Subversion Repositories mkgmap

/*
 * Copyright (C) 2010 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.
 */
package uk.me.parabola.mkgmap.reader.osm.bin;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import uk.me.parabola.imgfmt.FormatException;
import uk.me.parabola.imgfmt.Utils;
import uk.me.parabola.mkgmap.reader.osm.OsmMapDataSource;
import uk.me.parabola.mkgmap.reader.osm.bin.OsmBinHandler.BinParser;

import crosby.binary.file.BlockInputStream;

/**
 * Read an OpenStreetMap data file in .osm version 0.5 format.  It is converted
 * into a generic format that the map is built from.
 * <p>The intermediate format is important as several passes are required to
 * produce the map at different zoom levels. At lower resolutions, some roads
 * will have fewer points or won't be shown at all.
 *
 * @author Steve Ratcliffe
 */
public class OsmBinMapDataSource extends OsmMapDataSource {

        public boolean isFileSupported(String name) {
                // The extension for the protobuf format is now fixed at .osm.pbf
                // Previously we temporarily used the .bin extension to
                // indicate Scott's format. The .bin extension remains here for the
                // time being, but may be removed.  Please use .pbf.
                return name.endsWith(".osm.pbf") || name.endsWith(".bin");
        }

        /**
         * Load the .osm file and produce the intermediate format.
         *
         * @param name The filename to read.
         * @throws FileNotFoundException If the file does not exist.
         */
        public void load(String name) throws FileNotFoundException, FormatException {
                InputStream is = Utils.openFile(name);

                OsmBinHandler handler = new OsmBinHandler(getConfig());

                setupHandler(handler);

                try {
                        BinParser reader = handler.new BinParser();
                        BlockInputStream stream = new BlockInputStream(is, reader);
                        stream.process();
                } catch (NoClassDefFoundError e) {
                        throw new FormatException("Failed to read binary file, probably missing protobuf.jar");
                } catch (IOException e) {
                        throw new FormatException("Failed to read binary file " + name);
                }

                osmReadingHooks.end();
               
                elementSaver.finishLoading();
                // now convert the saved elements
                elementSaver.convert(getConverter());

                addBackground();
        }
}