Subversion Repositories mkgmap

/*
 * Copyright (C) 2008 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: 07-Dec-2008
 */
package uk.me.parabola.mkgmap.osmstyle.eval;

import java.util.HashMap;
import java.util.Map;

/**
 * Converting quantities from one unit to another.
 *
 * TODO: this will probably change a lot.
 *
 * @author Steve Ratcliffe
 */
public class UnitConversions {
        private static final Map<String, Double> conversions = new HashMap<String, Double>();

        // Initially we are just supporting the existing case for contour
        // lines where we convert to feet.
        static {
                Map<String, Double> m = conversions;
                m.put("m=>ft", 3.2808399);
        }
        //
        //private double factor;
        //
        //public double convert(double in) {
        //      return in * factor;
        //}

        /**
         * Get the conversion factor for the given conversion.
         * @param code A string such as 'm=>ft' which would mean meters
         * to feet.
         * @return The factor required to convert the first to the second.
         */
        public static double convertFactor(String code) {
                Double f = conversions.get(code);
                return (f == null)?1 :f;
        }
}