/**
* The MIT License (MIT)
*
* Copyright (c) 2014-2017 Marc de Verdelhan & respective authors (see AUTHORS)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package ta4jexamples.loaders;
import au.com.bytecode.opencsv.CSVReader;
import eu.verdelhan.ta4j.Tick;
import eu.verdelhan.ta4j.TimeSeries;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.joda.time.DateTime;
import org.joda.time.Instant;
import org.joda.time.Period;
/**
* This class build a Ta4j time series from a CSV file containing trades.
*/
public class CsvTradesLoader {
/**
* @return a time series from Bitstamp (bitcoin exchange) trades
*/
public static TimeSeries loadBitstampSeries() {
// Reading all lines of the CSV file
InputStream stream = CsvTradesLoader.class.getClassLoader().getResourceAsStream("bitstamp_trades_from_20131125_usd.csv");
CSVReader csvReader = null;
List<String[]> lines = null;
try {
csvReader = new CSVReader(new InputStreamReader(stream, Charset.forName("UTF-8")), ',');
lines = csvReader.readAll();
lines.remove(0); // Removing header line
} catch (IOException ioe) {
Logger.getLogger(CsvTradesLoader.class.getName()).log(Level.SEVERE, "Unable to load trades from CSV", ioe);
} finally {
if (csvReader != null) {
try {
csvReader.close();
} catch (IOException ioe) {
}
}
}
List<Tick> ticks = null;
if ((lines != null) && !lines.isEmpty()) {
// Getting the first and last trades timestamps
DateTime beginTime = new DateTime(Long.parseLong(lines.get(0)[0]) * 1000);
DateTime endTime = new DateTime(Long.parseLong(lines.get(lines.size() - 1)[0]) * 1000);
if (beginTime.isAfter(endTime)) {
Instant beginInstant = beginTime.toInstant();
Instant endInstant = endTime.toInstant();
beginTime = new DateTime(endInstant);
endTime = new DateTime(beginInstant);
// Since the CSV file has the most recent trades at the top of the file, we'll reverse the list to feed the List<Tick> correctly.
Collections.reverse(lines);
}
// Building the empty ticks (every 300 seconds, yeah welcome in Bitcoin world)
ticks = buildEmptyTicks(beginTime, endTime, 300);
// Filling the ticks with trades
for (String[] tradeLine : lines) {
DateTime tradeTimestamp = new DateTime(Long.parseLong(tradeLine[0]) * 1000);
for (Tick tick : ticks) {
if (tick.inPeriod(tradeTimestamp)) {
double tradePrice = Double.parseDouble(tradeLine[1]);
double tradeAmount = Double.parseDouble(tradeLine[2]);
tick.addTrade(tradeAmount, tradePrice);
}
}
}
// Removing still empty ticks
removeEmptyTicks(ticks);
}
return new TimeSeries("bitstamp_trades", ticks);
}
/**
* Builds a list of empty ticks.
* @param beginTime the begin time of the whole period
* @param endTime the end time of the whole period
* @param duration the tick duration (in seconds)
* @return the list of empty ticks
*/
private static List<Tick> buildEmptyTicks(DateTime beginTime, DateTime endTime, int duration) {
List<Tick> emptyTicks = new ArrayList<Tick>();
Period tickTimePeriod = Period.seconds(duration);
DateTime tickEndTime = beginTime;
do {
tickEndTime = tickEndTime.plus(tickTimePeriod);
emptyTicks.add(new Tick(tickTimePeriod, tickEndTime));
} while (tickEndTime.isBefore(endTime));
return emptyTicks;
}
/**
* Removes all empty (i.e. with no trade) ticks of the list.
* @param ticks a list of ticks
*/
private static void removeEmptyTicks(List<Tick> ticks) {
for (int i = ticks.size() - 1; i >= 0; i--) {
if (ticks.get(i).getTrades() == 0) {
ticks.remove(i);
}
}
}
public static void main(String[] args) {
TimeSeries series = CsvTradesLoader.loadBitstampSeries();
System.out.println("Series: " + series.getName() + " (" + series.getSeriesPeriodDescription() + ")");
System.out.println("Number of ticks: " + series.getTickCount());
System.out.println("First tick: \n"
+ "\tVolume: " + series.getTick(0).getVolume() + "\n"
+ "\tNumber of trades: " + series.getTick(0).getTrades() + "\n"
+ "\tClose price: " + series.getTick(0).getClosePrice());
}
}