traininfo/provider/XmlStationProvider.java

package dk.thoerup.traininfo.provider;


import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.location.Location;
import android.util.Log;
import dk.thoerup.traininfo.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, List<StationBean>> stationCache = new AndroidTimeoutCache<String, List<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 List<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 List<StationBean> lookupStationsByName(String name) {            
                
        //      String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + Uri.encode(name);
                String url = "";
                
                try {
                        url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + URLEncoder.encode(name, "ISO8859-1");    
                } catch (Exception e) {
                        Log.e("lookupStations", "Encoding failed", e);
                }
                
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        
        @Override
        public List<StationBean> lookupStationsByIds(String ids) {
                String url = "";
                url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
                
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        public List<StationBean> lookupStationsWorker(String url) {
                
                List<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 List<StationBean> fetchStations(String url) {

                try {
                        List<StationBean> stations = new ArrayList<StationBean>();
                        
                        String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
                        
                        
                        Document doc = XmlUtil.parseXML(xml);
                        Node rootNode = doc.getDocumentElement(); // stations
                        NodeList stationList = rootNode.getChildNodes();
                        

                        for (int i=0; i<stationList.getLength(); i++) {
                                Node stationNode = stationList.item(i);
                                
                                if (! stationNode.getNodeName().equals("station"))
                                        continue;
        
                                StationBean station = new StationBean();
                                
                                NodeList stationElements = stationNode.getChildNodes();
                                for (int j=0; j<stationElements.getLength(); j++) {     
                                        Node current = stationElements.item(j);
                                                                                
                                        String content = null;
                                        if (current.getFirstChild() != null) 
                                                content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
                                        
                                        String nodeName = current.getNodeName();
                                        
                                        if (nodeName.equals("id"))
                                                station.setId( Integer.parseInt(content));
                                        
                                        if (nodeName.equals("name"))
                                                station.setName(content);
                                        
                                        if (nodeName.equals("latitude"))
                                                station.setLatitude( Double.parseDouble(content) );
                                        
                                        if (nodeName.equals("longitude"))
                                                station.setLongitude( Double.parseDouble(content) );
                                        
                                        if (nodeName.equals("calcdist"))
                                                station.setDistance( (int) Double.parseDouble(content) );
                                        
                                        if (nodeName.equals("address"))
                                                station.setAddress( content );
                                        
                                        if (nodeName.equals("regional"))
                                                station.setRegional( Boolean.parseBoolean(content) );
                                        
                                        if (nodeName.equals("strain"))
                                                station.setSTrain( Boolean.parseBoolean(content) );
                                        
                                        if (nodeName.equals("metro"))
                                                station.setMetro( Boolean.parseBoolean(content) );

                                }
                                stations.add(station);                          
                        }
                        return stations;
                        
