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package dk.thoerup.traininfo.provider;
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import org.simpleframework.xml.Serializer;
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import org.simpleframework.xml.core.Persister;
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import android.util.Log;
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import dk.thoerup.android.traininfo.common.TimetableBean;
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import dk.thoerup.traininfo.util.AndroidTimeoutCache;
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import dk.thoerup.traininfo.util.DownloadUtil;
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import dk.thoerup.traininfo.util.XmlUtil;
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public class XmlTimetableProvider implements TimetableProvider {
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final static int CACHE_TIMEOUT = 60*1000;
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AndroidTimeoutCache<String,TimetableBean> timetableCache = new AndroidTimeoutCache<String,TimetableBean>(CACHE_TIMEOUT);
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@Override
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public TimetableBean lookupTimetable(String type, String trainID) {
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String trainNumber = extractTrainNumber(trainID);
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String key = type + "-" + trainID;
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TimetableBean timetables = timetableCache.get(key);
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if (timetables == null) {
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timetables = lookupTimetableWorker(type, trainNumber);
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if (timetables != null) {
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timetableCache.put(key, timetables);
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}
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} else {
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Log.i("XmlTimetableProvider", "cache hit !!!");
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}
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return timetables;
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}
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public TimetableBean lookupTimetableWorker(String type, String trainNumber) {
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String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
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Log.i("url", url);
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try {
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String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
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Serializer serializer = new Persister();
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TimetableBean timetables = serializer.read(TimetableBean.class, xml);
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return timetables;
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} catch (Exception e) {
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Log.e("XmlStationProvider", "lookupStations: ", e);
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}
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return null;
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}
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private String extractTrainNumber (String trainID) {
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String parts[] = trainID.split(" ");
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if (parts.length == 2) {
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return parts[1];
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} else {
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return parts[0];
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}
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}
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@Override
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public void purgeOldEntries() {
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timetableCache.purgeOldEntries();
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}
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}
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