Subversion Repositories mkgmap

/*
 * Copyright (C) 2012.
 *
 * 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 func.lib;

import java.io.FileNotFoundException;
import java.io.Reader;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import uk.me.parabola.mkgmap.osmstyle.StyleFileLoader;

/**
 * A style file loader where all the files are held as strings within the loader itself.
 *
 * A file name and contents can be added with the {@link #addfile(String, String)} method, or by passing an
 * array to the constructor of name,content pairs.
 *
 * Used for testing.
 *
 * @author Steve Ratcliffe
 */
public class StringStyleFileLoader extends StyleFileLoader {
        private final Map<String, String> files = new HashMap<String, String>();

        /**
         * Pass filename and file contents like so:
         * <pre>
         *     new String[][] {
         *         {"lines", "highway=primary [0x2]"},
         *         {"points", "amenity=doctors [0x88]"},
         *         ...
         *     }
         * </pre>
         * @param files An array of filename, content pairs.
         */
        public StringStyleFileLoader(String[][] files) {
                for (String[] nameContents : files)
                        addfile(nameContents[0], nameContents[1]);
        }

        public void addfile(String name, String contents) {
                files.put(name, contents);
        }

        /**
         * Open a file within the style. Creates a StringReader with the contents corresponding
         * to the given filename. If the filename does not exist in the files array, then a FileNotFoundException
         * is thrown as it would be in a regular style.
         *
         * @param filename The name of the file in the style.
         * @return A StringReader with the contents of the file.
         * @throws FileNotFoundException If the file name is not found in the files array.
         */
        public Reader open(String filename) throws FileNotFoundException {
                String contents = files.get(filename);
                if (contents == null)
                        throw new FileNotFoundException("No such file " + filename);
                return new StringReader(contents);
        }

        public void close() {
                // Nothing to do
        }

        /**
         * List the filenames in the style.
         * For completeness, we probably won't use this.
         */
        public String[] list() {
                Set<String> strings = files.keySet();
                return strings.toArray(new String[strings.size()]);
        }
}