1 /**

     2  * Relational pipes

     3  * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 #pragma once

    19 

    20 #include <memory>

    21 #include <string>

    22 #include <vector>

    23 #include <iostream>

    24 #include <sstream>

    25 #include <locale>

    26 #include <codecvt>

    27 

    28 #include <relpipe/reader/typedefs.h>

    29 #include <relpipe/reader/TypeId.h>

    30 #include <relpipe/reader/handlers/RelationalReaderStringHandler.h>

    31 #include <relpipe/reader/handlers/AttributeMetadata.h>

    32 

    33 namespace relpipe {

    34 namespace out {

    35 namespace csv {

    36 

    37 using namespace relpipe;

    38 using namespace relpipe::reader;

    39 using namespace relpipe::reader::handlers;

    40 

    41 class CSVHandler : public RelationalReaderStringHadler {

    42 private:

    43 	std::ostream& output;

    44 	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.

    45 public:

    46 

    47 	CSVHandler(std::ostream& output) : output(output) {

    48 	}

    49 

    50 	void startRelation(string_t name, std::vector<AttributeMetadata> attributes) override {

    51 

    52 	}

    53 

    54 	void attribute(const string_t& value) override {

    55 		output << convertor.to_bytes(value).c_str();

    56 		output.put(0);

    57 	}

    58 

    59 	void endOfPipe() {

    60 		output.flush();

    61 	}

    62 

    63 };

    64 

    65 }

    66 }

    67 }