traininfo/provider/XmlTimetableProvider.java

package dk.thoerup.traininfo.provider;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

import android.util.Log;
import dk.thoerup.android.traininfo.common.TimetableBean;
import dk.thoerup.traininfo.util.AndroidTimeoutCache;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.XmlUtil;

public class XmlTimetableProvider implements TimetableProvider {
        
        final static int CACHE_TIMEOUT = 60*1000;

        AndroidTimeoutCache<String,TimetableBean> timetableCache = new AndroidTimeoutCache<String,TimetableBean>(CACHE_TIMEOUT);        

        @Override
        public TimetableBean lookupTimetable(String type, String trainID) {
                
                String trainNumber = extractTrainNumber(trainID);
                
                String key = type + "-" + trainID;
                TimetableBean timetables = timetableCache.get(key);
        
                if (timetables == null) {                       
                        timetables = lookupTimetableWorker(type, trainNumber);
                        
                        if (timetables != null) {                       
                                timetableCache.put(key, timetables);
                        }
                        
                } else {
                        Log.i("XmlTimetableProvider", "cache hit !!!");
                }               
                
                return timetables;
        }
        

        public TimetableBean lookupTimetableWorker(String type, String trainNumber) {

                String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
                Log.i("url", url);
                try {
                        
                        String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
                        
                        Serializer serializer = new Persister();

                        TimetableBean timetables = serializer.read(TimetableBean.class, xml);
                        
                        
                        return timetables;
                        
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                }

                return null;
        }
        
        private String extractTrainNumber (String trainID) {

                String parts[]  = trainID.split(" ");
                if (parts.length == 2) {
                        return parts[1];
                } else {
                        return parts[0];
                }
        }

}
1	torben	352	package dk.thoerup.traininfo.provider;
2
3	torben	1066	import org.simpleframework.xml.Serializer;
4			import org.simpleframework.xml.core.Persister;
5	torben	352
6			import android.util.Log;
7	torben	1066	import dk.thoerup.android.traininfo.common.TimetableBean;
8	torben	391	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
9	torben	352	import dk.thoerup.traininfo.util.DownloadUtil;
10			import dk.thoerup.traininfo.util.XmlUtil;
11
12			public class XmlTimetableProvider implements TimetableProvider {
13
14	torben	391	final static int CACHE_TIMEOUT = 60*1000;
15	torben	352
16	torben	1066	AndroidTimeoutCache<String,TimetableBean> timetableCache = new AndroidTimeoutCache<String,TimetableBean>(CACHE_TIMEOUT);
17	torben	352
18			@Override
19	torben	1066	public TimetableBean lookupTimetable(String type, String trainID) {
20	torben	391
21	torben	699	String trainNumber = extractTrainNumber(trainID);
22
23			String key = type + "-" + trainID;
24	torben	1066	TimetableBean timetables = timetableCache.get(key);
25	torben	391
26			if (timetables == null) {
27	torben	1007	timetables = lookupTimetableWorker(type, trainNumber);
28	torben	391
29	torben	1007	if (timetables != null) {
30	torben	1027	timetableCache.put(key, timetables);
31	torben	391	}
32
33			} else {
34			Log.i("XmlTimetableProvider", "cache hit !!!");
35			}
36
37	torben	1007	return timetables;
38	torben	391	}
39
40
41	torben	1066	public TimetableBean lookupTimetableWorker(String type, String trainNumber) {
42	torben	1007
43	torben	699	String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
44	torben	352	Log.i("url", url);
45			try {
46
47			String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
48
49	torben	1066	Serializer serializer = new Persister();
50
51			TimetableBean timetables = serializer.read(TimetableBean.class, xml);
52	torben	352
53
54	torben	1007	return timetables;
55	torben	352
56
57			} catch (Exception e) {
58			Log.e("XmlStationProvider", "lookupStations: ", e);
59			}
60	torben	699
61	torben	1007	return null;
62	torben	352	}
63	torben	699
64			private String extractTrainNumber (String trainID) {
65	torben	352
66	torben	699	String parts[] = trainID.split(" ");
67			if (parts.length == 2) {
68			return parts[1];
69			} else {
70			return parts[0];
71			}
72			}
73
74	torben	352	}