de.codesourcery.geoip.Coordinate.java Source code

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Here is the source code for de.codesourcery.geoip.Coordinate.java

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/**
 * Copyright 2012 Tobias Gierke <tobias.gierke@code-sourcery.de>
 *
 * 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 de.codesourcery.geoip;

import org.json.JSONObject;
import org.json.JSONWriter;

/**
 * A coordinate in degrees latitude/longitude.
 * 
 * @author tobias.gierke@code-sourcery.de
 */
public final class Coordinate {
    public static final Coordinate ZERO = new Coordinate(0, 0);

    public final double longitudeInDeg;
    public final double latitudeInDeg;

    public Coordinate(double latitudeInDeg, double longitudeInDeg) {
        this.longitudeInDeg = longitudeInDeg;
        this.latitudeInDeg = latitudeInDeg;
    }

    public JSONWriter toJSON(JSONWriter writer) {
        writer.object().key("lat").value(latitudeInDeg).key("long").value(longitudeInDeg).endObject();
        return writer;
    }

    public static Coordinate fromJSON(JSONObject object) {
        return new Coordinate(object.getDouble("lat"), object.getDouble("long"));
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        long temp;
        temp = Double.doubleToLongBits(latitudeInDeg);
        result = prime * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(longitudeInDeg);
        result = prime * result + (int) (temp ^ (temp >>> 32));
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Coordinate other = (Coordinate) obj;
        if (Double.doubleToLongBits(latitudeInDeg) != Double.doubleToLongBits(other.latitudeInDeg))
            return false;
        if (Double.doubleToLongBits(longitudeInDeg) != Double.doubleToLongBits(other.longitudeInDeg))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "lat=" + latitudeInDeg + " , long=" + longitudeInDeg;
    }

    public double longitudeInRad() {
        return Math.toRadians(longitudeInDeg);
    }

    public double latitudeInRad() {
        return Math.toRadians(latitudeInDeg);
    }
}