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/*
* Copyright 2016 - 2020 Anton Tananaev (anton@traccar.org)
*
* Licensed 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.traccar.geofence;
import java.text.DecimalFormat;
import java.text.ParseException;
import org.traccar.helper.DistanceCalculator;
public class GeofenceCircle extends GeofenceGeometry {
private double centerLatitude;
private double centerLongitude;
private double radius;
public GeofenceCircle() {
}
public GeofenceCircle(String wkt) throws ParseException {
fromWkt(wkt);
}
public GeofenceCircle(double latitude, double longitude, double radius) {
this.centerLatitude = latitude;
this.centerLongitude = longitude;
this.radius = radius;
}
public double distanceFromCenter(double latitude, double longitude) {
return DistanceCalculator.distance(centerLatitude, centerLongitude, latitude, longitude);
}
@Override
public boolean containsPoint(double latitude, double longitude) {
return distanceFromCenter(latitude, longitude) <= radius;
}
@Override
public double calculateArea() {
return Math.PI * radius * radius;
}
@Override
public String toWkt() {
String wkt;
wkt = "CIRCLE (";
wkt += String.valueOf(centerLatitude);
wkt += " ";
wkt += String.valueOf(centerLongitude);
wkt += ", ";
DecimalFormat format = new DecimalFormat("0.#");
wkt += format.format(radius);
wkt += ")";
return wkt;
}
@Override
public void fromWkt(String wkt) throws ParseException {
if (!wkt.startsWith("CIRCLE")) {
throw new ParseException("Mismatch geometry type", 0);
}
String content = wkt.substring(wkt.indexOf("(") + 1, wkt.indexOf(")"));
if (content.equals("")) {
throw new ParseException("No content", 0);
}
String[] commaTokens = content.split(",");
if (commaTokens.length != 2) {
throw new ParseException("Not valid content", 0);
}
String[] tokens = commaTokens[0].split("\\s");
if (tokens.length != 2) {
throw new ParseException("Too much or less coordinates", 0);
}
try {
centerLatitude = Double.parseDouble(tokens[0]);
} catch (NumberFormatException e) {
throw new ParseException(tokens[0] + " is not a double", 0);
}
try {
centerLongitude = Double.parseDouble(tokens[1]);
} catch (NumberFormatException e) {
throw new ParseException(tokens[1] + " is not a double", 0);
}
try {
radius = Double.parseDouble(commaTokens[1]);
} catch (NumberFormatException e) {
throw new ParseException(commaTokens[1] + " is not a double", 0);
}
}
}
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