestUtils
  {
 
    class ManualColumnData final
    {
    public:

      ManualColumnData (std::vector<std::any>&& data);
 

      void configureType (const std::string& columnName, const std::type_info& type);

      [[nodiscard]] const std::type_info* type() const noexcept {
        return m_type; }

      template<typename T>
      [[nodiscard]] std::span<const T> getSpan (const std::string& name) const
      {
        if (m_type == nullptr)
          throw std::runtime_error ("column " + name + " not configured");
        if (*m_type != typeid(T))
          throw std::runtime_error ("column " + name + " has wrong type: " + boost::core::demangle(m_type->name()) + " != " + boost::core::demangle(typeid(T).name()));
        return std::span<const T> (static_cast<const T*> (m_column.get()), m_data.size());
      }

      [[nodiscard]] std::size_t columnSize () const noexcept {
        return m_data.size(); }

      [[nodiscard]] void* columnVoidData() noexcept {
        return m_column.get(); }
 
 

    private:

      std::vector<std::any> m_data;

      const std::type_info *m_type = nullptr;

      std::shared_ptr<void> m_column;
    };
  }
}
 
#endif