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;
                StationBean result;
                
                try {
                        conn = DBConnection.getConnection();
                
                        Statement stmt = conn.createStatement();
                        ResultSet res = stmt.executeQuery(SQL);         
                        res.next();
                        result = convertSingleRow(res);
                } finally {
                        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;
                try {
                        conn = DBConnection.getConnection();
                        PreparedStatement stmt = conn.prepareStatement(SQL);
                        
                        stmt.setString(1, name + "%");
                        
                        ResultSet rs = stmt.executeQuery();
                        result = convertResultset(rs);
                        
                } finally {
                        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;
                try {
                        conn = DBConnection.getConnection();
                        PreparedStatement stmt = conn.prepareStatement(SQL);
                        stmt.setDouble(1, latitude);
                        stmt.setDouble(2, longitude);
                        ResultSet rs = stmt.executeQuery();
                        result = convertResultset(rs);
                        
                } finally {
                        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;
                        List<StationBean> result;
                        
                        try {
                                conn = DBConnection.getConnection();
                                Statement stmt = conn.createStatement();
                                ResultSet res = stmt.executeQuery(SQL);
                                result = convertResultset(res);
                        } finally {
                                if (conn!= null)
                                        conn.close();
                        }
                        
                        return result;
                        
         }
         
}
1	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	StationBean result;
44
45	try {
46	conn = DBConnection.getConnection();
47
48	Statement stmt = conn.createStatement();
49	ResultSet res = stmt.executeQuery(SQL);
50	res.next();
51	result = convertSingleRow(res);
52	} finally {
53	if (conn != null)
54	conn.close();
55	}
56
57	return result;
58	}
59
60
61	public List<StationBean> getByName(String name) throws SQLException {
62	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +
63	"FROM trainstations " +
64	"WHERE name ILIKE ? AND enabled = true " +
65	"ORDER BY name ";
66
67
68	List<StationBean> result;
69	Connection conn = null;
70	try {
71	conn = DBConnection.getConnection();
72	PreparedStatement stmt = conn.prepareStatement(SQL);
73
74	stmt.setString(1, name + "%");
75
76	ResultSet rs = stmt.executeQuery();
77	result = convertResultset(rs);
78
79	} finally {
80	if (conn != null)
81	conn.close();
82	}
83	return result;
84	}
85
86	public List<StationBean> getByLocation(double latitude, double longitude) throws SQLException {
87	String SQL = "SELECT * FROM ( "+
88	" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address," +
89	" earth_distance( ll_to_earth(latitude,longitude), ll_to_earth(?,?))::int AS calcdist " +
90	" FROM trainstations " +
91	" WHERE enabled = true " +
92	" ) AS trainstations2 " +
93	"ORDER BY calcdist ASC " +
94	"LIMIT 4 ";
95	List<StationBean> result;
96	Connection conn = null;
97	try {
98	conn = DBConnection.getConnection();
99	PreparedStatement stmt = conn.prepareStatement(SQL);
100	stmt.setDouble(1, latitude);
101	stmt.setDouble(2, longitude);
102	ResultSet rs = stmt.executeQuery();
103	result = convertResultset(rs);
104
105	} finally {
106	if (conn != null)
107	conn.close();
108	}
109	return result;
110	}
111
112	public List<StationBean> getByList(String list) throws SQLException {
113	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0 " +
114	"FROM trainstations " +
115	"WHERE id IN " + list + " AND enabled = true " +
116	"ORDER BY name ";
117
118	Connection conn = null;
119	List<StationBean> result;
120
121	try {
122	conn = DBConnection.getConnection();
123	Statement stmt = conn.createStatement();
124	ResultSet res = stmt.executeQuery(SQL);
125	result = convertResultset(res);
126	} finally {
127	if (conn!= null)
128	conn.close();
129	}
130
131	return result;
132
133	}
134
135	}