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("stationid"))
                                                timetable.setStationId( Integer.parseInt(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	package dk.thoerup.traininfo.provider;
2
3	import java.util.ArrayList;
4	import java.util.List;
5
6	import org.w3c.dom.Document;
7
8	import org.w3c.dom.Node;
9	import org.w3c.dom.NodeList;
10
11	import android.util.Log;
12	import dk.thoerup.traininfo.TimetableBean;
13	import dk.thoerup.traininfo.util.AndroidTimeoutCache;
14	import dk.thoerup.traininfo.util.DownloadUtil;
15	import dk.thoerup.traininfo.util.XmlUtil;
16
17	public class XmlTimetableProvider implements TimetableProvider {
18
19	final static int CACHE_TIMEOUT = 60*1000;
20
21	List<TimetableBean> timetables;
22
23	AndroidTimeoutCache<String,List<TimetableBean>> departureCache = new AndroidTimeoutCache<String,List<TimetableBean>>(CACHE_TIMEOUT);
24
25	@Override
26	public List<TimetableBean> getTimetable(String type, String trainID) {
27	String key = type + "-" + trainID;
28	List<TimetableBean> list = departureCache.get(key);
29
30	if (list == null) {
31	list = new ArrayList<TimetableBean>();
32	}
33
34	return list;
35	}
36
37	@Override
38	public boolean lookupTimetable(String type, String trainID) {
39	boolean success;
40
41	String trainNumber = extractTrainNumber(trainID);
42
43	String key = type + "-" + trainID;
44	timetables = departureCache.get(key);
45
46	if (timetables == null) {
47	success = lookupTimetableWorker(type, trainNumber);
48
49	if (success) {
50	departureCache.put(key, timetables);
51	}
52
53	} else {
54	Log.i("XmlTimetableProvider", "cache hit !!!");
55	success = true;
56	}
57
58	return success;
59	}
60
61
62	public boolean lookupTimetableWorker(String type, String trainNumber) {
63	boolean success = false;
64	String url = XmlUtil.SERVICE_BASE + "/TimetableServlet?train=" + trainNumber + "&type=" + type;
65	Log.i("url", url);
66	try {
67	timetables = new ArrayList<TimetableBean>();
68
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	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	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	if (nodeName.equals("stationid"))
112	timetable.setStationId( Integer.parseInt(content));
113
114	/*if (nodeName.equals("current"))
115	timetable.setCurrent( Boolean.parseBoolean(content) );*/
116
117	}
118	timetables.add(timetable);
119	}
120	success = true;
121
122
123	} catch (Exception e) {
124	Log.e("XmlStationProvider", "lookupStations: ", e);
125	}
126
127	return success;
128
129	}
130
131	private String extractTrainNumber (String trainID) {
132
133	String parts[] = trainID.split(" ");
134	if (parts.length == 2) {
135	return parts[1];
136	} else {
137	return parts[0];
138	}
139	}
140
141	}