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 );
                }

                int tritStation = res.getInt(11);
                if (res.wasNull()) {
                        tritStation = -1;
                }
                station.setTritStation( tritStation );

                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	package dk.thoerup.traininfoservice.db;
2
3	import java.sql.Array;
4	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	import java.util.Collections;
10	import java.util.Comparator;
11	import java.util.logging.Logger;
12
13	import dk.thoerup.android.traininfo.common.StationBean;
14	import dk.thoerup.android.traininfo.common.StationEntry;
15
16	public class StationDAO {
17
18	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	public static class NostationException extends Exception {
27	private static final long serialVersionUID = 1L;
28	}
29
30	final static int LOCATION_LIMIT = 8;
31	static final Logger logger = Logger.getLogger(StationDAO.class.getName());
32
33
34	private StationEntry convertSingleRow(ResultSet res) throws SQLException {
35	StationEntry station = new StationEntry();
36
37	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
47	station.setIsRegional( station.getRegional() != null );
48	station.setIsStrain( station.getStrain() != null );
49	station.setIsMetro( station.getMetro() != null );
50
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
59	int tritStation = res.getInt(11);
60	if (res.wasNull()) {
61	tritStation = -1;
62	}
63	station.setTritStation( tritStation );
64
65	return station;
66	}
67
68	private StationBean convertResultset(ResultSet res) throws SQLException {
69	StationBean stations = new StationBean();
70	while (res.next()) {
71	stations.entries.add( convertSingleRow(res) );
72	}
73	return stations;
74
75	}
76
77	private StationBean fetchStations(String SQL, StatementParamSetter setter) throws SQLException {
78	StationBean stations;
79	Connection conn = null;
80	PreparedStatement stmt = null;
81	ResultSet res = null;
82	try {
83	conn = DBConnection.getConnection();
84	stmt = conn.prepareStatement(SQL);
85
86	setter.setParams(stmt);
87
88	res = stmt.executeQuery();
89	stations = convertResultset(res);
90
91	} finally {
92	if (res != null)
93	res.close();
94	if (stmt != null)
95	stmt.close();
96	if (conn!= null)
97	conn.close();
98	}
99	return stations;
100
101	}
102
103	public StationEntry getById(int id) throws SQLException,NostationException {
104	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
105	"FROM trainstations WHERE id=" + id + " AND enabled=true";
106
107	StationBean stations = fetchStations(SQL, new NullSetter() );
108
109	if (stations.entries.size() > 0 ) {
110	return stations.entries.get(0);
111	} else {
112	throw new NostationException();
113	}
114	}
115
116
117
118	/*
119	* 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) )
120	* create function rlike(text,text) returns bool as
121	* 'select $2 ilike $1' language sql strict immutable;
122	* create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);
123	*/
124	public StationBean getByNameNormal(final String name) throws SQLException {
125	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
126	"FROM trainstations " +
127	"WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +
128	"ORDER BY name ";
129
130	class NameSetter implements StatementParamSetter {
131	@Override
132	public void setParams(PreparedStatement stmt) throws SQLException {
133	stmt.setString(1, name + "%");
134	stmt.setString(2, name + "%");
135	}
136	}
137
138	return fetchStations(SQL, new NameSetter() );
139	}
140
141
142	public StationBean getByNameFuzzy(final String name) throws SQLException {
143	String SQL = "SELECT * FROM (" +
144	" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, aliases, tritstation, " +
145	" levenshtein(lower(name),lower(?) ) as leven " +
146	" FROM trainstations " +
147	" WHERE enabled = true ) as lev2 " +
148	"WHERE (leven <= 3) " +
149	"ORDER BY leven " +
150	"LIMIT 1";
151
152	class NameSetter implements StatementParamSetter {
153	@Override
154	public void setParams(PreparedStatement stmt) throws SQLException {
155	stmt.setString(1, name );
156	}
157	}
158
159	StationBean stations = fetchStations(SQL, new NameSetter() );
160	stations.fuzzystrmatch = true;
161	return stations;
162	}
163
164	private String removeSuffix(String str, String suffix) {
165	if (str.endsWith(suffix)) {
166	return str.substring(0, str.length() - suffix.length() );
167	} else {
168	return str;
169	}
170	}
171
172	public StationBean getByName(String name) throws SQLException {
173	name = removeSuffix(name, " st.");
174	name = removeSuffix(name, " st");
175	name = removeSuffix(name, " station");
176
177	StationBean stations = getByNameNormal(name);
178
179	if (stations.entries.size() == 0) {
180	stations = getByNameFuzzy(name);
181
182	logger.info("getByName failover: " + name + "(" + (stations.entries.size() >0) + ")" );
183	}
184	return stations;
185	}
186
187
188
189	//Latitude (horizonal), longitude(vertical) so
190	// 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same
191	// 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles.
