Program Listing for File table_info_data.cpp

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/* * SPDX-FileCopyrightText: Copyright (c) 2021-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "morpheus/objects/table_info_data.hpp" // #include "morpheus/objects/dtype.hpp" #include <cudf/copying.hpp> #include <cudf/table/table_view.hpp> #include <cudf/types.hpp> #include <glog/logging.h> #include <algorithm> #include <iterator> #include <ostream> #include <stdexcept> #include <utility> // #include // for find, transform // #include // needed for pybind11::make_tuple // #include // for size_t // #include // for back_insert_iterator, back_inserter // #include // #include // #include // #include // #include // #include // IWYU pragma: no_include namespace morpheus { TableInfoData::TableInfoData(cudf::table_view view, std::vector<std::string> indices, std::vector<std::string> columns) : table_view(std::move(view)), index_names(std::move(indices)), column_names(std::move(columns)) {} TableInfoData TableInfoData::get_slice(std::vector<std::string> column_names) const { return this->get_slice(0, -1, std::move(column_names)); } TableInfoData TableInfoData::get_slice(cudf::size_type start, cudf::size_type stop, std::vector<std::string> column_names) const { CHECK_GE(start, 0) << "Start must be >= 0"; if (stop < 0) { stop = this->table_view.num_rows(); } CHECK_GT(stop, 0) << "Stop must be > 0"; CHECK_LE(stop, this->table_view.num_rows()) << "Stop must be less than the number of rows"; CHECK_LE(start, stop) << "Start must be less than stop"; if (column_names.empty()) { column_names = this->column_names; } // Start with our table view auto table_view_out = this->table_view; // If the columns are different, calculate the new slice if (column_names != this->column_names) { std::vector<cudf::size_type> col_indices; std::vector<std::string> new_column_names; // Append the indices column idx by default for (cudf::size_type i = 0; i < this->index_names.size(); ++i) { col_indices.push_back(i); } std::transform(column_names.begin(), column_names.end(), std::back_inserter(col_indices), [this, &new_column_names](const std::string& c) { auto found_col = std::find(this->column_names.begin(), this->column_names.end(), c); if (found_col == this->column_names.end()) { throw std::invalid_argument("Unknown column: " + c); } // Add the found column to the metadata new_column_names.push_back(c); return (found_col - this->column_names.begin() + this->index_names.size()); }); table_view_out = table_view_out.select(col_indices); } // If the start/stop is different, then perform the slice if (start != 0 || stop != this->table_view.num_rows()) { table_view_out = cudf::slice(table_view_out, {start, stop})[0]; } // Create a new TableInfoData return {table_view_out, this->index_names, column_names}; } } // namespace morpheus

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