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	torben	305	package dk.thoerup.traininfoservice.banedk;
2
3	torben	307	import java.sql.Connection;
4			import java.sql.ResultSet;
5			import java.sql.Statement;
6	torben	305	import java.util.ArrayList;
7	torben	307	import java.util.Collections;
8	torben	305	import java.util.List;
9
10	torben	313	import com.gargoylesoftware.htmlunit.ProxyConfig;
11	torben	305	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	torben	307	import dk.thoerup.traininfoservice.DBConnection;
17
18	torben	305	public class DepartureFetcher {
19	torben	307
20	torben	308
21	torben	307	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	torben	305	}
57
58	torben	307	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
59	torben	305
60			List<DepartureBean> departureList = new ArrayList<DepartureBean>();
61
62			final WebClient webClient = new WebClient();
63			webClient.setTimeout(1000);
64	torben	313	webClient.setJavaScriptEnabled(false);
65
66	torben	305
67	torben	307	final HtmlPage page = webClient.getPage("http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode);
68	torben	305
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	torben	313	String note = extractNote( fields.get(7) );
101	torben	305	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	torben	313	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	torben	305	//test
139			public static void main(String args[]) throws Exception{
140			DepartureFetcher f = new DepartureFetcher();
141	torben	307	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
142	torben	305	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			}