traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;

import com.gargoylesoftware.htmlunit.ProxyConfig;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.DomNodeList;
import com.gargoylesoftware.htmlunit.html.HtmlElement;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

import dk.thoerup.traininfoservice.DBConnection;

public class DepartureFetcher {
        
        Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
                

        public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
                Connection conn = null;
                try 
                {
                        conn = DBConnection.getConnection();
                
                        String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID;
                        Statement stmt = conn.createStatement();
                        ResultSet rs = stmt.executeQuery(SQL);
                        
                        if (rs.next()) {
                                String code = rs.getString( 1 );
                                if (! rs.wasNull() ) {
                                        List<DepartureBean> list = lookupDepartures(code, "FJRN");
                                        departureList.addAll(list);
                                }
                                
                                code = rs.getString(2);
                                if (! rs.wasNull() ) {
                                        List<DepartureBean> list = lookupDepartures(code, "S2");
                                        departureList.addAll(list);     
                                }
                                Collections.sort( departureList );
                        
                        }
                        
                } finally {
                        if (conn != null && !conn.isClosed() ) {
                                conn.close();
                        }
                }
                
                return departureList;
        }
        
        public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
                
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
            final WebClient webClient = new WebClient();
            webClient.setTimeout(1000);
            webClient.setJavaScriptEnabled(false);
                            
            
            final HtmlPage page = webClient.getPage("http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode);
            
            HtmlElement table = page.getElementById("afgangtabel");
            
            if (table != null) {
                    DomNodeList<HtmlElement> tableRows =  table.getElementsByTagName("tr");
                    
                    for (HtmlElement currentRow : tableRows) {
                        String rowClass = currentRow.getAttribute("class");
                        if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
                                DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
        
                                DepartureBean departure = new DepartureBean();
                                
                                String time = fields.get(0).asText();
                                departure.setTime(time);
                                
                                int updated = extractUpdated( fields.get(1) );
                                departure.setUpdated(updated);
                                
                                String trainNumber = fields.get(2).asText();
                                if (trainNumber.trim().length() == 1)
                                        trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
                                departure.setTrainNumber(trainNumber);
                                
                                String destination = fields.get(3).asText();
                                departure.setDestination(destination);
                                
                                String origin = fields.get(4).asText();
                                departure.setOrigin(origin);
                                
                                String location = fields.get(5).asText();
                                departure.setLocation(location);
                                
                                String status = fields.get(6).asText();
                                departure.setStatus(status);
                                
                                String note = extractNote( fields.get(7) );
                                departure.setNote(note);
                                
                                departureList.add(departure);
                        }
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            
            return departureList;
        }
        
        private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif" 
                int updated = -1;
                
                DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
                String updatedStr = updatedImgs.get(0).getAttribute("src");
                
                if (updatedStr != null) {
                        for (int i=0; i<updatedStr.length(); i++) {
                                char c = updatedStr.charAt(i);
                                if ( Character.isDigit(c))  {
                                        updated = Character.digit(c, 10);
                                        break;
                                }
                        }
                }               
                return updated;
        }
        
        private String extractNote(HtmlElement noteTd) {
                String note = noteTd.asText().trim();
                
                List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
                if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
                        note = note.substring(0,note.length() -1 );

                return note;
        }
        
        private String extractTrainNumber(HtmlElement trainTd) {
                String number = "";
                HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
                String href = anchorElement.getAttribute("href");
                String argstring = href.substring( href.indexOf('?') + 1);
                
                String args[] = argstring.split("&");
                for (String arg : args) {
                        String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
                        
                        if (pair[0].equalsIgnoreCase("TogNr"))
                                number = pair[1];
                }
                
                
                
                return number;
        }
        
        //test
        public static void main(String args[]) throws Exception{
                DepartureFetcher f = new DepartureFetcher();
                List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
                for(DepartureBean d : deps) {
                        System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" + 
                                                d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote()   );
                }
                
