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: 02-Dec-2008
 */
package uk.me.parabola.mkgmap.osmstyle.actions;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

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

/**
 * Set the name on the given element.  The tags of the element may be
 * used in setting the name.
 *
 * We have a list of possible substitutions.
 *
 * @author Steve Ratcliffe
 */
public class NameAction implements Action {

        private final List<ValueBuilder> names = new ArrayList<ValueBuilder>();

        /**
         * search for the first matching name pattern and set the element name
         * to it.
         *
         * If the element name is already set, then nothing is done.
         *
         * @param el The element on which the name may be set.
         */
        public void perform(Element el) {
                if (el.getName() != null)
                        return;
               
                for (ValueBuilder vb : names) {
                        String s = vb.build(el, el);
                        if (s != null) {
                                el.setName(s);
                                break;
                        }
                }
        }

        public void add(String val) {
                names.add(new ValueBuilder(val));
        }

        public Set<String> getUsedTags() {
                Set<String> set = new HashSet<String>();
                if (names != null) {
                        for (ValueBuilder vb : names) {
                                set.addAll(vb.getUsedTags());
                        }
                }
                return set;
        }

        public String toString() {
                StringBuilder sb = new  StringBuilder();
                sb.append("name ");
                for (ValueBuilder vb : names) {
                        sb.append(vb);
                        sb.append(" | ");
                }
                sb.setLength(sb.length() - 1);
                return sb.toString();
        }
}