de.dlopes.stocks.facilitator.services.impl.FinanznachrichtenOrderbuchExtractorImpl.java Source code

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Here is the source code for de.dlopes.stocks.facilitator.services.impl.FinanznachrichtenOrderbuchExtractorImpl.java

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/*******************************************************************************
 * Copyright (c) 2016 Dominique Lopes.
 * All rights reserved. 
 *
 * This Source Code Form is subject to the terms of the Mozilla Public 
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Contributors:
 *     Dominique Lopes - initial API and implementation
 *******************************************************************************/
package de.dlopes.stocks.facilitator.services.impl;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.util.StringUtils;

import de.dlopes.stocks.facilitator.services.FinanceDataExtractor;

public class FinanznachrichtenOrderbuchExtractorImpl implements FinanceDataExtractor {

    public static final String PREFIX = "http://aktienkurs-orderbuch.finanznachrichten.de/";

    @Override
    public boolean isApplicable(String url) {

        // guard: ensure an URL is given
        if (url == null) {
            return false;
        }

        // guard: ensure this method is only used for it's intended purpose - to load ISINs from 
        // the german website www.finanzen.net
        if (!url.startsWith(PREFIX)) {
            return false;
        }

        return true;
    }

    @Override
    public List<String> getFinanceData(String url) {
        return getFinanceData(url, FinanceDataType.ISIN);
    }

    @Override
    public List<String> getFinanceData(String url, FinanceDataType dataType) {

        List<String> list = new ArrayList<String>();

        try {

            Document doc = null;
            if (url.startsWith("file://")) {
                File input = new File(url.replaceFirst("file://", ""));
                doc = Jsoup.parse(input, "UTF-8");
            } else {
                URL input = new URL(url);
                doc = Jsoup.parse(input, 30000);
            }

            Elements elements = doc.body().select("span[id^=productid] > span");

            for (Element e : elements) {
                String text = e.text();

                // Guard: move on when the text is empty
                if (StringUtils.isEmpty(text)) {
                    continue;
                }

                text = StringUtils.trimAllWhitespace(text);

                // Guard: move on when the text does not contain the ISIN or WKN
                if (!text.startsWith(dataType.name() + ":")) {
                    continue;
                }

                text = text.replace(dataType.name() + ":", "");
                list.add(text);

            }

        } catch (IOException e) {
            e.printStackTrace();
        }

        return list;

    }

}