ArgumentsCommand.h
author František Kučera <franta-hg@frantovo.cz>
Thu, 29 Nov 2018 22:30:11 +0100
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license: GNU GPLv3+
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/**
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 * Relational pipes
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 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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 */
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#pragma once
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#include <cstdlib>
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#include <iostream>
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#include <string>
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#include <vector>
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#include <algorithm>
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#include <relpipe/writer/typedefs.h>
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#include <relpipe/writer/AttributeMetadata.h>
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#include "Command.h"
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namespace relpipe {
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namespace in {
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namespace cli {
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class ArgumentsCommand : public Command {
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public:
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	void process(std::istream& input, std::ostream& output, const relpipe::writer::string_t& command, const std::vector<relpipe::writer::string_t>& arguments) override {
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		using namespace relpipe::writer;
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		size_t i = 0;
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		string_t relationName = arguments[i++];
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		integer_t attributeCount = std::stoul(arguments[i++]); // TODO: use integer data type's method?
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		boolean_t writeHeader = true; // TODO: add option for header omitting
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		// TODO: check argument count
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		std::shared_ptr<RelationalWriter> writer(Factory::create(output));
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		std::vector<AttributeMetadata> attributes(attributeCount);
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		for (size_t j = 0; j < attributeCount; j++) {
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			string_t attributeName = arguments[i++];
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			TypeId attributeType = writer->toTypeId(arguments[i++]);
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			attributes[j] = {attributeName, attributeType};
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		}
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		writer->startRelation(relationName, attributes, writeHeader);
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		for (; i < arguments.size(); i++) {
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			writer->writeAttribute(arguments[i]);
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		}
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	}
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};
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}
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}
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}