Function garrow_project_node_options_new

c_glib/arrow-glib/compute.cpp:1448–1473

* garrow_project_node_options_new: * @expressions: (element-type GArrowExpression): * A list of #GArrowExpression to be executed. * @names: (nullable) (array length=n_names): * A list of output column names of @expressions. If @names is %NULL, * the string representations of @expressions will be used. * @n_names: The number of @names. * * Returns: A newly created #GArrowProjectNodeOp

 * Since: 11.0.0
 */
GArrowProjectNodeOptions *
garrow_project_node_options_new(GList *expressions, gchar **names, gsize n_names)
{
  std::vector<arrow::compute::Expression> arrow_expressions;
  std::vector<std::string> arrow_names;
  for (auto node = expressions; node; node = g_list_next(node)) {
    auto expression = GARROW_EXPRESSION(node->data);
    arrow_expressions.push_back(*garrow_expression_get_raw(expression));
  }
  for (gsize i = 0; i < n_names; ++i) {
    arrow_names.emplace_back(names[i]);
  }
  if (!arrow_names.empty()) {
    for (size_t i = arrow_names.size(); i < arrow_expressions.size(); ++i) {
      arrow_names.push_back(arrow_expressions[i].ToString());
    }
  }
  auto arrow_options =
    new arrow::acero::ProjectNodeOptions(arrow_expressions, arrow_names);
  auto options =
    g_object_new(GARROW_TYPE_PROJECT_NODE_OPTIONS, "options", arrow_options, NULL);
  auto priv = GARROW_PROJECT_NODE_OPTIONS_GET_PRIVATE(options);
  priv->expressions =
    g_list_copy_deep(expressions, reinterpret_cast<GCopyFunc>(g_object_ref), nullptr);
  return GARROW_PROJECT_NODE_OPTIONS(options);
}

/**
 * garrow_project_node_options_get_expressions: