thoerup/traininfoservice/LocateStations.java

package dk.thoerup.traininfoservice;


import java.io.IOException;
import java.io.StringWriter;
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;
import dk.thoerup.traininfoservice.db.StationDAO;

/**
 * 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();

                StringWriter out = new StringWriter();

                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	1190
4	torben	292	import java.io.IOException;
5	torben	1190	import java.io.StringWriter;
6	torben	292	import java.sql.SQLException;
7	torben	348	import java.util.logging.Level;
8			import java.util.logging.Logger;
9	torben	292
10			import javax.servlet.ServletException;
11	torben	958	import javax.servlet.annotation.WebServlet;
12	torben	292	import javax.servlet.http.HttpServlet;
13			import javax.servlet.http.HttpServletRequest;
14			import javax.servlet.http.HttpServletResponse;
15
16	torben	1060	import org.simpleframework.xml.Serializer;
17			import org.simpleframework.xml.core.Persister;
18
19	torben	1061	import dk.thoerup.android.traininfo.common.StationBean;
20	torben	1255	import dk.thoerup.traininfoservice.db.StationDAO;
21	torben	1061
22	torben	292	/**
23			* Servlet implementation class LocateStations
24			*/
25	torben	958	@WebServlet(urlPatterns={"/LocateStations"})
26	torben	292	public class LocateStations extends HttpServlet {
27			private static final long serialVersionUID = 1L;
28
29	torben	348	Logger logger = Logger.getLogger( LocateStations.class.toString() );
30	torben	431
31	torben	588	StationDAO stationDao = new StationDAO();
32	torben	431
33	torben	588
34	torben	431	protected String transformToIntList(String input) {
35			String strings[] = input.split(",");
36	torben	588
37	torben	431	StringBuffer sb = new StringBuffer();
38			sb.append("(");
39			for (int i = 0; i<strings.length; i++) {
40			if (i>0) {
41			sb.append(",");
42			}
43			sb.append( Integer.parseInt(strings[i])); //by doing the integer conversion we ensure that it really is a integer
44			}
45			sb.append(")");
46			return sb.toString();
47	torben	347	}
48	torben	322
49	torben	431
50	torben	1060	protected StationBean getStations(HttpServletRequest req) throws SQLException {
51			StationBean stations = null;
52	torben	431	if (req.getParameter("latitude") != null && req.getParameter("latitude") != null) {
53	torben	711
54			Statistics.getInstance().incrementStationLookupsLocation();
55
56	torben	431	double latitude = Double.parseDouble( req.getParameter("latitude") );
57			double longitude = Double.parseDouble( req.getParameter("longitude") );
58	torben	588	stations = stationDao.getByLocation(latitude, longitude);
59
60	torben	431	} else if (req.getParameter("name") != null) {
61	torben	711	Statistics.getInstance().incrementStationLookupsName();
62	torben	588	String name = req.getParameter("name").trim();
63			stations = stationDao.getByName(name);
64	torben	431
65			} else if (req.getParameter("list") != null) {
66	torben	711	Statistics.getInstance().incrementStationLookupsFavorites();
67	torben	431	String list = transformToIntList( req.getParameter("list"));
68	torben	588	stations = stationDao.getByList(list);
69	torben	1082	} else if (req.getParameter("dump") != null) {
70			stations = stationDao.dumpAll();
71	torben	588	}
72			return stations;
73	torben	347	}
74
75
76	torben	1060	protected String formatStations(StationBean stations) throws ServletException {
77	torben	347
78	torben	1060	Serializer serializer = new Persister();
79	torben	347
80	torben	1190	StringWriter out = new StringWriter();
81	torben	431
82	torben	1060	try {
83			serializer.write(stations, out);
84			} catch (Exception e) {
85			throw new ServletException(e);
86			}
87
88			return out.toString();
89	torben	292	}
90
91	torben	425	@Override
92	torben	292	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
93	torben	347
94	torben	588
95	torben	431	try {
96	torben	1060	StationBean stations = getStations(request);
97	torben	347
98
99	torben	588	if (stations != null){
100			String xml = formatStations(stations);
101
102	torben	431	response.setContentType("text/xml");
103			response.getWriter().print(xml);
104			} else {
105			response.sendError(400, "not enough parameters");
106			}
107	torben	347
108
109	torben	431	} catch (Exception e) {
110			logger.log(Level.SEVERE, "Exception while finding stations", e);
111			response.sendError(500);
112	torben	588	}
113	torben	292	}
114
115			}