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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.builders;
import com.spatial4j.core.shape.Circle;
import com.vividsolutions.jts.geom.Coordinate;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.common.unit.DistanceUnit.Distance;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Objects;
public class CircleBuilder extends ShapeBuilder {
public static final String FIELD_RADIUS = "radius";
public static final GeoShapeType TYPE = GeoShapeType.CIRCLE;
public static final CircleBuilder PROTOTYPE = new CircleBuilder();
private DistanceUnit unit;
private double radius;
private Coordinate center;
/**
* Set the center of the circle
*
* @param center coordinate of the circles center
* @return this
*/
public CircleBuilder center(Coordinate center) {
this.center = center;
return this;
}
/**
* set the center of the circle
* @param lon longitude of the center
* @param lat latitude of the center
* @return this
*/
public CircleBuilder center(double lon, double lat) {
return center(new Coordinate(lon, lat));
}
/**
* Get the center of the circle
*/
public Coordinate center() {
return center;
}
/**
* Set the radius of the circle. The String value will be parsed by {@link DistanceUnit}
* @param radius Value and unit of the circle combined in a string
* @return this
*/
public CircleBuilder radius(String radius) {
return radius(DistanceUnit.Distance.parseDistance(radius));
}
/**
* Set the radius of the circle
* @param radius radius of the circle (see {@link org.elasticsearch.common.unit.DistanceUnit.Distance})
* @return this
*/
public CircleBuilder radius(Distance radius) {
return radius(radius.value, radius.unit);
}
/**
* Set the radius of the circle
* @param radius value of the circles radius
* @param unit unit name of the radius value (see {@link DistanceUnit})
* @return this
*/
public CircleBuilder radius(double radius, String unit) {
return radius(radius, DistanceUnit.fromString(unit));
}
/**
* Set the radius of the circle
* @param radius value of the circles radius
* @param unit unit of the radius value (see {@link DistanceUnit})
* @return this
*/
public CircleBuilder radius(double radius, DistanceUnit unit) {
this.unit = unit;
this.radius = radius;
return this;
}
/**
* Get the radius of the circle without unit
*/
public double radius() {
return this.radius;
}
/**
* Get the radius unit of the circle
*/
public DistanceUnit unit() {
return this.unit;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.field(FIELD_TYPE, TYPE.shapeName());
builder.field(FIELD_RADIUS, unit.toString(radius));
builder.field(FIELD_COORDINATES);
toXContent(builder, center);
return builder.endObject();
}
@Override
public Circle build() {
return SPATIAL_CONTEXT.makeCircle(center.x, center.y, 360 * radius / unit.getEarthCircumference());
}
@Override
public GeoShapeType type() {
return TYPE;
}
@Override
public int hashCode() {
return Objects.hash(center, radius, unit.ordinal());
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
CircleBuilder other = (CircleBuilder) obj;
return Objects.equals(center, other.center) &&
Objects.equals(radius, other.radius) &&
Objects.equals(unit.ordinal(), other.unit.ordinal());
}
@Override
public void writeTo(StreamOutput out) throws IOException {
writeCoordinateTo(center, out);
out.writeDouble(radius);
DistanceUnit.writeDistanceUnit(out, unit);
}
@Override
public CircleBuilder readFrom(StreamInput in) throws IOException {
return new CircleBuilder()
.center(readCoordinateFrom(in))
.radius(in.readDouble(), DistanceUnit.readDistanceUnit(in));
}
}
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