/*
* 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 com.spatial4j.core.shape.impl;
import com.spatial4j.core.context.SpatialContext;
import com.spatial4j.core.shape.Circle;
import com.spatial4j.core.shape.Point;
import com.spatial4j.core.shape.Rectangle;
import com.spatial4j.core.shape.Shape;
import com.spatial4j.core.shape.SpatialRelation;
/** A basic 2D implementation of a Point. */
public class PointImpl implements Point {
private final SpatialContext ctx;
private double x;
private double y;
/** A simple constructor without normalization / validation. */
public PointImpl(double x, double y, SpatialContext ctx) {
this.ctx = ctx;
reset(x, y);
}
@Override
public boolean isEmpty() {
return Double.isNaN(x);
}
@Override
public void reset(double x, double y) {
assert ! isEmpty();
this.x = x;
this.y = y;
}
@Override
public double getX() {
return x;
}
@Override
public double getY() {
return y;
}
@Override
public Rectangle getBoundingBox() {
return ctx.makeRectangle(this, this);
}
@Override
public PointImpl getCenter() {
return this;
}
@Override
public Circle getBuffered(double distance, SpatialContext ctx) {
return ctx.makeCircle(this, distance);
}
@Override
public SpatialRelation relate(Shape other) {
if (isEmpty() || other.isEmpty())
return SpatialRelation.DISJOINT;
if (other instanceof Point)
return this.equals(other) ? SpatialRelation.INTERSECTS : SpatialRelation.DISJOINT;
return other.relate(this).transpose();
}
@Override
public boolean hasArea() {
return false;
}
@Override
public double getArea(SpatialContext ctx) {
return 0;
}
@Override
public String toString() {
return "Pt(x="+x+",y="+y+")";
}
@Override
public boolean equals(Object o) {
return equals(this,o);
}
/**
* All {@link Point} implementations should use this definition of {@link Object#equals(Object)}.
*/
public static boolean equals(Point thiz, Object o) {
assert thiz != null;
if (thiz == o) return true;
if (!(o instanceof Point)) return false;
Point point = (Point) o;
if (Double.compare(point.getX(), thiz.getX()) != 0) return false;
if (Double.compare(point.getY(), thiz.getY()) != 0) return false;
return true;
}
@Override
public int hashCode() {
return hashCode(this);
}
/**
* All {@link Point} implementations should use this definition of {@link Object#hashCode()}.
*/
public static int hashCode(Point thiz) {
int result;
long temp;
temp = thiz.getX() != +0.0d ? Double.doubleToLongBits(thiz.getX()) : 0L;
result = (int) (temp ^ (temp >>> 32));
temp = thiz.getY() != +0.0d ? Double.doubleToLongBits(thiz.getY()) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
return result;
}
}