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

import uk.me.parabola.mkgmap.osmstyle.eval.Op;
import uk.me.parabola.mkgmap.reader.osm.Element;
import uk.me.parabola.mkgmap.reader.osm.GType;
import uk.me.parabola.mkgmap.reader.osm.Rule;
import uk.me.parabola.mkgmap.reader.osm.TypeResult;

/**
 * A rule that contains a condition.  If the condition is matched by the
 * element then the held gtype is returned.
 *
 * @author Steve Ratcliffe
 */
public class ExpressionRule implements Rule {
        private final Op expression;
        private final GType gtype;

        public ExpressionRule(Op expression, GType gtype) {
                this.expression = expression;
                this.gtype = gtype;
        }

        public void resolveType(Element el, TypeResult result) {
                if (expression.eval(el))
                        result.add(el, gtype);
        }

        public String toString() {
                return expression.toString() + ' ' + gtype;
        }
}