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