124 |
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125 |
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126 |
public StationBean getByNameFuzzy(final String name) throws SQLException { |
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, " + |
String SQL = "SELECT * FROM (" + |
128 |
"levenshtein(lower(name),lower(?) ) as leven " + |
" SELECT id,name,latitude,longitude,stationcode_fjrn,stationcode_stog, stationcode_metro, address, 0.0, " + |
129 |
"FROM trainstations " + |
" levenshtein(lower(name),lower(?) ) as leven " + |
130 |
"WHERE (levenshtein(lower(name),lower(?) ) <= 3) " + |
" FROM trainstations " + |
131 |
"AND enabled = true " + |
" WHERE enabled = true ) as lev2 " + |
132 |
"ORDER BY leven " + |
"WHERE (leven <= 3) " + |
133 |
"LIMIT 1"; |
"ORDER BY leven " + |
134 |
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"LIMIT 1"; |
135 |
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136 |
class NameSetter implements StatementParamSetter { |
class NameSetter implements StatementParamSetter { |
137 |
@Override |
@Override |
138 |
public void setParams(PreparedStatement stmt) throws SQLException { |
public void setParams(PreparedStatement stmt) throws SQLException { |
139 |
stmt.setString(1, name ); |
stmt.setString(1, name ); |
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stmt.setString(2, name ); |
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140 |
} |
} |
141 |
} |
} |
142 |
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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 |
162 |
// 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles. |
// 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles. |
163 |
// the "hack" with max 0.4 degrees latitude and 0.75 degrees longitude is only valid since we only service danish trains, |
// so 1 degree longitude is 64.5 km at denmarks southern point (gedser=54.55,11.95) |
164 |
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// and is 59.4km at northern point (skagen = 57.75,10.65) |
165 |
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// The "hack" with max 0.4 degrees latitude and 0.75 degrees longitude is only valid since we only service danish trains, |
166 |
// in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km |
// in denmark 0.4dg latitude ~ 44km, 0.75dg longitude ~ 47km |
167 |
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168 |
// the ultra fast method (and only slightly inaccurate as long as we only cover a limited geographically area) |
// the ultra fast method (and only slightly inaccurate as long as we only cover a limited geographically area) |