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	package dk.thoerup.traininfo.provider;
2
3
4	import java.net.URLEncoder;
5	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	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
16	import dk.thoerup.traininfo.util.DownloadUtil;
17	import dk.thoerup.traininfo.util.XmlUtil;
18
19	public class XmlStationProvider implements StationProvider {
20
21	final static int CACHE_TIMEOUT = 300*1000;
22
23	//List<StationBean> stations = new ArrayList<StationBean>();
24	AndroidTimeoutCache<String, List<StationBean>> stationCache = new AndroidTimeoutCache<String, List<StationBean>>(CACHE_TIMEOUT);
25
26
27	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
34	@Override
35	public List<StationBean> lookupStations(Location location) {
36	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	Log.i("url", url);
41	return lookupStationsWorker(url);
42	}
43
44	@Override
45	public List<StationBean> lookupStationsByName(String name) {
46
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	Log.i("url", url);
57	return lookupStationsWorker(url);
58	}
59
60
61	@Override
62	public List<StationBean> lookupStationsByIds(String ids) {
63	String url = "";
64	url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids;
65
66	Log.i("url", url);
67	return lookupStationsWorker(url);
68	}
69
70	public List<StationBean> lookupStationsWorker(String url) {
71
72	List<StationBean> tmpStations = stationCache.get(url);
73
74	if (tmpStations != null) {
75	Log.i("lookupStations", "cache hit " + url);
76	} else {
77	tmpStations = fetchStations(url);
78
79	if (tmpStations != null) {
80	stationCache.put(url, tmpStations);
81	}
82	}
83
84	return tmpStations;
85	}
86
87
88	public List<StationBean> fetchStations(String url) {
89
90	try {
91	List<StationBean> stations = new ArrayList<StationBean>();
92
93	String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
94
95
96	Document doc = XmlUtil.parseXML(xml);
97	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	if (nodeName.equals("id"))
120	station.setId( Integer.parseInt(content));
121
122	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	station.setLongitude( Double.parseDouble(content) );
130
131	if (nodeName.equals("calcdist"))
132	station.setDistance( (int) Double.parseDouble(content) );
133
134	if (nodeName.equals("address"))
135	station.setAddress( content );
136
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
146	}
147	stations.add(station);
148	}
149	return stations;
150
151
152	} catch (Exception e) {
153	Log.e("XmlStationProvider", "lookupStations: ", e);
154	return null;
155	}
156	}
157	}