thoerup/traininfoservice/StationDAO.java

package dk.thoerup.traininfoservice;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class StationDAO {
        private StationBean convertSingleRow(ResultSet res) throws SQLException {
                StationBean station = new StationBean();
                
                station.setId( res.getInt(1) );
                station.setName( res.getString(2) );
                station.setLatitude( res.getDouble(3) );
                station.setLongitude( res.getDouble(4) );
                station.setRegional( res.getString(5) );
                station.setStrain( res.getString(6) );
                station.setMetro( res.getString(7) );
                station.setAddress( res.getString(8) );
                station.setCalcdist( (int)res.getDouble(9) );
                
                return station;
        }
        
        private List<StationBean> convertResultset(ResultSet res) throws SQLException {
                List<StationBean> stations = new ArrayList<StationBean>();
                while (res.next()) {
                        stations.add( convertSingleRow(res) );
                }
                return stations;
                
        }
        
        
        public StationBean getById(int id) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0 " +
                      "FROM trainstations WHERE id=" + id + " AND enabled=true";
                
                Connection conn = null;
                Statement stmt = null;
                ResultSet res = null;
                StationBean result;
                
                try {
                        conn = DBConnection.getConnection();
                
                        stmt = conn.createStatement();
                        res = stmt.executeQuery(SQL);           
                        res.next();
                        result = convertSingleRow(res);
                } finally {
                        if (res != null)
                                res.close();
                        if (stmt != null)
                                stmt.close();
                        if (conn != null)
                                conn.close();
                }
                
                return result;
        }
        
        
        public List<StationBean> getByName(String name) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " + 
                "FROM trainstations " + 
                "WHERE name ILIKE ? AND enabled = true " +
                "ORDER BY name ";

                
                List<StationBean> result;
                Connection conn = null;
                PreparedStatement stmt = null;
                ResultSet res = null;
                try {
                        conn = DBConnection.getConnection();
                        stmt = conn.prepareStatement(SQL);
                        
                        stmt.setString(1, name + "%");
                        
                        res = stmt.executeQuery();
                        result = convertResultset(res);
                        
                } finally {
                        if (res != null)
                                res.close();
                        if (stmt != null)
                                stmt.close();
                        if (conn!= null)
                                conn.close();
                }
                return result;
        }
         
        public List<StationBean> getByLocation(double latitude, double longitude) throws SQLException {
                String SQL = "SELECT * FROM ( "+
                "               SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address," + 
                "                     earth_distance( ll_to_earth(latitude,longitude), ll_to_earth(?,?))::int AS calcdist " + 
                "               FROM trainstations " +
                "               WHERE enabled = true " +
                "       ) AS trainstations2 " +
                "ORDER BY calcdist ASC " + 
                "LIMIT 4 ";
                List<StationBean> result;
                Connection conn = null;
                PreparedStatement stmt = null;
                ResultSet res = null;
                try {
                        conn = DBConnection.getConnection();
                        stmt = conn.prepareStatement(SQL);
                        stmt.setDouble(1, latitude);
                        stmt.setDouble(2, longitude);
                        res = stmt.executeQuery();
                        result = convertResultset(res);
                        
                } finally {
                        if (res != null)
                                res.close();
                        if (stmt != null)
                                stmt.close();
                        if (conn!= null)
                                conn.close();
                }
                return result;
        }
         
         public List<StationBean> getByList(String list) throws SQLException {
                        String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0 " + 
                        "FROM trainstations " + 
                        "WHERE id IN " + list + " AND enabled = true " +
                        "ORDER BY name ";
                        
                        Connection conn = null;
                        Statement stmt = null;
                        ResultSet res = null;
                        List<StationBean> result;
                        
                        try {
                                conn = DBConnection.getConnection();
                                stmt = conn.createStatement();
                                res = stmt.executeQuery(SQL);
                                result = convertResultset(res);
                        } finally {
                                if (res != null)
                                        res.close();
                                if (stmt != null)
                                        stmt.close();
                                if (conn!= null)
                                        conn.close();
                        }
                        
                        return result;
                        
         }
         public static String getStationName(int stationID) {
                 String station = "";

                 Connection conn = null;
                 try {
                         conn = DBConnection.getConnection();
                         Statement stmt = conn.createStatement();
                         ResultSet rs = stmt.executeQuery("SELECT name FROM trainstations WHERE id=" + stationID);
                         if (rs.next()) {
                                 station = rs.getString(1);
                         }

