| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| |
| #ifndef IMPALA_UTIL_TABLE_PRINTER_H |
| #define IMPALA_UTIL_TABLE_PRINTER_H |
| |
| #include <boost/uuid/uuid.hpp> |
| |
| #include "gen-cpp/Types_types.h" // for TUniqueId |
| |
| namespace impala { |
| |
| /// Utility class to pretty print tables. Rows can be added and at the end |
| /// printed with fixed with spacing. |
| class TablePrinter { |
| public: |
| TablePrinter(); |
| |
| /// Add a column to the table. All calls to AddColumn() must come before any calls to |
| /// AddRow(). |
| void AddColumn(const std::string& label, bool left_align); |
| |
| /// Sets the max per column output width (otherwise, columns will be as wide as the |
| /// largest value). Values longer than this will be cut off. |
| void set_max_output_width(int width); |
| |
| /// Add a row to the table. This must have the same width as labels. |
| void AddRow(const std::vector<std::string>& row); |
| |
| /// Print to a table with prefix coming before the output. |
| std::string ToString(const std::string& prefix = "") const; |
| |
| private: |
| std::vector<std::string> labels_; |
| /// For each column, true if the value should be left aligned, right aligned otherwise. |
| std::vector<bool> left_align_; |
| |
| /// -1 to indicate unlimited. |
| int max_output_width_; |
| |
| std::vector<std::vector<std::string>> rows_; |
| std::vector<int> max_col_widths_; |
| |
| /// Helper function to print one row to ss. |
| void PrintRow(std::stringstream* ss, const std::vector<std::string>& row, |
| const std::vector<int>& widths) const; |
| }; |
| |
| } |
| |
| #endif |