                System.out.println("--------------------------");
        }
}
1	package dk.thoerup.traininfoservice.banedk;
2
3	import java.sql.Connection;
4	import java.sql.ResultSet;
5	import java.sql.Statement;
6	import java.util.ArrayList;
7	import java.util.Collections;
8	import java.util.List;
9	import java.util.logging.Logger;
10
11	import com.gargoylesoftware.htmlunit.ProxyConfig;
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
17	import dk.thoerup.traininfoservice.DBConnection;
18
19	public class DepartureFetcher {
20
21	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
22
23
24	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
25	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
26
27	Connection conn = null;
28	try
29	{
30	conn = DBConnection.getConnection();
31
32	String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID;
33	Statement stmt = conn.createStatement();
34	ResultSet rs = stmt.executeQuery(SQL);
35
36	if (rs.next()) {
37	String code = rs.getString( 1 );
38	if (! rs.wasNull() ) {
39	List<DepartureBean> list = lookupDepartures(code, "FJRN");
40	departureList.addAll(list);
41	}
42
43	code = rs.getString(2);
44	if (! rs.wasNull() ) {
45	List<DepartureBean> list = lookupDepartures(code, "S2");
46	departureList.addAll(list);
47	}
48	Collections.sort( departureList );
49
50	}
51
52	} finally {
53	if (conn != null && !conn.isClosed() ) {
54	conn.close();
55	}
56	}
57
58	return departureList;
59	}
60
61	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
62
63	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
64
65	final WebClient webClient = new WebClient();
66	webClient.setTimeout(1000);
67	webClient.setJavaScriptEnabled(false);
68
69
70	final HtmlPage page = webClient.getPage("http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode);
71
72	HtmlElement table = page.getElementById("afgangtabel");
73
74	if (table != null) {
75	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
76
77	for (HtmlElement currentRow : tableRows) {
78	String rowClass = currentRow.getAttribute("class");
79	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
80	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
81
82	DepartureBean departure = new DepartureBean();
83
84	String time = fields.get(0).asText();
85	departure.setTime(time);
86
87	int updated = extractUpdated( fields.get(1) );
88	departure.setUpdated(updated);
89
90	String trainNumber = fields.get(2).asText();
91	if (trainNumber.trim().length() == 1)
92	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
93	departure.setTrainNumber(trainNumber);
94
95	String destination = fields.get(3).asText();
96	departure.setDestination(destination);
97
98	String origin = fields.get(4).asText();
99	departure.setOrigin(origin);
100
101	String location = fields.get(5).asText();
102	departure.setLocation(location);
103
104	String status = fields.get(6).asText();
105	departure.setStatus(status);
106
107	String note = extractNote( fields.get(7) );
108	departure.setNote(note);
109
110	departureList.add(departure);
111	}
112	}
113	} else {
114	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
115	}
116
117	return departureList;
118	}
119
120	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
121	int updated = -1;
122
123	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
124	String updatedStr = updatedImgs.get(0).getAttribute("src");
125
126	if (updatedStr != null) {
127	for (int i=0; i<updatedStr.length(); i++) {
128	char c = updatedStr.charAt(i);
129	if ( Character.isDigit(c)) {
130	updated = Character.digit(c, 10);
131	break;
132	}
133	}
134	}
135	return updated;
136	}
137
138	private String extractNote(HtmlElement noteTd) {
139	String note = noteTd.asText().trim();
140
141	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
142	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
143	note = note.substring(0,note.length() -1 );
144
145	return note;
146	}
147
148	private String extractTrainNumber(HtmlElement trainTd) {
149	String number = "";
150	HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
151	String href = anchorElement.getAttribute("href");
152	String argstring = href.substring( href.indexOf('?') + 1);
153
154	String args[] = argstring.split("&");
155	for (String arg : args) {
156	String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
157
158	if (pair[0].equalsIgnoreCase("TogNr"))
159	number = pair[1];
160	}
161
162
163
164	return number;
165	}
166
167	//test
168	public static void main(String args[]) throws Exception{
169	DepartureFetcher f = new DepartureFetcher();
170	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
171	for(DepartureBean d : deps) {
172	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
173	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
174	}
175
176	System.out.println("--------------------------");
177	}
178	}