if (spec.startsWith("file:")) { File file = new File(spec.substring(5)); if (!file.isAbsolute()) spec = "file:" + file.getAbsolutePath(); }
	private static URL buildURL(String spec) {		if (spec == null)			return null;		try {			return new URL(spec);		} catch (MalformedURLException e) {			if (spec.startsWith("file:"))				return null;			return buildURL("file:" + spec);		}	}