traininfoservice/db/StationDAO.java

package dk.thoerup.traininfoservice.db;

import java.sql.Array;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Collections;
import java.util.Comparator;
import java.util.logging.Logger;

import dk.thoerup.android.traininfo.common.StationBean;
import dk.thoerup.android.traininfo.common.StationEntry;

public class StationDAO {
        
        private interface StatementParamSetter {
                public void setParams(PreparedStatement stmt) throws SQLException ;
        }
        private class NullSetter implements StatementParamSetter {
                @Override
                public void setParams(PreparedStatement stmt) throws SQLException {}
        }
        
        public static class NostationException extends Exception {
                private static final long serialVersionUID = 1L;
        }
        
        final static int LOCATION_LIMIT = 8;
        static final Logger logger = Logger.getLogger(StationDAO.class.getName());
        
        
        private StationEntry convertSingleRow(ResultSet res) throws SQLException {
                StationEntry station = new StationEntry();

                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) );
                
                station.setIsRegional( station.getRegional() != null );
                station.setIsStrain( station.getStrain() != null );
                station.setIsMetro( station.getMetro() != null );
                
                Array aliases = res.getArray( 10);
                if (aliases != null) {
                        station.setAliases( (String[]) aliases.getArray() );
                } else {
                        String[] emptyArray = {};
                        station.setAliases( emptyArray );
                }
                
                station.setTritStation( res.getInt(11) );
                if (res.wasNull())
                        station.setTritStation( -1 );

                return station;
        }

        private StationBean convertResultset(ResultSet res) throws SQLException {
                StationBean stations = new StationBean();
                while (res.next()) {
                        stations.entries.add( convertSingleRow(res) );
                }
                return stations;

        }

        private StationBean fetchStations(String SQL, StatementParamSetter setter) throws SQLException {
                StationBean stations;
                Connection conn = null;
                PreparedStatement stmt = null;
                ResultSet res = null;
                try {
                        conn = DBConnection.getConnection();
                        stmt = conn.prepareStatement(SQL);
                        
                        setter.setParams(stmt);

                        res = stmt.executeQuery();
                        stations = convertResultset(res);

                } finally {
                        if (res != null)
                                res.close();
                        if (stmt != null)
                                stmt.close();
                        if (conn!= null)
                                conn.close();
                }
                return stations;
                
        }

        public StationEntry getById(int id) throws SQLException,NostationException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
                "FROM trainstations WHERE id=" + id + " AND enabled=true";
                                
                StationBean stations =  fetchStations(SQL, new NullSetter() );
                
                if (stations.entries.size() > 0 ) {
                        return stations.entries.get(0);
                } else {
                        throw new NostationException();
                }
        }
        

        /*
         * this code requires theses statements are run on database in order to do ILIKE searches against aliases (which is defines as array of varchar(64) )
         *     create function rlike(text,text) returns bool as 
         *     'select $2 ilike $1' language sql strict immutable;
         *     create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);
         */
        public StationBean getByNameNormal(final String name) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " + 
                "FROM trainstations " + 
                "WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +
                "ORDER BY name ";

                class NameSetter implements StatementParamSetter {
                        @Override
                        public void setParams(PreparedStatement stmt) throws SQLException {
                                stmt.setString(1, name + "%");
                                stmt.setString(2, name + "%");                          
                        }                       
                }
                
                return fetchStations(SQL, new NameSetter() );
        }
        
        
        public StationBean getByNameFuzzy(final String name) throws SQLException {
                String SQL = "SELECT * FROM (" +
                                         "    SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, aliases, tritstation, " +
                                         "    levenshtein(lower(name),lower(?) ) as leven " +
                                         "    FROM trainstations " +
                                         "    WHERE  enabled = true ) as lev2 " +
                                         "WHERE (leven <= 3) " +                
                                         "ORDER BY leven " + 
                                         "LIMIT 1";

                class NameSetter implements StatementParamSetter {
                        @Override
                        public void setParams(PreparedStatement stmt) throws SQLException {
                                stmt.setString(1, name );
                        }                       
                }
                
