Subversion Repositories splitter

/*
 * File: Version.java
 *
 * Copyright (C) 2007 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: 12 Dec 2007
 */

package uk.me.parabola.splitter;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * Definitions of version numbers.
 *
 * @author Steve Ratcliffe
 */
public class Version {

        public static final String VERSION = getSvnVersion();
        public static final String TIMESTAMP = getTimeStamp();

        // A default version to use.  
        private static final String DEFAULT_VERSION = "unknown";
        private static final String DEFAULT_TIMESTAMP = "unknown";

        /**
         * Get the version number if we can find one, else a default string.
         * This looks in a file called splitter-version.properties on the
         * classpath.
         * This is created outside of the system by the build script.
         *
         * @return The version number or a default string if a version number
         * cannot be found.
         */
        private static String getSvnVersion() {
                InputStream is = Version.class.getResourceAsStream("/splitter-version.properties");
                if (is == null)
                        return DEFAULT_VERSION;

                Properties props = new Properties();
                try {
                        props.load(is);
                } catch (IOException e) {
                        return DEFAULT_VERSION;
                }
                String version = props.getProperty("svn.version", DEFAULT_VERSION);
                if (version.matches("[1-9]+.*"))
                        return version;
                else
                        return DEFAULT_VERSION;
        }
        private static String getTimeStamp() {
                InputStream is = Version.class.getResourceAsStream("/splitter-version.properties");
                if (is == null)
                        return DEFAULT_TIMESTAMP;

                Properties props = new Properties();
                try {
                        props.load(is);
                } catch (IOException e) {
                        return DEFAULT_TIMESTAMP;
                }

                return props.getProperty("build.timestamp", DEFAULT_TIMESTAMP);
        }
}