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//===-- examples/CSVFiles/main.cpp --------------------------------*- C++ -*-===//
//
// The RoSA Framework -- Example CSVFiles
//
//===----------------------------------------------------------------------===//
///
/// \file examples/CSVFiles/main.cpp
///
/// \author Edwin Willegger (edwin.willegger@tuwien.ac.at)
///
/// \date 2019
///
/// \brief This example shows how you could use the CSVIterator class to
/// get data into RoSA from a CSV-file.
//===----------------------------------------------------------------------===//
// To compile with dumping record layout:
// $ clang++ -o variadic-tuple -Xclang -fdump-record-layouts variadic-tuple.cpp
// -Wall -g -std=c++11
#include <cstdint>
#include <cstddef>
#include <iostream>
#include <istream>
#include <sstream>
#include <fstream>
#include <ostream>
#include <string>
#include <vector>
#include <typeinfo>
#include <map>
#include <algorithm>
#include <tuple>
#include <type_traits>
#include <unistd.h>
#include "rosa/support/csv/CSVReader.hpp"
#include "rosa/support/csv/CSVWriter.hpp"
const std::string AppName = "test-csvfiles";
//the example will be executed in the bin directory, but the data files are located in another the examples folder
const std::string Path = "../examples/CSVFiles/";
void testtupleCSVReader(){
//different streams to get the csv data out of the files
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data("HR-New.csv");
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data_2("HR-New.csv");
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data_3("HR-New.csv");
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data_4("HR-New.csv");
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data_5("HR-New.csv");
//file contains header and valid data entries, delimter = ','
std::ifstream file_header_data_6("HR-New.csv");
//file contains no header an valid data entries, delimter = ','
std::ifstream file2("HR.csv");
//file contains header and valid data entries, delimter = ';'
std::ifstream file3("HR-New-Semicolon.csv");
rosa::csv::CSVIterator<int, std::string, std::string, int, int> it(file_header_data);
it.setDelimeter(',');
it++;
it++;
//if you iterate over the end of file, the last values
//of the file will remain in the data structure but no
//error occurs.
it++;
it++;
//-------------------------------------------------------------------
// a possiblity to get the data out of the iterator
std::tuple<int, std::string, std::string, int, int> value = *it;
std::cout << "Values are: " << std::get<0>(value) << " "
<< std::get<1>(value) << " ,are you now happy?" << std::endl;
//--------------------------------------------------------------------
//testing differnet parameters to the constructor
//uncomment to see that it is not possible to iterate over an vector in the tuple.
//rosa::csv::CSVIterator<double, std::vector<int>> it2(file, 1);
//try to skip a valid number of lines after the header
rosa::csv::CSVIterator<double, float, int, int, float> it2_0(file_header_data_2, 1);
//try to skip a valid number of lines after the header, but you assume that the file has no header
//uncomment this line to crash the programm
//rosa::csv::CSVIterator<double, float, int, int, float> it2_1(file_header_data_3, 0, rosa::csv::HeaderInformation::HasNoHeader);
//try to skip a valid number of lines after the header, but you assume that the file has no header
//uncomment this line to crash the program
// rosa::csv::CSVIterator<double, float, int, int, float> it2_2(file_header_data_4, 1, rosa::csv::HeaderInformation::HasNoHeader);
//try to skip a valid number of lines of a file without header
rosa::csv::CSVIterator<double, float, int, int, float> it2_3(file2, 1, rosa::csv::HeaderInformation::HasNoHeader);
//try to skip a valid number of lines after the header, but with different delimeter
rosa::csv::CSVIterator<double, float, int, int, float> it2_4(file3, 2,rosa::csv::HeaderInformation::HasHeader, ';');
// if you skip more lines than valid, you generate an infinte loop
//rosa::csv::CSVIterator<double, float, int, int, float> it3(file_header_data_5, 500);
//if you don't need data from all columns just select the number of columns you
//need. You get the data back from the first column (index 0) to the fourth column
//all values from the fifth column are ignored.
rosa::csv::CSVIterator<double, float, int, float> it4(file_header_data_6);
}
void testtupleCSVWriter(){
std::ofstream file_header_out("csvwriter_noheader.csv");
rosa::csv::CSVTupleWriter<int, float, std::string> wri(file_header_out);
std::tuple<int, float, std::string> values(5, 8.3, "hallo");
std::tuple<int, float, std::string> values2(3, 8.3, "end");
std::vector<std::string> header;
header.push_back("first column");
header.push_back("second column");
header.push_back("third column");
wri.writeHeader(header);
wri.write(values);
wri.write(values);
wri.write(values);
wri << values;
wri << values2;
}
int main(void) {
std::cout << "This is a short example to show you how you could use the CSVIterator class." << std::endl;
std::cout << "There are also some limitations explained in the source code of the example." << std::endl;
std::cout << "Testing CSVWriter CSVTupleItrator implementation: " << std::endl;
testtupleCSVWriter();
std::cout << "Testing CSVReader CSVTupleIterator implementation: " << std::endl;
testtupleCSVReader();
std::cout << "All tests finished sucessfully" << std::endl;
return 0;
}

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