                StationBean stations = fetchStations(SQL, new NameSetter() );
                stations.fuzzystrmatch = true;
                return stations;
        }
        
        private String removeSuffix(String str, String suffix) {
                if (str.endsWith(suffix)) {
                        return str.substring(0, str.length() - suffix.length() );
                } else {
                        return str;
                }
        }
        
        public StationBean getByName(String name) throws SQLException {
                name = removeSuffix(name, " st.");
                name = removeSuffix(name, " st");
                name = removeSuffix(name, " station");
                
                StationBean stations = getByNameNormal(name);
                
                if (stations.entries.size() == 0) {
                        stations = getByNameFuzzy(name);

                        logger.info("getByName failover: " + name + "(" + (stations.entries.size() >0) + ")" );
                }
                return stations;
        }
        
        
        //Latitude (horizonal), longitude(vertical) so
        // 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same 
        // 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles.
        // so 1 degree longitude is 64.5 km at denmarks southern point (gedser=54.55,11.95)
        // and is 59.4km at northern point (skagen = 57.75,10.65)
        // The "hack" with max 0.4 degrees latitude and 0.75 degrees longitude is only valid since we only service danish trains,
        // in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km

        // the ultra fast method  (and only slightly inaccurate as long as we only cover a limited geographically area)
        // is using an aproximation of the length of 1 latitude degree and 1 longitude degree and just use pythagoras to 
        // calculate the distance:
        //     sqrt( power(abs(latitude-?)*111320, 2) + power(abs(longitude-?)*63000,2) )::int as calcdist 

        public StationBean getByLocationWorker(final double latitude, final double longitude, final boolean geolimit) throws SQLException {
                
                String limitExpression = (geolimit == true) ? "AND abs(latitude-?)<0.4 AND abs(longitude-?)<0.75 " : "";
                
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, " + 
                        "earth_distance( earth_coord, ll_to_earth(?,?))::int AS calcdist,aliases,tritstation " + 
                        "FROM trainstations " +
                        "WHERE enabled = true " + limitExpression +
                        "ORDER BY calcdist ASC " + 
                        "LIMIT " + LOCATION_LIMIT;

                
                class LatlongSetter implements StatementParamSetter {
                        @Override
                        public void setParams(PreparedStatement stmt) throws SQLException {
                                stmt.setDouble(1, latitude);
                                stmt.setDouble(2, longitude);
                                if (geolimit == true) {
                                        stmt.setDouble(3, latitude);
                                        stmt.setDouble(4, longitude);
                                }                               
                        }                       
                }
                
                return fetchStations(SQL, new LatlongSetter() );
        }
        
        public StationBean getByLocation(double latitude, double longitude) throws SQLException {
                StationBean result = getByLocationWorker(latitude, longitude, true);
                
                if (result.entries.size() < LOCATION_LIMIT) { //failover
                        logger.info("getByLocation failover: " +latitude + "," + longitude);
                        
                        result = getByLocationWorker(latitude, longitude, false);
                }
                
                return result;
        }
        
        
        public StationBean getByList(String list) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0,aliases,tritstation " + 
                "FROM trainstations " + 
                "WHERE id IN " + list + " AND enabled = true " +
                "ORDER BY name ";
                
                return fetchStations(SQL, new NullSetter() );
        }
        

        public StationEntry getSimpleByName(final String name) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " + 
                "FROM trainstations " + 
                "WHERE name = ?  AND enabled = true " +
                "LIMIT 1 ";

                class NameSetter implements StatementParamSetter {
                        @Override
                        public void setParams(PreparedStatement stmt) throws SQLException {
                                stmt.setString(1, name );
                        }                       
                }
                
                StationBean stations = fetchStations(SQL, new NameSetter() );
                
                if (stations.entries.size() == 1) {
                        return stations.entries.get(0);
                } else {
                        return null;
                }
        }
        
        Comparator<StationEntry> nameComparator = new Comparator<StationEntry>() {
                @Override
                public int compare(StationEntry arg0, StationEntry arg1) {
                        return arg0.getName().compareTo( arg1.getName() );
                }               
        };
        
        //used to create full dump in order to populate Google Appengine DB
        //after 1.1.0 also used to populate client-side station list
        public StationBean dumpAll() throws SQLException {
                
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
                                "FROM trainstations WHERE enabled = true";
                
