1. /*

  2.  * Copyright 2002 Sun Microsystems, Inc. All rights reserved.

  3.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  4.  */

  5. 

  6. 

  7. package javax.security.auth.callback;

  8. 

  9. /**

  10.  * <p> Implementations of this interface are passed to a

  11.  * <code>CallbackHandler</code>, allowing underlying security services

  12.  * the ability to interact with a calling application to retrieve specific

  13.  * authentication data such as usernames and passwords, or to display

  14.  * certain information, such as error and warning messages.

  15.  *

  16.  * <p> <code>Callback</code> implementations do not retrieve or

  17.  * display the information requested by underlying security services.

  18.  * <code>Callback</code> implementations simply provide the means

  19.  * to pass such requests to applications, and for applications,

  20.  * if appropriate, to return requested information back to the

  21.  * underlying security services.

  22.  *

  23.  * @version 1.6, 01/11/00

  24.  * @see javax.security.auth.callback.CallbackHandler

  25.  * @see javax.security.auth.callback.ChoiceCallback

  26.  * @see javax.security.auth.callback.ConfirmationCallback

  27.  * @see javax.security.auth.callback.LanguageCallback

  28.  * @see javax.security.auth.callback.NameCallback

  29.  * @see javax.security.auth.callback.PasswordCallback

  30.  * @see javax.security.auth.callback.TextInputCallback

  31.  * @see javax.security.auth.callback.TextOutputCallback

  32.  */

  33. public interface Callback { }