thoerup/traininfoservice/LocateStations.java

package dk.thoerup.traininfoservice;

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

import javax.jdo.PersistenceManager;
import javax.jdo.Query;
import javax.servlet.ServletException;
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.jdo.JdoStationBean;
import dk.thoerup.traininfoservice.jdo.PMF;

/**
 * Servlet implementation class 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);
                }
                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();
        }

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

                if (true) {
                        PersistenceManager pm = null;
                        try {
                                pm = PMF.get().getPersistenceManager();
                                
                                
                                JdoStationBean b = new JdoStationBean();
                                b.setId(1000);
                                b.setName("TestStation");
                                b.setNameLower( b.getName().toLowerCase() );
                                b.setMetro("12");
                                pm.makePersistent(b);
        
                                        
                                JdoStationBean b2 = new JdoStationBean();
                                b2.setId(1001);
                                b2.setName("teststation 2");
                                b2.setNameLower( b2.getName().toLowerCase() );
                                b2.setMetro("12");
                                pm.makePersistent(b2);
                                
                                JdoStationBean b3 = new JdoStationBean();
                                b3.setId(1002);
                                b3.setName("Horsens");
                                b3.setNameLower( b3.getName().toLowerCase() );
                                b3.setMetro("13");
                                pm.makePersistent(b3);


                                //String query = "select from " + JdoStationBean.class.getName();// + " where nameLower.startsWith('test')";
                                
                                String query = "select from " + JdoStationBean.class.getName() + " where (id == 1001 || id == 1002) ";
                                
                                List<JdoStationBean> stations = (List<JdoStationBean>) pm.newQuery( query ).execute();                                                          
                                
                                logger.info("size=" + stations.size() );
                                for(JdoStationBean bean : stations) {
                                        logger.info("Station: " + bean.getId() + "/" + bean.getName());
                                }
                                
                                
                        } finally {
                                if (pm != null) 
                                        pm.close();
                        }
                        
                        
                        return;
                }

                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	import java.io.ByteArrayOutputStream;
4	import java.io.IOException;
5	import java.sql.SQLException;
6	import java.util.List;
7	import java.util.logging.Level;
8	import java.util.logging.Logger;
9
10	import javax.jdo.PersistenceManager;
11	import javax.jdo.Query;
12	import javax.servlet.ServletException;
13	import javax.servlet.http.HttpServlet;
14	import javax.servlet.http.HttpServletRequest;
15	import javax.servlet.http.HttpServletResponse;
16
17	import org.simpleframework.xml.Serializer;
18	import org.simpleframework.xml.core.Persister;
19
20	import dk.thoerup.android.traininfo.common.StationBean;
21	import dk.thoerup.traininfoservice.jdo.JdoStationBean;
22	import dk.thoerup.traininfoservice.jdo.PMF;
23
24	/**
25	* Servlet implementation class LocateStations
26	*/
27
28	public class LocateStations extends HttpServlet {
29	private static final long serialVersionUID = 1L;
30
31	Logger logger = Logger.getLogger( LocateStations.class.toString() );
32
33	StationDAO stationDao = new StationDAO();
34
35
36	protected String transformToIntList(String input) {
37	String strings[] = input.split(",");
38
39	StringBuffer sb = new StringBuffer();
40	sb.append("(");
41	for (int i = 0; i<strings.length; i++) {
42	if (i>0) {
43	sb.append(",");
44	}
45	sb.append( Integer.parseInt(strings[i])); //by doing the integer conversion we ensure that it really is a integer
46	}
47	sb.append(")");
48	return sb.toString();
49	}
50
51
52	protected StationBean getStations(HttpServletRequest req) throws SQLException {
53	StationBean stations = null;
54	if (req.getParameter("latitude") != null && req.getParameter("latitude") != null) {
55
56	Statistics.getInstance().incrementStationLookupsLocation();
57
58	double latitude = Double.parseDouble( req.getParameter("latitude") );
59	double longitude = Double.parseDouble( req.getParameter("longitude") );
60	stations = stationDao.getByLocation(latitude, longitude);
61
62	} else if (req.getParameter("name") != null) {
63	Statistics.getInstance().incrementStationLookupsName();
64	String name = req.getParameter("name").trim();
65	stations = stationDao.getByName(name);
66
67	} else if (req.getParameter("list") != null) {
68	Statistics.getInstance().incrementStationLookupsFavorites();
69	String list = transformToIntList( req.getParameter("list"));
70	stations = stationDao.getByList(list);
71	}
72	return stations;
73	}
74
75
76	protected String formatStations(StationBean stations) throws ServletException {
77
78	Serializer serializer = new Persister();
79
80	ByteArrayOutputStream out = new ByteArrayOutputStream();
81
82	try {
83	serializer.write(stations, out);
84	} catch (Exception e) {
85	throw new ServletException(e);
86	}
87
88	return out.toString();
89	}
90
91	@SuppressWarnings("unchecked")
92	@Override
93	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
94
95	if (true) {
96	PersistenceManager pm = null;
97	try {
98	pm = PMF.get().getPersistenceManager();
99
100
101
102
103	JdoStationBean b = new JdoStationBean();
104	b.setId(1000);
105	b.setName("TestStation");
106	b.setNameLower( b.getName().toLowerCase() );
107	b.setMetro("12");
108	pm.makePersistent(b);
109
110
111	JdoStationBean b2 = new JdoStationBean();
112	b2.setId(1001);
113	b2.setName("teststation 2");
114	b2.setNameLower( b2.getName().toLowerCase() );
115	b2.setMetro("12");
116	pm.makePersistent(b2);
117
118	JdoStationBean b3 = new JdoStationBean();
119	b3.setId(1002);
120	b3.setName("Horsens");
121	b3.setNameLower( b3.getName().toLowerCase() );
122	b3.setMetro("13");
123	pm.makePersistent(b3);
124
125
126
127
128	//String query = "select from " + JdoStationBean.class.getName();// + " where nameLower.startsWith('test')";
129
130	String query = "select from " + JdoStationBean.class.getName() + " where (id == 1001 \|\| id == 1002) ";
131
132	List<JdoStationBean> stations = (List<JdoStationBean>) pm.newQuery( query ).execute();
133
134	logger.info("size=" + stations.size() );
135	for(JdoStationBean bean : stations) {
136	logger.info("Station: " + bean.getId() + "/" + bean.getName());
137	}
138
139
140
141
142	} finally {
143	if (pm != null)
144	pm.close();
145	}
146
147
148	return;
149	}
150
151	try {
152	StationBean stations = getStations(request);
153
154
155	if (stations != null){
156	String xml = formatStations(stations);
157
158	response.setContentType("text/xml");
159	response.getWriter().print(xml);
160	} else {
161	response.sendError(400, "not enough parameters");
162	}
163
164
165	} catch (Exception e) {
166	logger.log(Level.SEVERE, "Exception while finding stations", e);
167	response.sendError(500);
168	}
169	}
170
171	}