public static int copy(final File in, final String inputEncoding, final File out, final String outputEncoding) {
        assertArgumentNotNull("in", in);
        assertArgumentNotEmpty("inputEncoding", inputEncoding);
        assertArgumentNotNull("out", out);
        assertArgumentNotEmpty("outputEncoding", outputEncoding);

        final Reader is = ReaderUtil.create(in, inputEncoding);
        try {