--- android/TrainInfoService/src/dk/thoerup/traininfoservice/LocateStations.java 2009/09/01 19:40:02 293
+++ android/TrainInfoServiceGoogle/src/dk/thoerup/traininfoservice/LocateStations.java 2010/09/20 20:11:55 1080
@@ -1,105 +1,156 @@
package dk.thoerup.traininfoservice;
+import java.io.ByteArrayOutputStream;
import java.io.IOException;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
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 dk.thoerup.traininfoservice.DBConnection;
+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;
-
- /**
- * @see HttpServlet#HttpServlet()
- */
- public LocateStations() {
- super();
- // TODO Auto-generated constructor stub
- }
-
- protected String getStations(Connection conn, double latitude, double longitude) throws SQLException {
- //inner select is workaround from not being able to use a calculated column directly in where clause
- final String SQL = "SELECT * FROM ( "+
- " SELECT name,latitude,longitude,stationcode, " +
- " earth_distance( ll_to_earth(latitude,longitude), ll_to_earth(?,?))::int AS calcdist " +
- " FROM trainstations " +
- " ) AS trainstations2 " +
- "ORDER BY calcdist ASC " +
- "LIMIT 4 ";
-
- System.out.println(SQL);
-
- PreparedStatement stmt = null;
- ResultSet res = null;
-
- StringBuffer buff = new StringBuffer();
-
- buff.append("\n");
- buff.append("\n");
- try
- {
- stmt = conn.prepareStatement(SQL);
- stmt.setDouble(1, latitude);
- stmt.setDouble(2, longitude);
-
- res = stmt.executeQuery();
-
- while (res.next()) {
- buff.append("\n");
- buff.append("").append( res.getString(1) ) .append("\n");
- buff.append("").append( res.getDouble(2) ) .append("\n");
- buff.append("").append( res.getDouble(3) ) .append("\n");
- buff.append("").append( res.getString(4) ) .append("\n");
- buff.append("").append( res.getInt(5) ) .append("\n");
-
- buff.append("\n");
+ 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; i0) {
+ sb.append(",");
}
- } finally {
- if (res != null && !res.isClosed())
- res.close();
- if (stmt != null && !stmt.isClosed())
- stmt.close();
+ sb.append( Integer.parseInt(strings[i])); //by doing the integer conversion we ensure that it really is a integer
}
- buff.append("\n");
- return buff.toString();
+ sb.append(")");
+ return sb.toString();
}
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-
- double latitude = Double.parseDouble( request.getParameter("latitude") );
- double longitude = Double.parseDouble( request.getParameter("longitude") );
-
- Connection conn = null;
+
+ 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 {
- conn = DBConnection.getConnection();
-
- String xml = getStations(conn, latitude, longitude);
-
- response.setContentType("text/xml");
- response.getWriter().print(xml);
-
- conn.close();
- conn = null;
-
+ serializer.write(stations, out);
} catch (Exception e) {
throw new ServletException(e);
- } finally {
+ }
+
+ return out.toString();
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+ if (true) {
+ PersistenceManager pm = null;
try {
- if (conn != null)
- conn.close();
- } catch (Throwable t) {}
+ pm = PMF.get().getPersistenceManager();
+
+
+
+
+ String query = "select from " + JdoStationBean.class.getName() + " where name.matches('Test.*')";
+ List stations = (List) pm.newQuery(query).execute();
+
+ logger.info("size=" + stations.size() );
+ for(JdoStationBean bean : stations) {
+ logger.info("Station: " + bean.getId() + "/" + bean.getName());
+ }
+
+ /*if (stations.size() == 0) {
+ JdoStationBean b = new JdoStationBean();
+ b.setId(1000);
+ b.setName("TestStation");
+ b.setMetro("12");
+ pm.makePersistent(b);
+
+ JdoStationBean b2 = new JdoStationBean();
+ b2.setId(1001);
+ b2.setName("teststation 2");
+ b2.setMetro("12");
+ pm.makePersistent(b2);
+ }*/
+
+
+
+ } 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);
+ }
}
}