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TatortTendencyParser.cpp
324 lines (207 loc) · 8.26 KB
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TatortTendencyParser.cpp
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#include "TatortTendencyParser.h"
#include "Logger.h"
#include "MyException.h"
#include <fstream>
#include <algorithm>
// ============================================================================================
// ========================= TatortTendencyParser ========================================
// ============================================================================================
TatortTendencyParser::TatortTendencyParser() : Parser() {
_userRatingsFilename = "u_r.data";
_episodeRatingsFilename = "e_r.data";
_detectiveRatingsFilename = "d_r.data";
}
TatortTendencyParser::~TatortTendencyParser() {
}
void TatortTendencyParser::init() {
}
void TatortTendencyParser::parseTestData(string inFilename, string delimiter, bool isHeaderPresent) {
_testData.clear();
parseFile(inFilename, delimiter, isHeaderPresent);
Logger::getInstance()->log("start parsing test data to predict ...", LOG_DEBUG);
vector<string> userIds = getColumn(0);
vector<string> itemIds = getColumn(2);
vector<string> detectiveIds = getColumn(4);
vector<string> ratings = getColumn(11);
for (int i = 0; i < _numOfDatasets; i++) {
vector<int> testTupel;
testTupel.push_back(stoi(userIds[i]));
testTupel.push_back(stoi(itemIds[i]));
testTupel.push_back(stoi(detectiveIds[i]));
_testData.push_back(testTupel);
_testRatings.push_back(stod(ratings[i]));
}
Logger::getInstance()->log("parsing test data done!", LOG_DEBUG);
}
void TatortTendencyParser::parseTrainData(string inFilename, string delimiter, bool isHeaderPresent) {
_userRatings.clear();
_episodeRatings.clear();
_detectiveRatings.clear();
parseFile(inFilename, delimiter, isHeaderPresent);
Logger::getInstance()->log("start parsing train data for predictor ...", LOG_DEBUG);
vector<string> userIdColumn = getColumn(0);
vector<string> episodeIdColumn = getColumn(2);
vector<string> detectiveIdColumn = getColumn(4);
vector<string> ratingColumn = getColumn(11);
int userId;
int episodeId;
int detectiveId;
double rating;
for (int i = 0; i < _numOfDatasets; i++) {
userId = stoi(userIdColumn[i]);
episodeId = stoi(episodeIdColumn[i]);
detectiveId = stoi(detectiveIdColumn[i]);
rating = stod(ratingColumn[i]);
// fill ratings per user
map<int, vector<pair<int, double> > >::iterator mapIt = _userRatings.find(userId);
if (mapIt == _userRatings.end()) {
vector<pair<int, double> > tmp;
tmp.push_back(pair<int, double>(episodeId, rating));
_userRatings.insert(pair < int, vector<pair<int, double> > >(userId, tmp));
}
else {
mapIt->second.push_back(pair<int, double>(episodeId, rating));
}
// fill ratings per episode
mapIt = _episodeRatings.find(episodeId);
if (mapIt == _episodeRatings.end()) {
vector<pair<int, double> > tmp;
tmp.push_back(pair<int, double>(userId, rating));
_episodeRatings.insert(pair < int, vector<pair<int, double> > >(episodeId, tmp));
}
else {
mapIt->second.push_back(pair<int, double>(userId, rating));
}
// fill ratings per detective
mapIt = _detectiveRatings.find(detectiveId);
if (mapIt == _detectiveRatings.end()) {
vector<pair<int, double> > tmp;
tmp.push_back(pair<int, double>(userId, rating));
_detectiveRatings.insert(pair < int, vector<pair<int, double> > >(detectiveId, tmp));
}
else {
mapIt->second.push_back(pair<int, double>(userId, rating));
}
// TODO: hier gehts weiter
}
Logger::getInstance()->log("parsing train data done!", LOG_DEBUG);
}
void TatortTendencyParser::writeDataToFile() {
Logger::getInstance()->log("writing map 'userRatings' to file ...", LOG_DEBUG);
writeMapToFile(&_userRatings, _userRatingsFilename);
Logger::getInstance()->log("writing map 'episodeRatings' to file ...", LOG_DEBUG);
writeMapToFile(&_episodeRatings, _episodeRatingsFilename);
Logger::getInstance()->log("writing map 'detectiveRatings' to file ...", LOG_DEBUG);
writeMapToFile(&_detectiveRatings, _detectiveRatingsFilename);
Logger::getInstance()->log("writing maps to file done!", LOG_DEBUG);
}
