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;
                
                boolean dummy = req.getParameter("dummy") != null;
                if (dummy == true)
                        stations = new StationBean();
                
                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") );
                        if (dummy == false)
                                stations = stationDao.getByLocation(latitude, longitude);

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

                } else if (req.getParameter("list") != null) {
                        Statistics.getInstance().incrementStationLookupsFavorites();
                        String list = transformToIntList( req.getParameter("list"));
                        if (dummy == false)
                                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	package dk.thoerup.traininfoservice;
2
3
4	import java.io.IOException;
5	import java.io.StringWriter;
6	import java.sql.SQLException;
7	import java.util.logging.Level;
8	import java.util.logging.Logger;
9
10	import javax.servlet.ServletException;
11	import javax.servlet.annotation.WebServlet;
12	import javax.servlet.http.HttpServlet;
13	import javax.servlet.http.HttpServletRequest;
14	import javax.servlet.http.HttpServletResponse;
15
16	import org.simpleframework.xml.Serializer;
17	import org.simpleframework.xml.core.Persister;
18
19	import dk.thoerup.android.traininfo.common.StationBean;
20	import dk.thoerup.traininfoservice.db.StationDAO;
21
22	/**
23	* Servlet implementation class LocateStations
24	*/
25	@WebServlet(urlPatterns={"/LocateStations"})
26	public class LocateStations extends HttpServlet {
27	private static final long serialVersionUID = 1L;
28
29	Logger logger = Logger.getLogger( LocateStations.class.toString() );
30
31	StationDAO stationDao = new StationDAO();
32
33
34	protected String transformToIntList(String input) {
35	String strings[] = input.split(",");
36
37	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	}
48
49
50	protected StationBean getStations(HttpServletRequest req) throws SQLException {
51	StationBean stations = null;
52
53	boolean dummy = req.getParameter("dummy") != null;
54	if (dummy == true)
55	stations = new StationBean();
56
57	if (req.getParameter("latitude") != null && req.getParameter("latitude") != null) {
58
59	Statistics.getInstance().incrementStationLookupsLocation();
60
61	double latitude = Double.parseDouble( req.getParameter("latitude") );
62	double longitude = Double.parseDouble( req.getParameter("longitude") );
63	if (dummy == false)
64	stations = stationDao.getByLocation(latitude, longitude);
65
66	} else if (req.getParameter("name") != null) {
67	Statistics.getInstance().incrementStationLookupsName();
68	String name = req.getParameter("name").trim();
69	if (dummy == false)
70	stations = stationDao.getByName(name);
71
72	} else if (req.getParameter("list") != null) {
73	Statistics.getInstance().incrementStationLookupsFavorites();
74	String list = transformToIntList( req.getParameter("list"));
75	if (dummy == false)
76	stations = stationDao.getByList(list);
77	} else if (req.getParameter("dump") != null) {
78	stations = stationDao.dumpAll();
79	}
80	return stations;
81	}
82
83
84	protected String formatStations(StationBean stations) throws ServletException {
85
86	Serializer serializer = new Persister();
87
88	StringWriter out = new StringWriter();
89
90	try {
91	serializer.write(stations, out);
92	} catch (Exception e) {
93	throw new ServletException(e);
94	}
95
96	return out.toString();
97	}
98
99	@Override
100	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
101
102
103	try {
104	StationBean stations = getStations(request);
105
106
107	if (stations != null){
108	String xml = formatStations(stations);
109
110	response.setContentType("text/xml");
111	response.getWriter().print(xml);
112	} else {
113	response.sendError(400, "not enough parameters");
114	}
115
116
117	} catch (Exception e) {
118	logger.log(Level.SEVERE, "Exception while finding stations", e);
119	response.sendError(500);
120	}
121	}
122
123	}