yahoofinance.histquotes.HistQuotesRequest Maven / Gradle / Ivy

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This library provides some methods that should make it easy to communicate with the Yahoo Finance API. It allows you to request detailed information, some statistics and historical quotes on stocks. Separate functionality is available to request a simple FX quote. Please check the javadoc to get a complete overview of the available methods and to get an idea of which data is available from Yahoo Finance.

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package yahoofinance.histquotes;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import yahoofinance.Utils;
import yahoofinance.YahooFinance;
import yahoofinance.util.RedirectableRequest;

/**
 *
 * @author Stijn Strickx
 */
public class HistQuotesRequest {

    private static final Logger log = LoggerFactory.getLogger(HistQuotesRequest.class);
    private final String symbol;

    private final Calendar from;
    private final Calendar to;

    private final Interval interval;

    public static final Calendar DEFAULT_FROM = Calendar.getInstance();

    static {
        DEFAULT_FROM.add(Calendar.YEAR, -1);
    }
    public static final Calendar DEFAULT_TO = Calendar.getInstance();
    public static final Interval DEFAULT_INTERVAL = Interval.MONTHLY;

    public HistQuotesRequest(String symbol) {
        this(symbol, DEFAULT_INTERVAL);
    }

    public HistQuotesRequest(String symbol, Interval interval) {
        this(symbol, DEFAULT_FROM, DEFAULT_TO, interval);
    }

    public HistQuotesRequest(String symbol, Calendar from, Calendar to) {
        this(symbol, from, to, DEFAULT_INTERVAL);
    }

    public HistQuotesRequest(String symbol, Calendar from, Calendar to, Interval interval) {
        this.symbol = symbol;
        this.from = this.cleanHistCalendar(from);
        this.to = this.cleanHistCalendar(to);
        this.interval = interval;
    }

    public HistQuotesRequest(String symbol, Date from, Date to) {
        this(symbol, from, to, DEFAULT_INTERVAL);
    }

    public HistQuotesRequest(String symbol, Date from, Date to, Interval interval) {
        this(symbol, interval);
        this.from.setTime(from);
        this.to.setTime(to);
        this.cleanHistCalendar(this.from);
        this.cleanHistCalendar(this.to);
    }
    
    /**
     * Put everything smaller than days at 0
     * @param cal calendar to be cleaned
     */
    private Calendar cleanHistCalendar(Calendar cal) {
        cal.set(Calendar.MILLISECOND, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.HOUR, 0);
        return cal;
    }

    public List getResult() throws IOException {

        List result = new ArrayList();
        
        if(this.from.after(this.to)) {
            log.warn("Unable to retrieve historical quotes. "
                    + "From-date should not be after to-date. From: "
                    + this.from.getTime() + ", to: " + this.to.getTime());
            return result;
        }
        
        Map params = new LinkedHashMap();
        params.put("s", this.symbol);

        params.put("a", String.valueOf(this.from.get(Calendar.MONTH)));
        params.put("b", String.valueOf(this.from.get(Calendar.DAY_OF_MONTH)));
        params.put("c", String.valueOf(this.from.get(Calendar.YEAR)));

        params.put("d", String.valueOf(this.to.get(Calendar.MONTH)));
        params.put("e", String.valueOf(this.to.get(Calendar.DAY_OF_MONTH)));
        params.put("f", String.valueOf(this.to.get(Calendar.YEAR)));

        params.put("g", this.interval.getTag());

        params.put("ignore", ".csv");

        String url = YahooFinance.HISTQUOTES_BASE_URL + "?" + Utils.getURLParameters(params);

        // Get CSV from Yahoo
        log.info("Sending request: " + url);

        URL request = new URL(url);
        RedirectableRequest redirectableRequest = new RedirectableRequest(request, 5);
        redirectableRequest.setConnectTimeout(YahooFinance.CONNECTION_TIMEOUT);
        redirectableRequest.setReadTimeout(YahooFinance.CONNECTION_TIMEOUT);
        URLConnection connection = redirectableRequest.openConnection();

        InputStreamReader is = new InputStreamReader(connection.getInputStream());
        BufferedReader br = new BufferedReader(is);
        br.readLine(); // skip the first line
        // Parse CSV
        for (String line = br.readLine(); line != null; line = br.readLine()) {

            log.info("Parsing CSV line: " + Utils.unescape(line));
            HistoricalQuote quote = this.parseCSVLine(line);
            result.add(quote);
        }
        return result;
    }

    private HistoricalQuote parseCSVLine(String line) {
        String[] data = line.split(YahooFinance.QUOTES_CSV_DELIMITER);
        return new HistoricalQuote(this.symbol,
                Utils.parseHistDate(data[0]),
                Utils.getBigDecimal(data[1]),
                Utils.getBigDecimal(data[3]),
                Utils.getBigDecimal(data[2]),
                Utils.getBigDecimal(data[4]),
                Utils.getBigDecimal(data[6]),
                Utils.getLong(data[5])
        );
    }

}