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 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 {
                

        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");
            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();
                        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);
                }
            }
            
            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;
        }
        
        //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
10	import com.gargoylesoftware.htmlunit.ProxyConfig;
11	import com.gargoylesoftware.htmlunit.WebClient;
12	import com.gargoylesoftware.htmlunit.html.DomNodeList;
13	import com.gargoylesoftware.htmlunit.html.HtmlElement;
14	import com.gargoylesoftware.htmlunit.html.HtmlPage;
15
16	import dk.thoerup.traininfoservice.DBConnection;
17
18	public class DepartureFetcher {
19
20
21	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
22	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
23
24	Connection conn = null;
25	try
26	{
27	conn = DBConnection.getConnection();
28
29	String SQL = "SELECT stationcode_fjrn, stationcode_stog FROM trainstations WHERE id=" + stationID;
30	Statement stmt = conn.createStatement();
31	ResultSet rs = stmt.executeQuery(SQL);
32
33	if (rs.next()) {
34	String code = rs.getString( 1 );
35	if (! rs.wasNull() ) {
36	List<DepartureBean> list = lookupDepartures(code, "FJRN");
37	departureList.addAll(list);
38	}
39
40	code = rs.getString(2);
41	if (! rs.wasNull() ) {
42	List<DepartureBean> list = lookupDepartures(code, "S2");
43	departureList.addAll(list);
44	}
45	Collections.sort( departureList );
46
47	}
48
49	} finally {
50	if (conn != null && !conn.isClosed() ) {
51	conn.close();
52	}
53	}
54
55	return departureList;
56	}
57
58	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
59
60	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
61
62	final WebClient webClient = new WebClient();
63	webClient.setTimeout(1000);
64	webClient.setJavaScriptEnabled(false);
65
66
67	final HtmlPage page = webClient.getPage("http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode);
68
69	HtmlElement table = page.getElementById("afgangtabel");
70	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
71
72	for (HtmlElement currentRow : tableRows) {
73	String rowClass = currentRow.getAttribute("class");
74	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
75	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
76
77	DepartureBean departure = new DepartureBean();
78
79	String time = fields.get(0).asText();
80	departure.setTime(time);
81
82	int updated = extractUpdated( fields.get(1) );
83	departure.setUpdated(updated);
84
85	String trainNumber = fields.get(2).asText();
86	departure.setTrainNumber(trainNumber);
87
88	String destination = fields.get(3).asText();
89	departure.setDestination(destination);
90
91	String origin = fields.get(4).asText();
92	departure.setOrigin(origin);
93
94	String location = fields.get(5).asText();
95	departure.setLocation(location);
96
97	String status = fields.get(6).asText();
98	departure.setStatus(status);
99
100	String note = extractNote( fields.get(7) );
101	departure.setNote(note);
102
103	departureList.add(departure);
104	}
105	}
106
107	return departureList;
108	}
109
110	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
111	int updated = -1;
112
113	DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
114	String updatedStr = updatedImgs.get(0).getAttribute("src");
115
116	if (updatedStr != null) {
117	for (int i=0; i<updatedStr.length(); i++) {
118	char c = updatedStr.charAt(i);
119	if ( Character.isDigit(c)) {
120	updated = Character.digit(c, 10);
121	break;
122	}
123	}
124	}
125	return updated;
126	}
127
128	private String extractNote(HtmlElement noteTd) {
129	String note = noteTd.asText().trim();
130
131	List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
132	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
133	note = note.substring(0,note.length() -1 );
134
135	return note;
136	}
137
138	//test
139	public static void main(String args[]) throws Exception{
140	DepartureFetcher f = new DepartureFetcher();
141	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
142	for(DepartureBean d : deps) {
143	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
144	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
145	}
146
147	System.out.println("--------------------------");
148	}
149	}