                
                StationBean stations = fetchStations(SQL, new NullSetter() );
                Collections.sort( stations.entries,nameComparator );
                
                return stations;
                
                /*
                Connection conn = null;
                Statement stmt = null;
                ResultSet res = null;           

                
                try {
                        conn = DBConnection.getConnection();

                        stmt = conn.createStatement();
                        res = stmt.executeQuery(SQL);           
                                                
                        // Does mostly the same as convertResultset()
                        StationBean stations = new StationBean();
                        while (res.next()) {
                                StationEntry entry = convertSingleRow(res);
                                
                                Array arr = res.getArray(10);
                                if (arr != null) {
                                        String[] aliases = (String[]) arr.getArray();
                                        entry.setAliases(aliases);
                                }
                                
                                stations.entries.add( entry );
                                
                        }
                        Collections.sort( stations.entries,nameComparator );
                        return stations;
                        

                } finally {
                        if (res != null)
                                res.close();
                        if (stmt != null)
                                stmt.close();
                        if (conn != null)
                                conn.close();
                }*/
                
        }

        /*
        @Deprecated
        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;
        }*/
        
        public boolean hasDisabledStation(final String name) throws SQLException {
                String SQL = "Select count(*) as antal from trainstations where name = '" + name + "'  and enabled=false " ;

                Connection conn = DBConnection.getConnection();
                Statement stmt = conn.createStatement();
                ResultSet rs = stmt.executeQuery( SQL );
                
                rs.next();

                int antal = rs.getInt(1);
                
                rs.close();
                stmt.close(); 
                conn.close();
                
                return (antal > 0);
        }
        
        /*
        @Deprecated
        public int getIdByName(final String name) throws SQLException {
                String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " + 
                "FROM trainstations " + 
                "WHERE name = ?  AND enabled = true " +
                "LIMIT 1 ";

                class NameSetter implements StatementParamSetter {
                        @Override
                        public void setParams(PreparedStatement stmt) throws SQLException {
                                stmt.setString(1, name );
                        }                       
                }
                
                StationBean stations = fetchStations(SQL, new NameSetter() );
                
