thoerup/traininfoservice/LocateStations.java

package dk.thoerup.traininfoservice;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

import dk.thoerup.android.traininfo.common.StationBean;

/**
 * Servlet implementation class LocateStations
 */
@WebServlet(urlPatterns={"/LocateStations"})
public class LocateStations extends HttpServlet {
        private static final long serialVersionUID = 1L;

        Logger logger = Logger.getLogger( LocateStations.class.toString() );

        StationDAO stationDao = new StationDAO();


        protected String transformToIntList(String input) {             
                String strings[] = input.split(",");

                StringBuffer sb = new StringBuffer();
                sb.append("(");
                for (int i = 0; i<strings.length; i++) {
                        if (i>0) {
                                sb.append(",");
                        }
                        sb.append( Integer.parseInt(strings[i])); //by doing the integer conversion we ensure that it really is a integer
                }
                sb.append(")");
                return sb.toString();           
        }


        protected StationBean getStations(HttpServletRequest req) throws SQLException {
                StationBean stations = null;
                if (req.getParameter("latitude") != null && req.getParameter("latitude") != null) {
                        
                        Statistics.getInstance().incrementStationLookupsLocation();
                        
                        double latitude = Double.parseDouble( req.getParameter("latitude") );
                        double longitude = Double.parseDouble( req.getParameter("longitude") );
                        stations = stationDao.getByLocation(latitude, longitude);

                } else if (req.getParameter("name") != null) {
                        Statistics.getInstance().incrementStationLookupsName();
                        String name = req.getParameter("name").trim();
                        stations = stationDao.getByName(name);

                } else if (req.getParameter("list") != null) {
                        Statistics.getInstance().incrementStationLookupsFavorites();
                        String list = transformToIntList( req.getParameter("list"));
                        stations = stationDao.getByList(list);
                } else if (req.getParameter("dump") != null) {
                        stations = stationDao.dumpAll();
                }
                return stations;
        }


        protected String formatStations(StationBean stations) throws ServletException {

                Serializer serializer = new Persister();

                ByteArrayOutputStream out = new ByteArrayOutputStream();

                try {
                        serializer.write(stations, out);
                } catch (Exception e) {
                        throw new ServletException(e);
                }
                
                return out.toString();
        }

        @Override
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {


                try {
                        StationBean stations = getStations(request);


                        if (stations != null){
                                String xml = formatStations(stations);

                                response.setContentType("text/xml");
                                response.getWriter().print(xml);
                        } else {
                                response.sendError(400, "not enough parameters");               
                        }


                } catch (Exception e) {                         
                        logger.log(Level.SEVERE, "Exception while finding stations", e);
                        response.sendError(500);                                                
                } 
        }

}
1	torben	292	package dk.thoerup.traininfoservice;
2
3	torben	1060	import java.io.ByteArrayOutputStream;
4	torben	292	import java.io.IOException;
5			import java.sql.SQLException;
6	torben	348	import java.util.logging.Level;
7			import java.util.logging.Logger;
8	torben	292
9			import javax.servlet.ServletException;
10	torben	958	import javax.servlet.annotation.WebServlet;
11	torben	292	import javax.servlet.http.HttpServlet;
12			import javax.servlet.http.HttpServletRequest;
13			import javax.servlet.http.HttpServletResponse;
14
15	torben	1060	import org.simpleframework.xml.Serializer;
16			import org.simpleframework.xml.core.Persister;
17
18	torben	1061	import dk.thoerup.android.traininfo.common.StationBean;
19
20	torben	292	/**
21			* Servlet implementation class LocateStations
22			*/
23	torben	958	@WebServlet(urlPatterns={"/LocateStations"})
24	torben	292	public class LocateStations extends HttpServlet {
25			private static final long serialVersionUID = 1L;
26
27	torben	348	Logger logger = Logger.getLogger( LocateStations.class.toString() );
28	torben	431
29	torben	588	StationDAO stationDao = new StationDAO();
30	torben	431
31	torben	588
32	torben	431	protected String transformToIntList(String input) {
33			String strings[] = input.split(",");
34	torben	588
35	torben	431	StringBuffer sb = new StringBuffer();
36			sb.append("(");
37			for (int i = 0; i<strings.length; i++) {
38			if (i>0) {
39			sb.append(",");
40			}
41			sb.append( Integer.parseInt(strings[i])); //by doing the integer conversion we ensure that it really is a integer
42			}
43			sb.append(")");
44			return sb.toString();
45	torben	347	}
46	torben	322
47	torben	431
48	torben	1060	protected StationBean getStations(HttpServletRequest req) throws SQLException {
49			StationBean stations = null;
50	torben	431	if (req.getParameter("latitude") != null && req.getParameter("latitude") != null) {
51	torben	711
52			Statistics.getInstance().incrementStationLookupsLocation();
53
54	torben	431	double latitude = Double.parseDouble( req.getParameter("latitude") );
55			double longitude = Double.parseDouble( req.getParameter("longitude") );
56	torben	588	stations = stationDao.getByLocation(latitude, longitude);
57
58	torben	431	} else if (req.getParameter("name") != null) {
59	torben	711	Statistics.getInstance().incrementStationLookupsName();
60	torben	588	String name = req.getParameter("name").trim();
61			stations = stationDao.getByName(name);
62	torben	431
63			} else if (req.getParameter("list") != null) {
64	torben	711	Statistics.getInstance().incrementStationLookupsFavorites();
65	torben	431	String list = transformToIntList( req.getParameter("list"));
66	torben	588	stations = stationDao.getByList(list);
67	torben	1082	} else if (req.getParameter("dump") != null) {
68			stations = stationDao.dumpAll();
69	torben	588	}
70			return stations;
71	torben	347	}
72
73
74	torben	1060	protected String formatStations(StationBean stations) throws ServletException {
75	torben	347
76	torben	1060	Serializer serializer = new Persister();
77	torben	347
78	torben	1060	ByteArrayOutputStream out = new ByteArrayOutputStream();
79	torben	431
80	torben	1060	try {
81			serializer.write(stations, out);
82			} catch (Exception e) {
83			throw new ServletException(e);
84			}
85
86			return out.toString();
87	torben	292	}
88
89	torben	425	@Override
90	torben	292	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
91	torben	347
92	torben	588
93	torben	431	try {
94	torben	1060	StationBean stations = getStations(request);
95	torben	347
96
97	torben	588	if (stations != null){
98			String xml = formatStations(stations);
99
100	torben	431	response.setContentType("text/xml");
101			response.getWriter().print(xml);
102			} else {
103			response.sendError(400, "not enough parameters");
104			}
105	torben	347
106
107	torben	431	} catch (Exception e) {
108			logger.log(Level.SEVERE, "Exception while finding stations", e);
109			response.sendError(500);
110	torben	588	}
111	torben	292	}
112
113			}