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 type, String trainID) {
                String key = type + "-" + trainID;
                List<TimetableBean> list = departureCache.get(key);
                
                if (list == null) {                     
                        list = new ArrayList<TimetableBean>();
                } 
                
                return list;
        }

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

        public boolean lookupTimetableWorker(String type, String trainNumber) {
                boolean success = false;
                String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
                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;

        }
        
        private String extractTrainNumber (String trainID) {

                String parts[]  = trainID.split(" ");
                if (parts.length == 2) {
                        return parts[1];
                } else {
                        return parts[0];
                }
        }

}
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	699	public List<TimetableBean> getTimetable(String type, String trainID) {
27			String key = type + "-" + trainID;
28			List<TimetableBean> list = departureCache.get(key);
29	torben	391
30			if (list == null) {
31			list = new ArrayList<TimetableBean>();
32			}
33
34			return list;
35	torben	352	}
36
37			@Override
38	torben	699	public boolean lookupTimetable(String type, String trainID) {
39	torben	391	boolean success;
40
41	torben	699	String trainNumber = extractTrainNumber(trainID);
42
43			String key = type + "-" + trainID;
44			timetables = departureCache.get(key);
45	torben	391
46			if (timetables == null) {
47	torben	699	success = lookupTimetableWorker(type, trainNumber);
48	torben	391
49			if (success) {
50	torben	699	departureCache.put(key, timetables);
51	torben	391	}
52
53			} else {
54			Log.i("XmlTimetableProvider", "cache hit !!!");
55			success = true;
56			}
57
58			return success;
59			}
60
61
62	torben	699	public boolean lookupTimetableWorker(String type, String trainNumber) {
63	torben	352	boolean success = false;
64	torben	699	String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
65	torben	352	Log.i("url", url);
66			try {
67	torben	391	timetables = new ArrayList<TimetableBean>();
68	torben	352
69			String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1");
70
71
72			Document doc = XmlUtil.parseXML(xml);
73			Node rootNode = doc.getDocumentElement(); // stations
74			NodeList stationList = rootNode.getChildNodes();
75
76
77			for (int i=0; i<stationList.getLength(); i++) {
78			Node entryNode = stationList.item(i);
79
80			if (! entryNode.getNodeName().equals("entry"))
81			continue;
82
83			TimetableBean timetable = new TimetableBean();
84
85	torben	365	NodeList entries = entryNode.getChildNodes();
86
87			if (entryNode.hasAttributes() && entryNode.getAttributes().getNamedItem("current") != null) {
88			timetable.setCurrent( Boolean.parseBoolean(entryNode.getAttributes().getNamedItem("current").getNodeValue()));
89			} else {
90			timetable.setCurrent(false);
91			}
92
93	torben	352	for (int j=0; j<entries.getLength(); j++) {
94			Node current = entries.item(j);
95
96			String content = null;
97			if (current.getFirstChild() != null)
98			content = current.getFirstChild().getNodeValue(); //get the textNode - then get the text node's value
99
100			String nodeName = current.getNodeName();
101
102			if (nodeName.equals("station"))
103			timetable.setStation( content );
104
105			if (nodeName.equals("arrival"))
106			timetable.setArrival( content );
107
108			if (nodeName.equals("departure"))
109			timetable.setDeparture( content );
110
111	torben	365	/*if (nodeName.equals("current"))
112			timetable.setCurrent( Boolean.parseBoolean(content) );*/
113	torben	352
114			}
115			timetables.add(timetable);
116			}
117			success = true;
118
119
120			} catch (Exception e) {
121			Log.e("XmlStationProvider", "lookupStations: ", e);
122			}
123	torben	699
124	torben	352	return success;
125
126			}
127	torben	699
128			private String extractTrainNumber (String trainID) {
129	torben	352
130	torben	699	String parts[] = trainID.split(" ");
131			if (parts.length == 2) {
132			return parts[1];
133			} else {
134			return parts[0];
135			}
136			}
137
138	torben	352	}