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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.common.geo;
import org.apache.lucene.document.LatLonDocValuesField;
import org.apache.lucene.document.LatLonPoint;
import org.apache.lucene.geo.GeoEncodingUtils;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.util.BitUtil;
import org.apache.lucene.util.BytesRef;
import java.util.Arrays;
import static org.elasticsearch.common.geo.GeoHashUtils.mortonEncode;
import static org.elasticsearch.common.geo.GeoHashUtils.stringEncode;
public final class GeoPoint {
private double lat;
private double lon;
public GeoPoint() {
}
/**
* Create a new Geopoint from a string. This String must either be a geohash
* or a lat-lon tuple.
*
* @param value String to create the point from
*/
public GeoPoint(String value) {
this.resetFromString(value);
}
public GeoPoint(double lat, double lon) {
this.lat = lat;
this.lon = lon;
}
public GeoPoint(GeoPoint template) {
this(template.getLat(), template.getLon());
}
public GeoPoint reset(double lat, double lon) {
this.lat = lat;
this.lon = lon;
return this;
}
public GeoPoint resetLat(double lat) {
this.lat = lat;
return this;
}
public GeoPoint resetLon(double lon) {
this.lon = lon;
return this;
}
public GeoPoint resetFromString(String value) {
int comma = value.indexOf(',');
if (comma != -1) {
lat = Double.parseDouble(value.substring(0, comma).trim());
lon = Double.parseDouble(value.substring(comma + 1).trim());
} else {
resetFromGeoHash(value);
}
return this;
}
public GeoPoint resetFromIndexHash(long hash) {
lon = GeoHashUtils.decodeLongitude(hash);
lat = GeoHashUtils.decodeLatitude(hash);
return this;
}
// todo this is a crutch because LatLonPoint doesn't have a helper for returning .stringValue()
// todo remove with next release of lucene
public GeoPoint resetFromIndexableField(IndexableField field) {
if (field instanceof LatLonPoint) {
BytesRef br = field.binaryValue();
byte[] bytes = Arrays.copyOfRange(br.bytes, br.offset, br.length);
return this.reset(
GeoEncodingUtils.decodeLatitude(bytes, 0),
GeoEncodingUtils.decodeLongitude(bytes, Integer.BYTES));
} else if (field instanceof LatLonDocValuesField) {
long encoded = (long)(field.numericValue());
return this.reset(
GeoEncodingUtils.decodeLatitude((int)(encoded >>> 32)),
GeoEncodingUtils.decodeLongitude((int)encoded));
}
return resetFromIndexHash(Long.parseLong(field.stringValue()));
}
public GeoPoint resetFromGeoHash(String geohash) {
final long hash = mortonEncode(geohash);
return this.reset(GeoHashUtils.decodeLatitude(hash), GeoHashUtils.decodeLongitude(hash));
}
public GeoPoint resetFromGeoHash(long geohashLong) {
final int level = (int)(12 - (geohashLong&15));
return this.resetFromIndexHash(BitUtil.flipFlop((geohashLong >>> 4) << ((level * 5) + 2)));
}
public double lat() {
return this.lat;
}
public double getLat() {
return this.lat;
}
public double lon() {
return this.lon;
}
public double getLon() {
return this.lon;
}
public String geohash() {
return stringEncode(lon, lat);
}
public String getGeohash() {
return stringEncode(lon, lat);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
GeoPoint geoPoint = (GeoPoint) o;
if (Double.compare(geoPoint.lat, lat) != 0) return false;
if (Double.compare(geoPoint.lon, lon) != 0) return false;
return true;
}
@Override
public int hashCode() {
int result;
long temp;
temp = lat != +0.0d ? Double.doubleToLongBits(lat) : 0L;
result = Long.hashCode(temp);
temp = lon != +0.0d ? Double.doubleToLongBits(lon) : 0L;
result = 31 * result + Long.hashCode(temp);
return result;
}
@Override
public String toString() {
return lat + ", " + lon;
}
public static GeoPoint parseFromLatLon(String latLon) {
GeoPoint point = new GeoPoint(latLon);
return point;
}
public static GeoPoint fromGeohash(String geohash) {
return new GeoPoint().resetFromGeoHash(geohash);
}
public static GeoPoint fromGeohash(long geohashLong) {
return new GeoPoint().resetFromGeoHash(geohashLong);
}
}
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