1 #pragma once

     2 

     3 #include <string>

     4 #include <sstream>

     5 #include <iostream>

     6 #include <vector>

     7 #include <locale>

     8 #include <codecvt>

     9 

    10 #include "../include/DataTypeWriter.h"

    11 #include "format.h"

    12 

    13 namespace relpipe {

    14 namespace writer {

    15 

    16 /**

    17  * The prototype does not recognize any encoding,

    18  * it just works with c++ strings in encoding default to given platform. 

    19  * In the real implementation of relational pipes, there will be DataTypes for particular encodings.

    20  */

    21 class StringDataTypeWriter : public DataTypeWriter<string_t> {

    22 private:

    23 	IntegerDataTypeWriter integerType;

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

    25 public:

    26 

    27 	StringDataTypeWriter() : DataTypeWriter<string_t>(DATA_TYPE_ID_STRING, DATA_TYPE_CODE_STRING) {

    28 	}

    29 

    30 	void writeValue(std::ostream &output, const string_t &value) override {

    31 		std::string s = convertor.to_bytes(value);

    32 		integerType.writeValue(output, s.length());

    33 		output << s.c_str();

    34 	}

    35 

    36 	wstring toValue(const string_t &stringValue) override {

    37 		return stringValue;

    38 	}

    39 

    40 };

    41 

    42 }

    43 }