public static Options options(Configuration conf) {
    return new Options(conf);
  }
@Test
  public void testOptions() throws Exception {
    Configuration conf = new Configuration();
    conf.set(KeyProvider.DEFAULT_CIPHER_NAME, "myCipher");
    conf.setInt(KeyProvider.DEFAULT_BITLENGTH_NAME, 512);
    Map<String, String> attributes = new HashMap<String, String>();
    attributes.put("a", "A");
    KeyProvider.Options options = KeyProvider.options(conf);
    assertEquals("myCipher", options.getCipher());
    assertEquals(512, options.getBitLength());
    options.setCipher("yourCipher");
    options.setDescription("description");
    options.setAttributes(attributes);
    options.setBitLength(128);
    assertEquals("yourCipher", options.getCipher());
    assertEquals(128, options.getBitLength());
    assertEquals("description", options.getDescription());
    assertEquals(attributes, options.getAttributes());
    options = KeyProvider.options(new Configuration());
    assertEquals(KeyProvider.DEFAULT_CIPHER, options.getCipher());
    assertEquals(KeyProvider.DEFAULT_BITLENGTH, options.getBitLength());
  }