traininfoservice/banedk/TimetableFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.RefreshHandler;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.DomNodeList;
import com.gargoylesoftware.htmlunit.html.HtmlElement;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class TimetableFetcher {
        
        class NullRefreshHandler implements RefreshHandler {
                public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {                   
                }
                
        }
                
        TimeoutCache<String, List<TimetableBean>> cache = new TimeoutCache<String,List<TimetableBean>>(120 * 1000);
        
        
        Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
        
        
        List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
                String key = trainID+type;
                List<TimetableBean> list = cache.get(key);
                
                if (list == null) {
                        list = lookupTimetable(trainID,type);
                        cache.put(key, list);
                } else {
                        logger.info("Timetable: Cache hit " + trainID); 
                }
                return list;
        }

        List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {             
                List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
                
                String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
                                

            final WebClient webClient = new WebClient();
            webClient.setTimeout(2500);
            webClient.setJavaScriptEnabled(false);         
            webClient.setRefreshHandler( new NullRefreshHandler() );
            webClient.setCssEnabled(false);
            
            
            final HtmlPage page = webClient.getPage(url);
            
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
            if (tables.size() == 1) {
                HtmlElement timetable = tables.get(0);
                DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        HtmlElement row = rows.get(i);
                        DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
                        
                        if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableBean bean = new TimetableBean();
                        bean.setStation( fields.get(0).asText() );
                        bean.setArrival( fields.get(1).asText() );
                        bean.setDeparture( fields.get(2).asText() );
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                bean.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        timetableList.add(bean);

                }
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
                
                return timetableList;
        }
        
}
1	torben	350	package dk.thoerup.traininfoservice.banedk;
2
3
4			import java.io.IOException;
5			import java.net.URL;
6			import java.util.ArrayList;
7			import java.util.List;
8			import java.util.logging.Logger;
9
10	torben	387	import com.gargoylesoftware.htmlunit.Page;
11			import com.gargoylesoftware.htmlunit.RefreshHandler;
12			import com.gargoylesoftware.htmlunit.WebClient;
13			import com.gargoylesoftware.htmlunit.html.DomNodeList;
14			import com.gargoylesoftware.htmlunit.html.HtmlElement;
15			import com.gargoylesoftware.htmlunit.html.HtmlPage;
16	torben	350
17			public class TimetableFetcher {
18
19			class NullRefreshHandler implements RefreshHandler {
20			public void handleRefresh(Page arg0, URL arg1, int arg2) throws IOException {
21			}
22
23			}
24	torben	387
25			TimeoutCache<String, List<TimetableBean>> cache = new TimeoutCache<String,List<TimetableBean>>(120 * 1000);
26	torben	350
27	torben	387
28	torben	350	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
29	torben	387
30
31			List<TimetableBean> cachedLookupTimetable(String trainID, String type) throws Exception {
32			String key = trainID+type;
33			List<TimetableBean> list = cache.get(key);
34
35			if (list == null) {
36			list = lookupTimetable(trainID,type);
37			cache.put(key, list);
38			} else {
39	torben	389	logger.info("Timetable: Cache hit " + trainID);
40	torben	387	}
41			return list;
42			}
43	torben	350
44	torben	387	List<TimetableBean> lookupTimetable(String trainID, String type) throws Exception {
45	torben	350	List<TimetableBean> timetableList = new ArrayList<TimetableBean>();
46
47			String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
48
49
50			final WebClient webClient = new WebClient();
51	torben	386	webClient.setTimeout(2500);
52	torben	350	webClient.setJavaScriptEnabled(false);
53			webClient.setRefreshHandler( new NullRefreshHandler() );
54			webClient.setCssEnabled(false);
55
56
57			final HtmlPage page = webClient.getPage(url);
58
59
60			boolean currentStation = false;
61			boolean currentStationSaved = false;
62
63			List<HtmlElement> tables = page.getDocumentElement().getElementsByAttribute("table", "class", "Rute");
64			if (tables.size() == 1) {
65			HtmlElement timetable = tables.get(0);
66			DomNodeList<HtmlElement> rows = timetable.getElementsByTagName("tr");
67
68			for (int i=0; i<rows.size(); i++) {
69			if (i==0) //First row is column headers
70			continue;
71
72
73			HtmlElement row = rows.get(i);
74			DomNodeList<HtmlElement> fields = row.getElementsByTagName("td");
75
76			if (currentStationSaved == false && fields.get(0).getAttribute("class").equalsIgnoreCase("Tidsstreg")) {
77			currentStation = true;
78			continue;
79			}
80
81			TimetableBean bean = new TimetableBean();
82			bean.setStation( fields.get(0).asText() );
83			bean.setArrival( fields.get(1).asText() );
84			bean.setDeparture( fields.get(2).asText() );
85
86			if (currentStation == true && currentStationSaved == false ) {
87			bean.setCurrent(currentStation);
88			currentStationSaved = true;
89			}
90
91			timetableList.add(bean);
92
93			}
94
95			} else {
96			logger.warning("No time table found, trainID=" + trainID + " type=" + type);
97			}
98
99			return timetableList;
100			}
101
102			}