192	// so 1 degree longitude is 64.5 km at denmarks southern point (gedser=54.55,11.95)
193	// and is 59.4km at northern point (skagen = 57.75,10.65)
194	// The "hack" with max 0.4 degrees latitude and 0.75 degrees longitude is only valid since we only service danish trains,
195	// in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km
196
197	// the ultra fast method (and only slightly inaccurate as long as we only cover a limited geographically area)
198	// is using an aproximation of the length of 1 latitude degree and 1 longitude degree and just use pythagoras to
199	// calculate the distance:
200	// sqrt( power(abs(latitude-?)111320, 2) + power(abs(longitude-?)63000,2) )::int as calcdist
201
202	public StationBean getByLocationWorker(final double latitude, final double longitude, final boolean geolimit) throws SQLException {
203
204	String limitExpression = (geolimit == true) ? "AND abs(latitude-?)<0.4 AND abs(longitude-?)<0.75 " : "";
205
206	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, " +
207	"earth_distance( earth_coord, ll_to_earth(?,?))::int AS calcdist,aliases,tritstation " +
208	"FROM trainstations " +
209	"WHERE enabled = true " + limitExpression +
210	"ORDER BY calcdist ASC " +
211	"LIMIT " + LOCATION_LIMIT;
212
213
214	class LatlongSetter implements StatementParamSetter {
215	@Override
216	public void setParams(PreparedStatement stmt) throws SQLException {
217	stmt.setDouble(1, latitude);
218	stmt.setDouble(2, longitude);
219	if (geolimit == true) {
220	stmt.setDouble(3, latitude);
221	stmt.setDouble(4, longitude);
222	}
223	}
224	}
225
226	return fetchStations(SQL, new LatlongSetter() );
227	}
228
229	public StationBean getByLocation(double latitude, double longitude) throws SQLException {
230	StationBean result = getByLocationWorker(latitude, longitude, true);
231
232	if (result.entries.size() < LOCATION_LIMIT) { //failover
233	logger.info("getByLocation failover: " +latitude + "," + longitude);
234
235	result = getByLocationWorker(latitude, longitude, false);
236	}
237
238	return result;
239	}
240
241
242
243	public StationBean getByList(String list) throws SQLException {
244	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0,aliases,tritstation " +
245	"FROM trainstations " +
246	"WHERE id IN " + list + " AND enabled = true " +
247	"ORDER BY name ";
248
249	return fetchStations(SQL, new NullSetter() );
250	}
251
252
253
254	public StationEntry getSimpleByName(final String name) throws SQLException {
255	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
256	"FROM trainstations " +
257	"WHERE name = ? AND enabled = true " +
258	"LIMIT 1 ";
259
260	class NameSetter implements StatementParamSetter {
261	@Override
262	public void setParams(PreparedStatement stmt) throws SQLException {
263	stmt.setString(1, name );
264	}
265	}
266
267	StationBean stations = fetchStations(SQL, new NameSetter() );
268
269	if (stations.entries.size() == 1) {
270	return stations.entries.get(0);
271	} else {
272	return null;
273	}
274	}
275
276	Comparator<StationEntry> nameComparator = new Comparator<StationEntry>() {
277	@Override
278	public int compare(StationEntry arg0, StationEntry arg1) {
279	return arg0.getName().compareTo( arg1.getName() );
280	}
281	};
282
283	//used to create full dump in order to populate Google Appengine DB
284	//after 1.1.0 also used to populate client-side station list
285	public StationBean dumpAll() throws SQLException {
286
287	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
288	"FROM trainstations WHERE enabled = true";
289
290
291	StationBean stations = fetchStations(SQL, new NullSetter() );
292	Collections.sort( stations.entries,nameComparator );
293
294	return stations;
295
296	/*
297	Connection conn = null;
298	Statement stmt = null;
299	ResultSet res = null;
300
301
302	try {
303	conn = DBConnection.getConnection();
304
305	stmt = conn.createStatement();
306	res = stmt.executeQuery(SQL);
307
308	// Does mostly the same as convertResultset()
309	StationBean stations = new StationBean();
310	while (res.next()) {
311	StationEntry entry = convertSingleRow(res);
312
313	Array arr = res.getArray(10);
314	if (arr != null) {
315	String[] aliases = (String[]) arr.getArray();
316	entry.setAliases(aliases);
317	}
318
319	stations.entries.add( entry );
320
321	}
322	Collections.sort( stations.entries,nameComparator );
323	return stations;
324
325
326	} finally {
327	if (res != null)
328	res.close();
329	if (stmt != null)
330	stmt.close();
331	if (conn != null)
332	conn.close();
333	}*/
334
335	}
336
337	/*
338	@Deprecated
339	public static String getStationName(int stationID) {
340	String station = "";
341
342	Connection conn = null;
343	try {
344	conn = DBConnection.getConnection();
345	Statement stmt = conn.createStatement();
346	ResultSet rs = stmt.executeQuery("SELECT name FROM trainstations WHERE id=" + stationID);
347	if (rs.next()) {
348	station = rs.getString(1);
349	}
350
351	} catch (Exception e) {
352	} finally {
353	try {
354	if (conn != null && !conn.isClosed())
355	conn.close();
356	} catch (Exception e) {}
357	}
358
359	return station;
360	}*/
361
362	public boolean hasDisabledStation(final String name) throws SQLException {
363	String SQL = "Select count(*) as antal from trainstations where name = '" + name + "' and enabled=false " ;
364
365	Connection conn = DBConnection.getConnection();
366	Statement stmt = conn.createStatement();
367	ResultSet rs = stmt.executeQuery( SQL );
368
369	rs.next();
370
371	int antal = rs.getInt(1);
372
373	rs.close();
374	stmt.close();
375	conn.close();
376
377	return (antal > 0);
378	}
379
380	/*
381	@Deprecated
382	public int getIdByName(final String name) throws SQLException {
383	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +
384	"FROM trainstations " +
385	"WHERE name = ? AND enabled = true " +
386	"LIMIT 1 ";
387
388	class NameSetter implements StatementParamSetter {
389	@Override
390	public void setParams(PreparedStatement stmt) throws SQLException {
391	stmt.setString(1, name );
392	}
393	}
394
395	StationBean stations = fetchStations(SQL, new NameSetter() );
396
397	if (stations.entries.size() == 1) {
398	return stations.entries.get(0).getId();
399	} else {
400	return -1;
401	}
402	}*/
403	}