traininfo/provider/XmlStationProvider.java

package dk.thoerup.traininfo.provider;


import java.net.URLEncoder;

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


import android.location.Location;
import android.util.Log;
import dk.thoerup.android.traininfo.common.StationBean;
import dk.thoerup.traininfo.util.AndroidTimeoutCache;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.XmlUtil;

public class XmlStationProvider implements StationProvider {
        
        final static int CACHE_TIMEOUT = 300*1000;

        //List<StationBean> stations = new ArrayList<StationBean>();    
        AndroidTimeoutCache<String, StationBean> stationCache = new AndroidTimeoutCache<String, StationBean>(CACHE_TIMEOUT);
        

        double roundToPlaces(double value, int places) {
                double pow = Math.pow(10, places);
                double temp = Math.round( value*pow );
                
                return temp / pow;
        }

        @Override
        public StationBean lookupStations(Location location) {
                double lat = roundToPlaces(location.getLatitude(), 4);
                double lng = roundToPlaces(location.getLongitude(), 4);
                
                String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng;
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        @Override
        public StationBean lookupStationsByName(String name) {          
                
                try {
                        name = URLEncoder.encode(name, "ISO8859-1");    
                } catch (Exception e) {
                        Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
                }
                
                String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name;
                
                
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        
        @Override
        public StationBean lookupStationsByIds(String ids) {
                String url = "";
                url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
                
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        public StationBean lookupStationsWorker(String url) {
                
                StationBean tmpStations = stationCache.get(url);
                
                if (tmpStations != null) {
                        Log.i("lookupStations", "cache hit " + url);
                } else {
                        tmpStations = fetchStations(url);
                        
                        if (tmpStations != null) {
                                stationCache.put(url, tmpStations);
                        }
                }
                
                return tmpStations;
        }


        public StationBean fetchStations(String url) {

                try {
                        
                        String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
                        
                        Serializer serializer = new Persister();

                        StationBean stations = serializer.read(StationBean.class, xml);
                        
                        return stations;
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                        return null;
                }
        }
}
1	package dk.thoerup.traininfo.provider;
2
3
4	import java.net.URLEncoder;
5
6	import org.simpleframework.xml.Serializer;
7	import org.simpleframework.xml.core.Persister;
8
9
10	import android.location.Location;
11	import android.util.Log;
12	import dk.thoerup.android.traininfo.common.StationBean;
13	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
14	import dk.thoerup.traininfo.util.DownloadUtil;
15	import dk.thoerup.traininfo.util.XmlUtil;
16
17	public class XmlStationProvider implements StationProvider {
18
19	final static int CACHE_TIMEOUT = 300*1000;
20
21	//List<StationBean> stations = new ArrayList<StationBean>();
22	AndroidTimeoutCache<String, StationBean> stationCache = new AndroidTimeoutCache<String, StationBean>(CACHE_TIMEOUT);
23
24
25	double roundToPlaces(double value, int places) {
26	double pow = Math.pow(10, places);
27	double temp = Math.round( value*pow );
28
29	return temp / pow;
30	}
31
32	@Override
33	public StationBean lookupStations(Location location) {
34	double lat = roundToPlaces(location.getLatitude(), 4);
35	double lng = roundToPlaces(location.getLongitude(), 4);
36
37	String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng;
38	Log.i("url", url);
39	return lookupStationsWorker(url);
40	}
41
42	@Override
43	public StationBean lookupStationsByName(String name) {
44
45	try {
46	name = URLEncoder.encode(name, "ISO8859-1");
47	} catch (Exception e) {
48	Log.e("lookupStations", "Encoding failed", e);//if encoding fails use original and hope for the best
49	}
50
51	String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + name;
52
53
54	Log.i("url", url);
55	return lookupStationsWorker(url);
56	}
57
58
59	@Override
60	public StationBean lookupStationsByIds(String ids) {
61	String url = "";
62	url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
63
64	Log.i("url", url);
65	return lookupStationsWorker(url);
66	}
67
68	public StationBean lookupStationsWorker(String url) {
69
70	StationBean tmpStations = stationCache.get(url);
71
72	if (tmpStations != null) {
73	Log.i("lookupStations", "cache hit " + url);
74	} else {
75	tmpStations = fetchStations(url);
76
77	if (tmpStations != null) {
78	stationCache.put(url, tmpStations);
79	}
80	}
81
82	return tmpStations;
83	}
84
85
86	public StationBean fetchStations(String url) {
87
88	try {
89
90	String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
91
92	Serializer serializer = new Persister();
93
94	StationBean stations = serializer.read(StationBean.class, xml);
95
96	return stations;
97
98	} catch (Exception e) {
99	Log.e("XmlStationProvider", "lookupStations: ", e);
100	return null;
101	}
102	}
103	}