109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/*------------------------------------------------------------------------------*
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* Architecture & Implementation of DBMS *
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*------------------------------------------------------------------------------*
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* Copyright 2022 Databases and Information Systems Group TU Dortmund *
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* Visit us at *
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* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
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* OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Authors: *
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* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
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* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
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* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
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*------------------------------------------------------------------------------*
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*/
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#pragma once
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#include "execution_callback.h"
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#include <cstddef>
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#include <cstdint>
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#include <ostream>
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#include <table/schema.h>
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#include <table/tuple.h>
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#include <util/text_table.h>
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#include <vector>
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namespace beedb::io
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{
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/**
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* Formats the result of a query, given by schema and set of tuples.
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*/
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class ResultOutputFormatter final : public ExecutionCallback
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{
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friend std::ostream &operator<<(std::ostream &stream, const ResultOutputFormatter &result_output_formatter);
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public:
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ResultOutputFormatter() = default;
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~ResultOutputFormatter() override = default;
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static ResultOutputFormatter from_serialized_data(const std::size_t count_tuples, const std::byte *data);
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void on_schema(const table::Schema &schema) override
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{
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header(schema);
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}
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void on_tuple(const table::Tuple &tuple) override
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{
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push_back(tuple);
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}
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void on_plan(const std::unique_ptr<plan::logical::NodeInterface> &) override
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{
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}
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/**
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* Set the header for the output.
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*
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* @param schema Schema for the header.
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*/
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void header(const table::Schema &schema);
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/**
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* Add a set of tuples to the result.
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* @param tuples Set of tuples.
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*/
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void push_back(const std::vector<table::Tuple> &tuples);
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/**
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* Add a single tuple to the result.
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* @param tuple
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*/
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void push_back(const table::Tuple &tuple);
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/**
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* Clear the formatter.
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*/
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inline void clear()
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{
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_table.clear();
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}
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/**
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* @return True, when no tuple as added.
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*/
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inline bool empty() const
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{
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return _table.empty();
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}
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/**
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* @return Number of added tuples.
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*/
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inline std::size_t count() const
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{
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return _count_tuples;
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}
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private:
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util::TextTable _table;
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std::size_t _count_tuples = 0u;
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};
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} // namespace beedb::io
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