String classpath = System.getProperty("java.class.path");
            int index = classpath.toLowerCase().indexOf("felix.jar");
            int start = classpath.lastIndexOf(File.pathSeparator, index) + 1;
            if (index >= start)
            {
                // Get the path of the felix.jar file.
                String jarLocation = classpath.substring(start, index);
                // Calculate the conf directory based on the parent
                // directory of the felix.jar directory.
                confDir = new File(
                    new File(new File(jarLocation).getAbsolutePath()).getParent(),
                    CONFIG_DIRECTORY);
            }
            else
            {
                // Can't figure it out so use the current directory as default.
                confDir = new File(System.getProperty("user.dir"), CONFIG_DIRECTORY);
            }

            try
            {
                propURL = new File(confDir, CONFIG_PROPERTIES_FILE_VALUE).toURL();
            }
            catch (MalformedURLException ex)
            {
                System.err.print("Main: " + ex);
                return null;
            }