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	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	station.setTritStation( res.getInt(11) );
60	if (res.wasNull())
61	station.setTritStation( -1 );
62
63	return station;
64	}
65
66	private StationBean convertResultset(ResultSet res) throws SQLException {
67	StationBean stations = new StationBean();
68	while (res.next()) {
69	stations.entries.add( convertSingleRow(res) );
70	}
71	return stations;
72
73	}
74
75	private StationBean fetchStations(String SQL, StatementParamSetter setter) throws SQLException {
76	StationBean stations;
77	Connection conn = null;
78	PreparedStatement stmt = null;
79	ResultSet res = null;
80	try {
81	conn = DBConnection.getConnection();
82	stmt = conn.prepareStatement(SQL);
83
84	setter.setParams(stmt);
85
86	res = stmt.executeQuery();
87	stations = convertResultset(res);
88
89	} finally {
90	if (res != null)
91	res.close();
92	if (stmt != null)
93	stmt.close();
94	if (conn!= null)
95	conn.close();
96	}
97	return stations;
98
99	}
100
101	public StationEntry getById(int id) throws SQLException,NostationException {
102	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
103	"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	}
113
114
115
116	/*
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	* create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);
121	*/
122	public StationBean getByNameNormal(final String name) throws SQLException {
123	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
124	"FROM trainstations " +
125	"WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +
126	"ORDER BY name ";
127
128	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	}
135
136	return fetchStations(SQL, new NameSetter() );
137	}
138
139
140	public StationBean getByNameFuzzy(final String name) throws SQLException {
141	String SQL = "SELECT * FROM (" +
142	" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, aliases, tritstation, " +
143	" 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
150	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	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	public StationBean getByName(String name) throws SQLException {
171	name = removeSuffix(name, " st.");
172	name = removeSuffix(name, " st");
173	name = removeSuffix(name, " station");
174
175	StationBean stations = getByNameNormal(name);
176
177	if (stations.entries.size() == 0) {
178	stations = getByNameFuzzy(name);
179
180	logger.info("getByName failover: " + name + "(" + (stations.entries.size() >0) + ")" );
181	}
182	return stations;
183	}
184
185
186
187	//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	// 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	// in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km
194
195	// 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	// sqrt( power(abs(latitude-?)111320, 2) + power(abs(longitude-?)63000,2) )::int as calcdist
199
200	public StationBean getByLocationWorker(final double latitude, final double longitude, final boolean geolimit) throws SQLException {
201
202	String limitExpression = (geolimit == true) ? "AND abs(latitude-?)<0.4 AND abs(longitude-?)<0.75 " : "";
203
204	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, " +
205	"earth_distance( earth_coord, ll_to_earth(?,?))::int AS calcdist,aliases,tritstation " +
206	"FROM trainstations " +
207	"WHERE enabled = true " + limitExpression +
208	"ORDER BY calcdist ASC " +
209	"LIMIT " + LOCATION_LIMIT;
210
211
212	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
224	return fetchStations(SQL, new LatlongSetter() );
225	}
226
227	public StationBean getByLocation(double latitude, double longitude) throws SQLException {
228	StationBean result = getByLocationWorker(latitude, longitude, true);
229
230	if (result.entries.size() < LOCATION_LIMIT) { //failover
231	logger.info("getByLocation failover: " +latitude + "," + longitude);
232
233	result = getByLocationWorker(latitude, longitude, false);
234	}
235
236	return result;
237	}
238
239
240
241	public StationBean getByList(String list) throws SQLException {
242	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro, address,0.0,aliases,tritstation " +
243	"FROM trainstations " +
244	"WHERE id IN " + list + " AND enabled = true " +
245	"ORDER BY name ";
246
247	return fetchStations(SQL, new NullSetter() );
248	}
249
250
251
252	public StationEntry getSimpleByName(final String name) throws SQLException {
253	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0,aliases,tritstation " +
254	"FROM trainstations " +
255	"WHERE name = ? AND enabled = true " +
256	"LIMIT 1 ";
257
258	class NameSetter implements StatementParamSetter {
259	@Override
260	public void setParams(PreparedStatement stmt) throws SQLException {
261	stmt.setString(1, name );
262	}
263	}
264
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
274	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	//used to create full dump in order to populate Google Appengine DB
282	//after 1.1.0 also used to populate client-side station list
283	public StationBean dumpAll() throws SQLException {
284
285	String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog,stationcode_metro,address,0.0,aliases,tritstation " +
286	"FROM trainstations WHERE enabled = true";
287
288
289	StationBean stations = fetchStations(SQL, new NullSetter() );
290	Collections.sort( stations.entries,nameComparator );
291
292	return stations;
293
294	/*
295	Connection conn = null;
296	Statement stmt = null;
297	ResultSet res = null;
298
299
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	Collections.sort( stations.entries,nameComparator );
321	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	}*/
332
333	}
334
335	/*
336	@Deprecated
337	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	try {
352	if (conn != null && !conn.isClosed())
353	conn.close();
354	} catch (Exception e) {}
355	}
356
357	return station;
358	}*/
359
360	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
378	/*
379	@Deprecated
380	public int getIdByName(final String name) throws SQLException {
381	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
386	class NameSetter implements StatementParamSetter {
387	@Override
388	public void setParams(PreparedStatement stmt) throws SQLException {
389	stmt.setString(1, name );
390	}
391	}
392
393	StationBean stations = fetchStations(SQL, new NameSetter() );
394
395	if (stations.entries.size() == 1) {
396	return stations.entries.get(0).getId();
397	} else {
398	return -1;
399	}
400	}*/
401	}