Subversion Repositories mkgmap

/*
 * Copyright (C) 2011.
 *
 * 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.imgfmt.app.mdr;

import java.text.Collator;
import java.util.ArrayList;
import java.util.List;

/**
 * This is a list of streets that belong to each city.
 *
 * It is sorted with each group of streets that belong to a city in the same
 * order as the cities, within each group the sort is by street id in mdr7.
 *
 * Streets that do not have an associated city are not included.
 *
 * There is a subsection in the mdr1 reverse index for this section, however
 * the map index is not saved as part of this record.
 *
 * @author Steve Ratcliffe
 */
public class Mdr20 extends Mdr2x {

        public Mdr20(MdrConfig config) {
                setConfig(config);
        }

        /**
         * We need to sort the streets by the name of the city. Within a city
         * group the streets are ordered by their own index.
         *
         * Also have to set the record number of the first record in this section
         * on the city.
         *
         * @param inStreets The list of streets from mdr7, must have Mdr7.index set
         * @param list
         */
        public void buildFromStreets(List<Mdr7Record> inStreets) {
                ArrayList<Mdr7Record> sorted = new ArrayList<>(inStreets);
                sorted.sort((o1, o2) -> {
                        int d = Integer.compare(o1.getCity().getMdr20SortPos(), o2.getCity().getMdr20SortPos());
                        if (d != 0)
                                return d;
                        return Integer.compare(o1.getIndex(), o2.getIndex());
                });

                Collator collator = getConfig().getSort().getCollator();
                collator.setStrength(Collator.SECONDARY);
               
                Mdr5Record lastCity = null;
                Mdr7Record lastStreet = null;
                int record = 0;
                int cityRecord = 1;
               
                for (Mdr7Record street : sorted) {
                        Mdr5Record city = street.getCity();
                        boolean citySameByName = lastCity != null && city.getMdr20SortPos() == lastCity.getMdr20SortPos();
                        int rr = street.checkRepeat(lastStreet, collator);
                        // Only save a single copy of each street name.
                        if (!citySameByName || rr != 3 || lastStreet.getIndex() != street.getIndex()) {
                                record++;
                                streets.add(street);
                        }

                        // The mdr20 value changes for each new city name
                        if (citySameByName) {
                                assert cityRecord!=0;
                                city.setMdr20(cityRecord);
                        } else {
                                // New city name, this marks the start of a new section in mdr20
                                assert cityRecord != 0;
                                cityRecord = record;
                                city.setMdr20(cityRecord);
                                lastCity = city;
                        }
                        lastStreet = street;
                }
        }

        /**
         * Two streets are in the same group if they have the same mdr20 id.
         */
        protected boolean sameGroup(Mdr7Record street1, Mdr7Record street2) {
                return street2 != null && street1.getCity().getMdr20() == street2.getCity().getMdr20();
        }

        /**
         * Unknown.
         */
        public int getExtraValue() {
                return isForDevice() ? 0xe : 0x8800;
        }
}