                if (stations.entries.size() == 1) {
                        return stations.entries.get(0).getId();
                } else {
                        return -1;
                }
        }*/
}
1	torben	1255	package dk.thoerup.traininfoservice.db;
2	torben	588
3	torben	1082	import java.sql.Array;
4	torben	588	import java.sql.Connection;
5			import java.sql.PreparedStatement;
6			import java.sql.ResultSet;
7			import java.sql.SQLException;
8			import java.sql.Statement;
9	torben	1574	import java.util.Collections;
10			import java.util.Comparator;
11	torben	895	import java.util.logging.Logger;
12	torben	588
13	torben	1061	import dk.thoerup.android.traininfo.common.StationBean;
14	torben	1409	import dk.thoerup.android.traininfo.common.StationEntry;
15	torben	1060
16	torben	588	public class StationDAO {
17	torben	1145
18	torben	1504	private interface StatementParamSetter {
19			public void setParams(PreparedStatement stmt) throws SQLException ;
20			}
21			private class NullSetter implements StatementParamSetter {
22			@Override
23			public void setParams(PreparedStatement stmt) throws SQLException {}
24			}
25
26	torben	1145	public static class NostationException extends Exception {
27			private static final long serialVersionUID = 1L;
28			}
29
30	torben	997	final static int LOCATION_LIMIT = 8;
31	torben	895	static final Logger logger = Logger.getLogger(StationDAO.class.getName());
32	torben	841
33	torben	895
34	torben	1060	private StationEntry convertSingleRow(ResultSet res) throws SQLException {
35			StationEntry station = new StationEntry();
36	torben	836
37	torben	588	station.setId( res.getInt(1) );
38			station.setName( res.getString(2) );
39			station.setLatitude( res.getDouble(3) );
40			station.setLongitude( res.getDouble(4) );
41			station.setRegional( res.getString(5) );
42			station.setStrain( res.getString(6) );
43			station.setMetro( res.getString(7) );
44			station.setAddress( res.getString(8) );
45			station.setCalcdist( (int)res.getDouble(9) );
46	torben	1060
47			station.setIsRegional( station.getRegional() != null );
48			station.setIsStrain( station.getStrain() != null );
49			station.setIsMetro( station.getMetro() != null );
50	torben	1790
51			Array aliases = res.getArray( 10);
52			if (aliases != null) {
53			station.setAliases( (String[]) aliases.getArray() );
54			} else {
55			String[] emptyArray = {};
56			station.setAliases( emptyArray );
57			}
58	torben	1832
59			station.setTritStation( res.getInt(11) );
60			if (res.wasNull())
61			station.setTritStation( -1 );
62	torben	836
63	torben	588	return station;
64			}
65	torben	836
66	torben	1060	private StationBean convertResultset(ResultSet res) throws SQLException {
67			StationBean stations = new StationBean();
68	torben	588	while (res.next()) {
69	torben	1060	stations.entries.add( convertSingleRow(res) );
70	torben	588	}
71			return stations;
72	torben	836
73	torben	588	}
74	torben	836
75	torben	1504	private StationBean fetchStations(String SQL, StatementParamSetter setter) throws SQLException {
76			StationBean stations;
77	torben	588	Connection conn = null;
78	torben	1504	PreparedStatement stmt = null;
79	torben	589	ResultSet res = null;
80	torben	588	try {
81			conn = DBConnection.getConnection();
82	torben	1504	stmt = conn.prepareStatement(SQL);
83
84			setter.setParams(stmt);
85	torben	836
86	torben	1504	res = stmt.executeQuery();
87			stations = convertResultset(res);
88
89	torben	588	} finally {
90	torben	589	if (res != null)
91			res.close();
92			if (stmt != null)
93			stmt.close();
94	torben	1504	if (conn!= null)
95	torben	588	conn.close();
96			}
97	torben	1504	return stations;
98
99			}
100	torben	836
101	torben	1504	public StationEntry getById(int id) throws SQLException,NostationException {
102	torben	1832	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
103	torben	1504	"FROM trainstations WHERE id=" + id + " AND enabled=true";
104
105			StationBean stations = fetchStations(SQL, new NullSetter() );
106
107			if (stations.entries.size() > 0 ) {
108			return stations.entries.get(0);
109			} else {
110			throw new NostationException();
111			}
112	torben	588	}
113	torben	1082
114	torben	836
115	torben	1082
116	torben	714	/*
117			* this code requires theses statements are run on database in order to do ILIKE searches against aliases (which is defines as array of varchar(64) )
118			* create function rlike(text,text) returns bool as
119			* 'select $2 ilike $1' language sql strict immutable;
120	torben	836	* create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);
121	torben	714	*/
122	torben	1507	public StationBean getByNameNormal(final String name) throws SQLException {
123	torben	1832	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
124	torben	588	"FROM trainstations " +