                 } catch (Exception e) {        
                 } finally {
                         try {
                                 if (conn != null && !conn.isClosed())
                                         conn.close();
                         } catch (Exception e) {}
                 }

                 return station;
         }
}
1	torben	588	package dk.thoerup.traininfoservice;
2
3			import java.sql.Connection;
4			import java.sql.PreparedStatement;
5			import java.sql.ResultSet;
6			import java.sql.SQLException;
7			import java.sql.Statement;
8			import java.util.ArrayList;
9			import java.util.List;
10
11			public class StationDAO {
12			private StationBean convertSingleRow(ResultSet res) throws SQLException {
13			StationBean station = new StationBean();
14
15			station.setId( res.getInt(1) );
16			station.setName( res.getString(2) );
17			station.setLatitude( res.getDouble(3) );
18			station.setLongitude( res.getDouble(4) );
19			station.setRegional( res.getString(5) );
20			station.setStrain( res.getString(6) );
21			station.setMetro( res.getString(7) );
22			station.setAddress( res.getString(8) );
23			station.setCalcdist( (int)res.getDouble(9) );
24
25			return station;
26			}
27
28			private List<StationBean> convertResultset(ResultSet res) throws SQLException {
29			List<StationBean> stations = new ArrayList<StationBean>();
30			while (res.next()) {
31			stations.add( convertSingleRow(res) );
32			}
33			return stations;
34
35			}
36
37
38			public StationBean getById(int id) throws SQLException {
39			String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0 " +
40			"FROM trainstations WHERE id=" + id + " AND enabled=true";
41
42			Connection conn = null;
43	torben	589	Statement stmt = null;
44			ResultSet res = null;
45	torben	588	StationBean result;
46
47			try {
48			conn = DBConnection.getConnection();
49
50	torben	589	stmt = conn.createStatement();
51			res = stmt.executeQuery(SQL);
52	torben	588	res.next();
53			result = convertSingleRow(res);
54			} finally {
55	torben	589	if (res != null)
56			res.close();
57			if (stmt != null)
58			stmt.close();
59	torben	588	if (conn != null)
60			conn.close();
61			}
62
63			return result;
64			}
65
66
67			public List<StationBean> getByName(String name) throws SQLException {
68			String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +
69			"FROM trainstations " +
70			"WHERE name ILIKE ? AND enabled = true " +
71			"ORDER BY name ";
72
73
74			List<StationBean> result;
75			Connection conn = null;
76	torben	589	PreparedStatement stmt = null;
77			ResultSet res = null;
78	torben	588	try {
79			conn = DBConnection.getConnection();
80	torben	589	stmt = conn.prepareStatement(SQL);
81	torben	588
82			stmt.setString(1, name + "%");
83
84	torben	589	res = stmt.executeQuery();
85			result = convertResultset(res);
86	torben	588
87			} finally {
88	torben	589	if (res != null)
89			res.close();
90			if (stmt != null)
91			stmt.close();
92			if (conn!= null)
93	torben	588	conn.close();
94			}
95			return result;
96			}
97
98			public List<StationBean> getByLocation(double latitude, double longitude) throws SQLException {
99			String SQL = "SELECT * FROM ( "+
100			" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address," +
101			" earth_distance( ll_to_earth(latitude,longitude), ll_to_earth(?,?))::int AS calcdist " +
102			" FROM trainstations " +
103			" WHERE enabled = true " +
104			" ) AS trainstations2 " +
105			"ORDER BY calcdist ASC " +
106			"LIMIT 4 ";
107			List<StationBean> result;
108			Connection conn = null;
109	torben	589	PreparedStatement stmt = null;
110			ResultSet res = null;
111	torben	588	try {
112			conn = DBConnection.getConnection();
113	torben	589	stmt = conn.prepareStatement(SQL);
114	torben	588	stmt.setDouble(1, latitude);
115			stmt.setDouble(2, longitude);
116	torben	589	res = stmt.executeQuery();
117			result = convertResultset(res);
118	torben	588
119			} finally {
120	torben	589	if (res != null)
121			res.close();
122			if (stmt != null)
123			stmt.close();
124			if (conn!= null)
125	torben	588	conn.close();
126			}
127			return result;
128			}
129
130			public List<StationBean> getByList(String list) throws SQLException {
131			String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0 " +
132			"FROM trainstations " +
133			"WHERE id IN " + list + " AND enabled = true " +
134			"ORDER BY name ";
135
136			Connection conn = null;
137	torben	589	Statement stmt = null;
138			ResultSet res = null;
139	torben	588	List<StationBean> result;
140
141			try {
142			conn = DBConnection.getConnection();
143	torben	589	stmt = conn.createStatement();
144			res = stmt.executeQuery(SQL);
145	torben	588	result = convertResultset(res);
146			} finally {
147	torben	589	if (res != null)
148			res.close();
149			if (stmt != null)
150			stmt.close();
151	torben	588	if (conn!= null)
152			conn.close();
153			}
154
155			return result;
156
157			}
158	torben	650	public static String getStationName(int stationID) {
159			String station = "";
160
161			Connection conn = null;
162			try {
163			conn = DBConnection.getConnection();
164			Statement stmt = conn.createStatement();
165			ResultSet rs = stmt.executeQuery("SELECT name FROM trainstations WHERE id=" + stationID);
166			if (rs.next()) {
167			station = rs.getString(1);
168			}
169
170			} catch (Exception e) {
171			} finally {
172			try {
173			if (conn != null && !conn.isClosed())
174			conn.close();
175			} catch (Exception e) {}
176			}
177
178			return station;
179			}
180	torben	588	}