ブクログから「読み終えた」冊数を取得するスクレイパーをJavaで

Booklog.java

package info.bouzuya.booklog;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.TextNode;
import org.jsoup.select.Elements;

public class Booklog {

    public int getReadCount(String username) {
        String url = "http://booklog.jp/users/" + username;
        Document document = getDocument(url);
        Map<Status, Integer> counts = getCounts(document);
        return counts.get(Status.READ).intValue();
    }

    private Document getDocument(String url) {
        try {
            return Jsoup.connect(url).get();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private Map<Status, Integer> getCounts(Document document) {
        Map<Status, Integer> counts = new HashMap<Status, Integer>();
        Elements conditions = document.select("div.box h5");
        for (Element condition : conditions) {
            String conditionText = condition.text();
            if (!conditionText.equals("読書状況")) {
                continue;
            }

            Element ul = condition.nextElementSibling();
            Elements children = ul.children();
            for (Element child : children) {
                Element childLabel = child.children().first();
                String statusString = childLabel.text();
                Status key = Status.parse(statusString);

                StringBuilder sb = new StringBuilder();
                for (TextNode tn : child.textNodes()) {
                    sb.append(tn.text());
                }
                String valueWithParen = sb.toString();

                Pattern pattern = Pattern.compile("^\\s*\\((\\d+)\\)\\s*$");
                Matcher matcher = pattern.matcher(valueWithParen);
                if (!matcher.matches()) {
                    throw new IllegalStateException("no match found");
                }
                String valueAsString = matcher.group(1);
                Integer value = Integer.valueOf(valueAsString);

                counts.put(key, value);
            }
        }

        return counts;
    }

    public static void main(String[] args) {
        Booklog booklog = new Booklog();
        System.out.println(booklog.getReadCount("bouzuya"));
    }
}