125	torben	714	"WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +
126	torben	588	"ORDER BY name ";
127
128	torben	1504	class NameSetter implements StatementParamSetter {
129			@Override
130			public void setParams(PreparedStatement stmt) throws SQLException {
131			stmt.setString(1, name + "%");
132			stmt.setString(2, name + "%");
133			}
134	torben	588	}
135	torben	1504
136			return fetchStations(SQL, new NameSetter() );
137	torben	588	}
138	torben	1507
139
140			public StationBean getByNameFuzzy(final String name) throws SQLException {
141	torben	1512	String SQL = "SELECT * FROM (" +
142	torben	1832	" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, aliases, tritstation, " +
143	torben	1512	" levenshtein(lower(name),lower(?) ) as leven " +
144			" FROM trainstations " +
145			" WHERE enabled = true ) as lev2 " +
146			"WHERE (leven <= 3) " +
147			"ORDER BY leven " +
148			"LIMIT 1";
149	torben	836
150	torben	1507	class NameSetter implements StatementParamSetter {
151			@Override
152			public void setParams(PreparedStatement stmt) throws SQLException {
153			stmt.setString(1, name );
154			}
155			}
156
157			StationBean stations = fetchStations(SQL, new NameSetter() );
158			stations.fuzzystrmatch = true;
159			return stations;
160			}
161
162	torben	1516	private String removeSuffix(String str, String suffix) {
163			if (str.endsWith(suffix)) {
164			return str.substring(0, str.length() - suffix.length() );
165			} else {
166			return str;
167			}
168			}
169
170	torben	1513	public StationBean getByName(String name) throws SQLException {
171	torben	1516	name = removeSuffix(name, " st.");
172			name = removeSuffix(name, " st");
173			name = removeSuffix(name, " station");
174
175	torben	1507	StationBean stations = getByNameNormal(name);
176
177			if (stations.entries.size() == 0) {
178			stations = getByNameFuzzy(name);
179	torben	1515
180			logger.info("getByName failover: " + name + "(" + (stations.entries.size() >0) + ")" );
181	torben	1507	}
182			return stations;
183			}
184
185
186
187	torben	1254	//Latitude (horizonal), longitude(vertical) so
188			// 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same
189			// 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles.
190	torben	1511	// so 1 degree longitude is 64.5 km at denmarks southern point (gedser=54.55,11.95)
191			// and is 59.4km at northern point (skagen = 57.75,10.65)
192			// The "hack" with max 0.4 degrees latitude and 0.75 degrees longitude is only valid since we only service danish trains,
193	torben	928	// in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km
194	torben	836
195	torben	741	// the ultra fast method (and only slightly inaccurate as long as we only cover a limited geographically area)
196			// is using an aproximation of the length of 1 latitude degree and 1 longitude degree and just use pythagoras to
197			// calculate the distance:
198	torben	836	// sqrt( power(abs(latitude-?)111320, 2) + power(abs(longitude-?)63000,2) )::int as calcdist
199
200	torben	1504	public StationBean getByLocationWorker(final double latitude, final double longitude, final boolean geolimit) throws SQLException {
201	torben	841
202	torben	929	String limitExpression = (geolimit == true) ? "AND abs(latitude-?)<0.4 AND abs(longitude-?)<0.75 " : "";
203	torben	841
204			String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, " +
205	torben	1832	"earth_distance( earth_coord, ll_to_earth(?,?))::int AS calcdist,aliases,tritstation " +
206	torben	841	"FROM trainstations " +
207			"WHERE enabled = true " + limitExpression +
208			"ORDER BY calcdist ASC " +
209			"LIMIT " + LOCATION_LIMIT;
210	torben	849
211	torben	841
212	torben	1504	class LatlongSetter implements StatementParamSetter {
213			@Override
214			public void setParams(PreparedStatement stmt) throws SQLException {
215			stmt.setDouble(1, latitude);
216			stmt.setDouble(2, longitude);
217			if (geolimit == true) {
218			stmt.setDouble(3, latitude);
219			stmt.setDouble(4, longitude);
220			}
221			}
222			}
223	torben	849
224	torben	1504	return fetchStations(SQL, new LatlongSetter() );
225	torben	588	}
226	torben	841
227	torben	1060	public StationBean getByLocation(double latitude, double longitude) throws SQLException {
228			StationBean result = getByLocationWorker(latitude, longitude, true);
229	torben	841
230	torben	1060	if (result.entries.size() < LOCATION_LIMIT) { //failover
231	torben	894	logger.info("getByLocation failover: " +latitude + "," + longitude);
232
233	torben	841	result = getByLocationWorker(latitude, longitude, false);
234			}
235
236			return result;
237			}
238
239
240	torben	836
241	torben	1060	public StationBean getByList(String list) throws SQLException {
242	torben	1832	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0,aliases,tritstation " +
