lucene/spatial-extras/src/java/org/apache/lucene/spatial/spatial4j/Geo3dCircleShape.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.lucene.spatial.spatial4j;

import org.apache.lucene.spatial3d.geom.GeoCircle;
import org.apache.lucene.spatial3d.geom.GeoCircleFactory;
import org.apache.lucene.spatial3d.geom.GeoPointShapeFactory;
import org.locationtech.spatial4j.context.SpatialContext;
import org.locationtech.spatial4j.distance.DistanceUtils;
import org.locationtech.spatial4j.shape.Circle;
import org.locationtech.spatial4j.shape.Point;

/**
 * Specialization of a {@link Geo3dShape} which represents a {@link Circle}.
 *
 * @lucene.experimental
 */
public class Geo3dCircleShape extends Geo3dShape<GeoCircle> implements Circle {

  public Geo3dCircleShape(final GeoCircle shape, final SpatialContext spatialcontext) {
    super(shape, spatialcontext);
  }

  @Override
  public void reset(double x, double y, double radiusDEG) {
    shape = GeoCircleFactory.makeGeoCircle(shape.getPlanetModel(),
        y * DistanceUtils.DEGREES_TO_RADIANS,
        x * DistanceUtils.DEGREES_TO_RADIANS,
        radiusDEG * DistanceUtils.DEGREES_TO_RADIANS);
    center = null;
    boundingBox = null;
  }

  @Override
  public double getRadius() {
    return shape.getRadius() * DistanceUtils.RADIANS_TO_DEGREES;
  }

  @Override
  public Point getCenter() {
    Point center = this.center;//volatile read once
    if (center == null) {
      center = new Geo3dPointShape(
          GeoPointShapeFactory.makeGeoPointShape(shape.getPlanetModel(),
              shape.getCenter().getLatitude(),
              shape.getCenter().getLongitude()),
          spatialcontext);
      this.center = center;
    }
    return center;
  }
}