/[projects]/android/TrainInfoService/src/dk/thoerup/traininfoservice/db/StationDAO.java
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Diff of /android/TrainInfoService/src/dk/thoerup/traininfoservice/db/StationDAO.java

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revision 1506 by torben, Wed Jun 8 15:45:41 2011 UTC revision 1507 by torben, Wed Jun 8 16:11:27 2011 UTC
# Line 105  public class StationDAO { Line 105  public class StationDAO {
105           *     'select $2 ilike $1' language sql strict immutable;           *     'select $2 ilike $1' language sql strict immutable;
106           *     create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);           *     create operator ~~~ (procedure = rlike, leftarg = text, rightarg = text, commutator = ~~);
107           */           */
108          public StationBean getByName(final String name) throws SQLException {          public StationBean getByNameNormal(final String name) throws SQLException {
109                  String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +                  String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0 " +
110                  "FROM trainstations " +                  "FROM trainstations " +
111                  "WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +                  "WHERE (name ILIKE ? OR ? ~~~ ANY(aliases)) AND enabled = true " +
# Line 121  public class StationDAO { Line 121  public class StationDAO {
121                                    
122                  return fetchStations(SQL, new NameSetter() );                  return fetchStations(SQL, new NameSetter() );
123          }          }
124            
125            
126            public StationBean getByNameFuzzy(final String name) throws SQLException {
127                    String SQL = "SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, " +
128                    "levenshtein(lower(name),lower(?) ) as leven " +
129                    "FROM trainstations " +
130                    "WHERE (levenshtein(lower(name),lower(?) ) <= 3) AND enabled = true " +
131                    "AND  enabled = true " +
132                    "ORDER BY leven " +
133                    "LIMIT 1";
134    
135                    class NameSetter implements StatementParamSetter {
136                            @Override
137                            public void setParams(PreparedStatement stmt) throws SQLException {
138                                    stmt.setString(1, name );
139                                    stmt.setString(2, name );
140                            }                      
141                    }
142                    
143                    StationBean stations = fetchStations(SQL, new NameSetter() );
144                    stations.fuzzystrmatch = true;
145                    return stations;
146            }
147            
148            public StationBean getByName(final String name) throws SQLException {
149                    StationBean stations = getByNameNormal(name);
150                    
151                    if (stations.entries.size() == 0) {
152                            logger.info("getByName failover: " + name);
153                            stations = getByNameFuzzy(name);
154                    }
155                    return stations;
156            }
157            
158            
159    
160          //Latitude (horizonal), longitude(vertical) so          //Latitude (horizonal), longitude(vertical) so
161          // 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same          // 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same
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