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");
            
            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();
                                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
71	torben	342	if (table != null) {
72			DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
73
74			for (HtmlElement currentRow : tableRows) {
75			String rowClass = currentRow.getAttribute("class");
76			if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
77			DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
78
79			DepartureBean departure = new DepartureBean();
80
81			String time = fields.get(0).asText();
82			departure.setTime(time);
83
84			int updated = extractUpdated( fields.get(1) );
85			departure.setUpdated(updated);
86
87			String trainNumber = fields.get(2).asText();
88			departure.setTrainNumber(trainNumber);
89
90			String destination = fields.get(3).asText();
91			departure.setDestination(destination);
92
93			String origin = fields.get(4).asText();
94			departure.setOrigin(origin);
95
96			String location = fields.get(5).asText();
97			departure.setLocation(location);
98
99			String status = fields.get(6).asText();
100			departure.setStatus(status);
101
102			String note = extractNote( fields.get(7) );
103			departure.setNote(note);
104
105			departureList.add(departure);
106			}
107			}
108	torben	305	}
109			return departureList;
110			}
111
112			private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
113			int updated = -1;
114
115			DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
116			String updatedStr = updatedImgs.get(0).getAttribute("src");
117
118			if (updatedStr != null) {
119			for (int i=0; i<updatedStr.length(); i++) {
120			char c = updatedStr.charAt(i);
121			if ( Character.isDigit(c)) {
122			updated = Character.digit(c, 10);
123			break;
124			}
125			}
126			}
127			return updated;
128			}
129
130	torben	313	private String extractNote(HtmlElement noteTd) {
131			String note = noteTd.asText().trim();
132
133			List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
134			if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
135			note = note.substring(0,note.length() -1 );
136
137			return note;
138			}
139
140	torben	305	//test
141			public static void main(String args[]) throws Exception{
142			DepartureFetcher f = new DepartureFetcher();
143	torben	307	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
144	torben	305	for(DepartureBean d : deps) {
145			System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
146			d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
147			}
148
149			System.out.println("--------------------------");
150			}
151			}