public abstract class EncodedStream {
    private final static char[] HEX_DIGIT = new char[] {
        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
    };

    @SuppressWarnings("InputStreamSlowMultibyteRead")
    public static class EncodedInput extends InputStream {

        private final InputStream delegate;

        public EncodedInput(java.io.InputStream delegate) {
            this.delegate = delegate;