traininfo/provider/XmlTimetableProvider.java

package dk.thoerup.traininfo.provider;

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.util.Log;
import dk.thoerup.traininfo.TimetableBean;
import dk.thoerup.traininfo.util.AndroidTimeoutCache;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.XmlUtil;

public class XmlTimetableProvider implements TimetableProvider {
        
        final static int CACHE_TIMEOUT = 60*1000;
        
        List<TimetableBean> timetables;

        AndroidTimeoutCache<String,List<TimetableBean>> departureCache = new AndroidTimeoutCache<String,List<TimetableBean>>(CACHE_TIMEOUT);
        
        @Override
        public List<TimetableBean> getTimetable(String trainID) {
                List<TimetableBean> list = departureCache.get(trainID);
                
                if (list == null) {                     
                        list = new ArrayList<TimetableBean>();
                } 
                
                return list;
        }

        @Override
        public boolean lookupTimetable(String trainID) {
                boolean success;
                
                timetables = departureCache.get(trainID);
        
                if (timetables == null) {                       
                        success = lookupTimetableWorker(trainID);
                        
                        if (success) {                  
                                departureCache.put(trainID, timetables);
                        }
                        
                } else {
                        Log.i("XmlTimetableProvider", "cache hit !!!");
                        success = true;
                }               
                
                return success;
        }
        

        public boolean lookupTimetableWorker(String trainID) {
                boolean success = false;
                String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainID.replace(" ", "%20") ;
                Log.i("url", url);
                try {
                        timetables = new ArrayList<TimetableBean>();
                        
                        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 entryNode = stationList.item(i);
                                
                                if (! entryNode.getNodeName().equals("entry"))
                                        continue;
        
                                TimetableBean timetable = new TimetableBean();
                                
                                NodeList entries = entryNode.getChildNodes();                           
                                
                                if (entryNode.hasAttributes() && entryNode.getAttributes().getNamedItem("current") != null) {                                   
                                        timetable.setCurrent( Boolean.parseBoolean(entryNode.getAttributes().getNamedItem("current").getNodeValue()));
                                } else {
                                        timetable.setCurrent(false);
                                }
                                
                                for (int j=0; j<entries.getLength(); j++) {     
                                        Node current = entries.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("station"))
                                                timetable.setStation( content );                                                
                                        
                                        if (nodeName.equals("arrival"))
                                                timetable.setArrival( content );
                                        
                                        if (nodeName.equals("departure"))
                                                timetable.setDeparture( content );
                                        
                                        /*if (nodeName.equals("current"))
                                                timetable.setCurrent( Boolean.parseBoolean(content) );*/

                                }
                                timetables.add(timetable);                              
                        }
                        success = true;
                        
                        
                } catch (Exception e) {
                        Log.e("XmlStationProvider", "lookupStations: ", e);
                }
                return success;

        }

}
1	torben	352	package dk.thoerup.traininfo.provider;
2
3			import java.util.ArrayList;
4			import java.util.List;
5
6			import org.w3c.dom.Document;
7	torben	391
8	torben	352	import org.w3c.dom.Node;
9			import org.w3c.dom.NodeList;
10
11			import android.util.Log;
12			import dk.thoerup.traininfo.TimetableBean;
13	torben	391	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
14	torben	352	import dk.thoerup.traininfo.util.DownloadUtil;
15			import dk.thoerup.traininfo.util.XmlUtil;
16
17			public class XmlTimetableProvider implements TimetableProvider {
18
19	torben	391	final static int CACHE_TIMEOUT = 60*1000;
20
21			List<TimetableBean> timetables;
22	torben	352
23	torben	391	AndroidTimeoutCache<String,List<TimetableBean>> departureCache = new AndroidTimeoutCache<String,List<TimetableBean>>(CACHE_TIMEOUT);
24
25	torben	352	@Override
26	torben	391	public List<TimetableBean> getTimetable(String trainID) {
27			List<TimetableBean> list = departureCache.get(trainID);
28
29			if (list == null) {
30			list = new ArrayList<TimetableBean>();
31			}
32
33			return list;
34	torben	352	}
35
36			@Override
37			public boolean lookupTimetable(String trainID) {
38	torben	391	boolean success;
39
40			timetables = departureCache.get(trainID);
41
42			if (timetables == null) {
43			success = lookupTimetableWorker(trainID);
44
45			if (success) {
46			departureCache.put(trainID, timetables);
47			}
48
49			} else {
50			Log.i("XmlTimetableProvider", "cache hit !!!");
51			success = true;
52			}
53
54			return success;
55			}
56
57
58			public boolean lookupTimetableWorker(String trainID) {
59	torben	352	boolean success = false;
60	torben	365	String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainID.replace(" ", "%20") ;
61	torben	352	Log.i("url", url);
62			try {
63	torben	391	timetables = new ArrayList<TimetableBean>();
64	torben	352
65			String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
66
67
68			Document doc = XmlUtil.parseXML(xml);
69			Node rootNode = doc.getDocumentElement(); // stations
70			NodeList stationList = rootNode.getChildNodes();
71
72
73			for (int i=0; i<stationList.getLength(); i++) {
74			Node entryNode = stationList.item(i);
75
76			if (! entryNode.getNodeName().equals("entry"))
77			continue;
78
79			TimetableBean timetable = new TimetableBean();
80
81	torben	365	NodeList entries = entryNode.getChildNodes();
82
83			if (entryNode.hasAttributes() && entryNode.getAttributes().getNamedItem("current") != null) {
84			timetable.setCurrent( Boolean.parseBoolean(entryNode.getAttributes().getNamedItem("current").getNodeValue()));
85			} else {
86			timetable.setCurrent(false);
87			}
88
89	torben	352	for (int j=0; j<entries.getLength(); j++) {
90			Node current = entries.item(j);
91
92			String content = null;
93			if (current.getFirstChild() != null)
94			content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
95
96			String nodeName = current.getNodeName();
97
98			if (nodeName.equals("station"))
99			timetable.setStation( content );
100
101			if (nodeName.equals("arrival"))
102			timetable.setArrival( content );
103
104			if (nodeName.equals("departure"))
105			timetable.setDeparture( content );
106
107	torben	365	/*if (nodeName.equals("current"))
108			timetable.setCurrent( Boolean.parseBoolean(content) );*/
109	torben	352
110			}
111			timetables.add(timetable);
112			}
113			success = true;
114
115
116			} catch (Exception e) {
117			Log.e("XmlStationProvider", "lookupStations: ", e);
118			}
119			return success;
120
121			}
122
123			}