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	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	@Override
27	public List<StationBean> getStations() {
28	return stations;
29	}
30
31
32	@Override
33	public boolean lookupStations(Location location) {
34	String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + (float)location.getLatitude() + "&longitude=" + (float)location.getLongitude();
35	Log.i("url", url);
36	return lookupStationsWorker(url);
37	}
38
39	@Override
40	public boolean lookupStationsByName(String name) {
41
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	Log.i("url", url);
52	return lookupStationsWorker(url);
53	}
54
55
56	@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
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	stations = tmpStations;
72	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
84
85	public boolean fetchStations(String url) {
86	boolean success = false;
87
88	try {
89	stations.clear();
90
91	String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
92
93
94	Document doc = XmlUtil.parseXML(xml);
95	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	if (nodeName.equals("id"))
118	station.setId( Integer.parseInt(content));
119
120	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	station.setLongitude( Double.parseDouble(content) );
128
129	if (nodeName.equals("calcdist"))
130	station.setDistance( (int) Double.parseDouble(content) );
131
132	if (nodeName.equals("address"))
133	station.setAddress( content );
134
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
144	}
145	stations.add(station);
146	}
147	success = true;
148
149
150	} catch (Exception e) {
151	Log.e("XmlStationProvider", "lookupStations: ", e);
152	}
153	return success;
154	}
155	}