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                        return null;
                }
        }
}
1	torben	294	package dk.thoerup.traininfo.provider;
2
3	torben	391
4	torben	383	import java.net.URLEncoder;
5	torben	294	import java.util.ArrayList;
6			import java.util.List;
7
8			import org.w3c.dom.Document;
9			import org.w3c.dom.Node;
10			import org.w3c.dom.NodeList;
11
12			import android.location.Location;
13			import android.util.Log;
14			import dk.thoerup.traininfo.StationBean;
15	torben	1004	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
16	torben	294	import dk.thoerup.traininfo.util.DownloadUtil;
17	torben	352	import dk.thoerup.traininfo.util.XmlUtil;
18	torben	294
19			public class XmlStationProvider implements StationProvider {
20	torben	1004
21			final static int CACHE_TIMEOUT = 300*1000;
22	torben	294
23	torben	1006	//List<StationBean> stations = new ArrayList<StationBean>();
24	torben	1004	AndroidTimeoutCache<String, List<StationBean>> stationCache = new AndroidTimeoutCache<String, List<StationBean>>(CACHE_TIMEOUT);
25	torben	294
26
27	torben	1031	double roundToPlaces(double value, int places) {
28			double pow = Math.pow(10, places);
29			double temp = Math.round( value*pow );
30
31			return temp / pow;
32			}
33	torben	381
34	torben	294	@Override
35	torben	1006	public List<StationBean> lookupStations(Location location) {
36	torben	1031	double lat = roundToPlaces(location.getLatitude(), 4);
37			double lng = roundToPlaces(location.getLongitude(), 4);
38
39			String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + lat + "&longitude=" + lng;
40	torben	294	Log.i("url", url);
41	torben	381	return lookupStationsWorker(url);
42			}
43
44			@Override
45	torben	1006	public List<StationBean> lookupStationsByName(String name) {
46	torben	383
47			// String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + Uri.encode(name);
48			String url = "";
49
50			try {
51			url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + URLEncoder.encode(name, "ISO8859-1");
52			} catch (Exception e) {
53			Log.e("lookupStations", "Encoding failed", e);
54			}
55
56	torben	381	Log.i("url", url);
57			return lookupStationsWorker(url);
58			}
59
60
61	torben	433	@Override
62	torben	1006	public List<StationBean> lookupStationsByIds(String ids) {
63	torben	433	String url = "";
64			url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
65
66			Log.i("url", url);
67			return lookupStationsWorker(url);
68			}
69	torben	1004
70	torben	1006	public List<StationBean> lookupStationsWorker(String url) {
71
72	torben	1004	List<StationBean> tmpStations = stationCache.get(url);
73
74			if (tmpStations != null) {
75			Log.i("lookupStations", "cache hit " + url);
76			} else {
77	torben	1006	tmpStations = fetchStations(url);
78	torben	1004
79	torben	1006	if (tmpStations != null) {
80			stationCache.put(url, tmpStations);
81	torben	1004	}
82			}
83
84	torben	1006	return tmpStations;
85	torben	1004	}
86	torben	433
87
88	torben	1006	public List<StationBean> fetchStations(String url) {
89	torben	381
90	torben	294	try {
91	torben	1006	List<StationBean> stations = new ArrayList<StationBean>();
92	torben	294
93	torben	302	String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
94	torben	294
95
96	torben	352	Document doc = XmlUtil.parseXML(xml);
97	torben	294	Node rootNode = doc.getDocumentElement(); // stations
98			NodeList stationList = rootNode.getChildNodes();
99
100
101			for (int i=0; i<stationList.getLength(); i++) {
102			Node stationNode = stationList.item(i);
103
104			if (! stationNode.getNodeName().equals("station"))
105			continue;
106
107			StationBean station = new StationBean();
108
109			NodeList stationElements = stationNode.getChildNodes();
110			for (int j=0; j<stationElements.getLength(); j++) {
111			Node current = stationElements.item(j);
112
113			String content = null;
114			if (current.getFirstChild() != null)
115			content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
116
117			String nodeName = current.getNodeName();
118
119	torben	310	if (nodeName.equals("id"))
120			station.setId( Integer.parseInt(content));
121
122	torben	294	if (nodeName.equals("name"))
123			station.setName(content);
124
125			if (nodeName.equals("latitude"))
126			station.setLatitude( Double.parseDouble(content) );
127
128			if (nodeName.equals("longitude"))
129	torben	575	station.setLongitude( Double.parseDouble(content) );
130	torben	294
131			if (nodeName.equals("calcdist"))
132			station.setDistance( (int) Double.parseDouble(content) );
133	torben	493
134			if (nodeName.equals("address"))
135			station.setAddress( content );
136	torben	551
137			if (nodeName.equals("regional"))
138			station.setRegional( Boolean.parseBoolean(content) );
139
140			if (nodeName.equals("strain"))
141			station.setSTrain( Boolean.parseBoolean(content) );
142
143			if (nodeName.equals("metro"))
144			station.setMetro( Boolean.parseBoolean(content) );
145	torben	294
146			}
147			stations.add(station);
148	torben	319	}
149	torben	1006	return stations;
150	torben	294
151
152			} catch (Exception e) {
153			Log.e("XmlStationProvider", "lookupStations: ", e);
154	torben	1006	return null;
155	torben	294	}
156			}
157			}