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: 03-Nov-2008
 */
package uk.me.parabola.mkgmap.osmstyle.eval;

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

/**
 * Holds tag=value relationship.
 *
 * @author Steve Ratcliffe
 */
public class EqualsOp extends AbstractBinaryOp {
        private String key;
        private String value;

        public EqualsOp() {
                setType(EQUALS);
        }

        public void setFirst(Op first) {
                super.setFirst(first);
                key = first.value();
        }

        public void setSecond(Op second) {
                super.setSecond(second);
                value = second.value();
        }

        public boolean eval(Element el) {
                String s = el.getTag(key);
                if (s == null)
                        return false;
                return s.equals(value);
        }

        public int priority() {
                return 10;
        }

        public String value() {
                return key + '=' + value;
        }
}