243	torben	836	"FROM trainstations " +
244			"WHERE id IN " + list + " AND enabled = true " +
245			"ORDER BY name ";
246	torben	1504
247			return fetchStations(SQL, new NullSetter() );
248			}
249
250	torben	836
251	torben	1504
252			public StationEntry getSimpleByName(final String name) throws SQLException {
253	torben	1832	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
254	torben	1504	"FROM trainstations " +
255			"WHERE name = ? AND enabled = true " +
256			"LIMIT 1 ";
257	torben	836
258	torben	1504	class NameSetter implements StatementParamSetter {
259			@Override
260			public void setParams(PreparedStatement stmt) throws SQLException {
261			stmt.setString(1, name );
262			}
263	torben	836	}
264	torben	1504
265			StationBean stations = fetchStations(SQL, new NameSetter() );
266
267			if (stations.entries.size() == 1) {
268			return stations.entries.get(0);
269			} else {
270			return null;
271			}
272			}
273	torben	1505
274	torben	1574	Comparator<StationEntry> nameComparator = new Comparator<StationEntry>() {
275			@Override
276			public int compare(StationEntry arg0, StationEntry arg1) {
277			return arg0.getName().compareTo( arg1.getName() );
278			}
279			};
280
281	torben	1505	//used to create full dump in order to populate Google Appengine DB
282	torben	1569	//after 1.1.0 also used to populate client-side station list
283	torben	1505	public StationBean dumpAll() throws SQLException {
284
285	torben	1832	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
286	torben	1574	"FROM trainstations WHERE enabled = true";
287	torben	1505
288	torben	1575
289			StationBean stations = fetchStations(SQL, new NullSetter() );
290			Collections.sort( stations.entries,nameComparator );
291
292			return stations;
293
294			/*
295	torben	1505	Connection conn = null;
296			Statement stmt = null;
297			ResultSet res = null;
298	torben	836
299	torben	1505
300			try {
301			conn = DBConnection.getConnection();
302
303			stmt = conn.createStatement();
304			res = stmt.executeQuery(SQL);
305
306			// Does mostly the same as convertResultset()
307			StationBean stations = new StationBean();
308			while (res.next()) {
309			StationEntry entry = convertSingleRow(res);
310
311			Array arr = res.getArray(10);
312			if (arr != null) {
313			String[] aliases = (String[]) arr.getArray();
314			entry.setAliases(aliases);
315			}
316
317			stations.entries.add( entry );
318
319			}
320	torben	1574	Collections.sort( stations.entries,nameComparator );
321	torben	1505	return stations;
322
323
324			} finally {
325			if (res != null)
326			res.close();
327			if (stmt != null)
328			stmt.close();
329			if (conn != null)
330			conn.close();
331	torben	1575	}*/
332	torben	1505
333			}
334
335	torben	1832	/*
336	torben	1417	@Deprecated
337	torben	836	public static String getStationName(int stationID) {
338			String station = "";
339
340			Connection conn = null;
341			try {
342			conn = DBConnection.getConnection();
343			Statement stmt = conn.createStatement();
344			ResultSet rs = stmt.executeQuery("SELECT name FROM trainstations WHERE id=" + stationID);
345			if (rs.next()) {
346			station = rs.getString(1);
347			}
348
349			} catch (Exception e) {
350			} finally {
351	torben	588	try {
352	torben	836	if (conn != null && !conn.isClosed())
353	torben	588	conn.close();
354	torben	836	} catch (Exception e) {}
355			}
356	torben	650
357	torben	836	return station;
358	torben	1832	}*/
359	torben	1417
360	torben	1692	public boolean hasDisabledStation(final String name) throws SQLException {
361			String SQL = "Select count(*) as antal from trainstations where name = '" + name + "' and enabled=false " ;
362
363			Connection conn = DBConnection.getConnection();
364			Statement stmt = conn.createStatement();
365			ResultSet rs = stmt.executeQuery( SQL );
366
367			rs.next();
368
369			int antal = rs.getInt(1);
370
371			rs.close();
372			stmt.close();
373			conn.close();
374
375			return (antal > 0);
376			}
377	torben	1504
378	torben	1832	/*
379	torben	1417	@Deprecated
380	torben	1504	public int getIdByName(final String name) throws SQLException {
381	torben	836	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +
382			"FROM trainstations " +
383			"WHERE name = ? AND enabled = true " +
384			"LIMIT 1 ";
385	torben	650
386	torben	1504	class NameSetter implements StatementParamSetter {
387			@Override
388			public void setParams(PreparedStatement stmt) throws SQLException {
389			stmt.setString(1, name );
390			}
391	torben	836	}
392	torben	1504
393			StationBean stations = fetchStations(SQL, new NameSetter() );
394
395			if (stations.entries.size() == 1) {
396			return stations.entries.get(0).getId();
397	torben	836	} else {
398			return -1;
399			}
400	torben	1832	}*/
401	torben	588	}