code: protected String getString() throws ValueFormatException
     {
        try
        {
           return new String(getAsByteArray(), Constants.DEFAULT_ENCODING);
        }
        catch (UnsupportedEncodingException e)
        {
           throw new ValueFormatException("Unsupported encoding " + Constants.DEFAULT_ENCODING, e);
        }
        catch (IOException e)
        {
           throw new ValueFormatException("Can't represents data as array of bytes", e);
        }
     }
docs: {@inheritDoc}