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/*
 * Copyright (C) 2012.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 or
 * 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.
 */


package uk.me.parabola.mkgmap.osmstyle.function;

import uk.me.parabola.mkgmap.reader.osm.Element;
/*
 * Copyright (C) 2012.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 or
 * 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.
 */


import uk.me.parabola.mkgmap.reader.osm.Way;

/**
 * Checks if a way is closed.
 * @author WanMil
 */

public class IsClosedFunction extends StyleFunction {

        public IsClosedFunction() {
                super(null);
        }

        public boolean supportsWay() {
                return true;
        }
       
        public String value(Element el) {
                if (el instanceof Way) {
                        Way w = (Way) el;
                        return String.valueOf((w.getPoints().size() > 2 && w.hasIdenticalEndPoints()));
                }
                return null;
        }

        public String getName() {
                return "is_closed";
        }
}