void TatortTendencyParser::writeMapToFile(map<int, vector< pair<int, double> > > *data, string filename) {
ofstream ofile(filename);
if (!ofile.is_open())
throw MyException("EXCEPTION: file '" + filename + "' could not be opened for writing");
// DATAFILE format:
// key
// numberOfEntries
// int;double
map<int, vector< pair<int, double> > >::iterator iter = data->begin();
while (iter != data->end()) {
ofile << iter->first << endl;
ofile << iter->second.size() << endl;
for (unsigned int i = 0; i < iter->second.size(); i++) {
ofile << iter->second[i].first << ";" << iter->second[i].second << endl;
}
iter++;
}
}
void TatortTendencyParser::readDataFromFile() {
_userRatings.clear();
_episodeRatings.clear();
_detectiveRatings.clear();
Logger::getInstance()->log("reading map 'userRatings' from file ...", LOG_DEBUG);
readMapFromFile(&_userRatings, _userRatingsFilename);
Logger::getInstance()->log("reading map 'episodeRatings' from file ...", LOG_DEBUG);
readMapFromFile(&_episodeRatings, _episodeRatingsFilename);
Logger::getInstance()->log("reading map 'detectiveRatings' from file ...", LOG_DEBUG);
readMapFromFile(&_detectiveRatings, _detectiveRatingsFilename);
Logger::getInstance()->log("reading maps from file done!", LOG_DEBUG);
}
void TatortTendencyParser::readMapFromFile(map<int, vector< pair<int, double> > > *data, string filename) {
ifstream ifile(filename);
if (!ifile.is_open())
throw MyException("EXCEPTION: file '" + filename + "' could not be opened for reading");
// DATAFILE format:
// key
// numberOfEntries
// int;double
int keyId;
int numberOfEntries;
int valId;
double val;
while (!ifile.eof()) {
ifile >> keyId;
ifile >> numberOfEntries;
vector<pair<int, double> > vec;
char delimiter;
for (int i = 0; i < numberOfEntries; i++) {
ifile >> valId >> delimiter >> val;
vec.push_back(pair<int, double>(valId, val));
}
data->insert(pair<int, vector< pair<int, double> > >(keyId, vec));
}
}
void TatortTendencyParser::clear() {
Parser::clear();
_userRatings.clear();
_episodeRatings.clear();
_detectiveRatings.clear();
_testData.clear();
}
map<int, vector< pair<int, double> > >* TatortTendencyParser::getUserRatingMap() {
return &_userRatings;
}
map<int, vector< pair<int, double> > >* TatortTendencyParser::getEpisodeRatingMap() {
return &_episodeRatings;
}
map<int, vector< pair<int, double> > >* TatortTendencyParser::getDetectiveRatingMap() {
return &_detectiveRatings;
}
vector<vector<int> >* TatortTendencyParser::getTestData() {
return &_testData;
}
vector<double>* TatortTendencyParser::getTestRatings() {
return &_testRatings;
}
// remove every user that rated less than 'threshold' items from 'inFilename' and write cleaned data to 'outFilename'
void TatortTendencyParser::cleanData(string inFilename, string delimiter, bool isHeaderPresent, string outFilename, int threshold) {
parseTrainData(inFilename, delimiter, isHeaderPresent);
vector<int> usersToRemove;
Logger::getInstance()->log("checking for users less than '"+ to_string(threshold) +"' ratings ...", LOG_DEBUG);
// iterate over users and check rating count per user
map<int, vector<pair<int, double> > >::iterator userRatingIter;
for (userRatingIter = _userRatings.begin(); userRatingIter != _userRatings.end(); userRatingIter++) {
int numOfRatings = userRatingIter->second.size();
// if rating count is less than threshold, add user to remove list
if (numOfRatings < threshold) {
usersToRemove.push_back(userRatingIter->first);
}
}
Logger::getInstance()->log("found '" + to_string(usersToRemove.size()) + "' users!", LOG_DEBUG);
Logger::getInstance()->log("writing resulting data to file '"+ outFilename +"' ...", LOG_DEBUG);
// write clean data to file
vector<string> userIdsPerLine = getColumn(0);
ofstream of(outFilename);
int headerOffset = 0;
if(isHeaderPresent) {
// write headline to file
of << _lines[0] << endl;
headerOffset = 1;
}
for (int i = 0; i < _numOfDatasets; i++) {
// if the user should not be removed, add appropriate line to file
vector<int>::iterator userIter = find(usersToRemove.begin(), usersToRemove.end(), stoi(userIdsPerLine[i]));
if (userIter == usersToRemove.end()) {
of << _lines[i + headerOffset] << endl;
}
}
Logger::getInstance()->log("writing clean data done!", LOG_DEBUG);
}