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);
        
        @Override
        public List<StationBean> getStations() {
                return stations;
        }


        @Override
        public boolean lookupStations(Location location) {
                String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + (float)location.getLatitude() + "&longitude=" + (float)location.getLongitude();
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        @Override
        public boolean 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 boolean lookupStationsByIds(String ids) {
                String url = "";
                url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
                
                Log.i("url", url);
                return lookupStationsWorker(url);
        }
        
        public boolean lookupStationsWorker(String url) {
                boolean result;
                List<StationBean> tmpStations = stationCache.get(url);
                
                if (tmpStations != null) {
                        Log.i("lookupStations", "cache hit " + url);
                        stations = tmpStations;
                        result = true;
                } else {
                        result = fetchStations(url);
                        
                        if (result == true) {
                                stationCache.put(url, stations);
                        }
                }
                
                return result;
        }


        public boolean fetchStations(String url) {
                boolean success = false;

                try {
                        stations.clear();
                        
                        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);                          
                        }
                        success = true;
                        
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                }
                return success;
        }
}
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			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			@Override
27			public List<StationBean> getStations() {
28			return stations;
29			}
30
31	torben	381
32	torben	294	@Override
33	torben	319	public boolean lookupStations(Location location) {
34	torben	564	String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + (float)location.getLatitude() + "&longitude=" + (float)location.getLongitude();
35	torben	294	Log.i("url", url);
36	torben	381	return lookupStationsWorker(url);
37			}
38
39			@Override
40	torben	433	public boolean lookupStationsByName(String name) {
41	torben	383
42			// String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + Uri.encode(name);
43			String url = "";
44
45			try {
46			url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + URLEncoder.encode(name, "ISO8859-1");
47			} catch (Exception e) {
48			Log.e("lookupStations", "Encoding failed", e);
49			}
50
51	torben	381	Log.i("url", url);
52			return lookupStationsWorker(url);
53			}
54
55
56	torben	433	@Override
57			public boolean lookupStationsByIds(String ids) {
58			String url = "";
59			url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
60
61			Log.i("url", url);
62			return lookupStationsWorker(url);
63			}
64	torben	1004
65			public boolean lookupStationsWorker(String url) {
66			boolean result;
67			List<StationBean> tmpStations = stationCache.get(url);
68
69			if (tmpStations != null) {
70			Log.i("lookupStations", "cache hit " + url);
71	torben	1005	stations = tmpStations;
72	torben	1004	result = true;
73			} else {
74			result = fetchStations(url);
75
76			if (result == true) {
77			stationCache.put(url, stations);
78			}
79			}
80
81			return result;
82			}
83	torben	433
84
85	torben	1004	public boolean fetchStations(String url) {
86	torben	381	boolean success = false;
87
88	torben	294	try {
89			stations.clear();
90
91	torben	302	String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
92	torben	294
93
94	torben	352	Document doc = XmlUtil.parseXML(xml);
95	torben	294	Node rootNode = doc.getDocumentElement(); // stations
96			NodeList stationList = rootNode.getChildNodes();
97
98
99			for (int i=0; i<stationList.getLength(); i++) {
100			Node stationNode = stationList.item(i);
101
102			if (! stationNode.getNodeName().equals("station"))
103			continue;
104
105			StationBean station = new StationBean();
106
107			NodeList stationElements = stationNode.getChildNodes();
108			for (int j=0; j<stationElements.getLength(); j++) {
109			Node current = stationElements.item(j);
110
111			String content = null;
112			if (current.getFirstChild() != null)
113			content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
114
115			String nodeName = current.getNodeName();
116
117	torben	310	if (nodeName.equals("id"))
118			station.setId( Integer.parseInt(content));
119
120	torben	294	if (nodeName.equals("name"))
121			station.setName(content);
122
123			if (nodeName.equals("latitude"))
124			station.setLatitude( Double.parseDouble(content) );
125
126			if (nodeName.equals("longitude"))
127	torben	575	station.setLongitude( Double.parseDouble(content) );
128	torben	294
129			if (nodeName.equals("calcdist"))
130			station.setDistance( (int) Double.parseDouble(content) );
131	torben	493
132			if (nodeName.equals("address"))
133			station.setAddress( content );
134	torben	551
135			if (nodeName.equals("regional"))
136			station.setRegional( Boolean.parseBoolean(content) );
137
138			if (nodeName.equals("strain"))
139			station.setSTrain( Boolean.parseBoolean(content) );
140
141			if (nodeName.equals("metro"))
142			station.setMetro( Boolean.parseBoolean(content) );
143	torben	294
144			}
145			stations.add(station);
146	torben	319	}
147			success = true;
148	torben	294
149
150			} catch (Exception e) {
151			Log.e("XmlStationProvider", "lookupStations: ", e);
152			}
153	torben	319	return success;
154	torben	294	}
155			}