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add option to reuse double[] when decoding geohash

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This commit is contained in:
kimchy 2010-10-07 23:58:49 +02:00
parent 0f6beeb263
commit a61f3a939b
1 changed files with 8 additions and 6 deletions
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14
modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/geo/GeoHashUtils.java
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@ -112,13 +112,17 @@ public class GeoHashUtils {
return geohash.toString();
}
public static double[] decode(String geohash) {
return decode(geohash, new double[2]);
}
/**
* Decodes the given geohash into a latitude and longitude
*
* @param geohash Geohash to deocde
* @return Array with the latitude at index 0, and longitude at index 1
*/
public static double[] decode(String geohash) {
public static double[] decode(String geohash, double[] ret) {
// double[] latInterval = {-90.0, 90.0};
// double[] lngInterval = {-180.0, 180.0};
double latInterval0 = -90.0;
@ -128,8 +132,6 @@ public class GeoHashUtils {
boolean isEven = true;
double latitude;
double longitude;
for (int i = 0; i < geohash.length(); i++) {
final int cd = DECODE_MAP.get(geohash.charAt(i));
@ -156,10 +158,10 @@ public class GeoHashUtils {
}
// latitude = (latInterval[0] + latInterval[1]) / 2D;
latitude = (latInterval0 + latInterval1) / 2D;
ret[0] = (latInterval0 + latInterval1) / 2D;
// longitude = (lngInterval[0] + lngInterval[1]) / 2D;
longitude = (lngInterval0 + lngInterval1) / 2D;
ret[1] = (lngInterval0 + lngInterval1) / 2D;
return new double[]{latitude, longitude};
return ret;
}
}