/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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package javax.security.auth.callback;
/**
* <p> Implementations of this interface are passed to a
* <code>CallbackHandler</code>, allowing underlying security services
* the ability to interact with a calling application to retrieve specific
* authentication data such as usernames and passwords, or to display
* certain information, such as error and warning messages.
*
* <p> <code>Callback</code> implementations do not retrieve or
* display the information requested by underlying security services.
* <code>Callback</code> implementations simply provide the means
* to pass such requests to applications, and for applications,
* if appropriate, to return requested information back to the
* underlying security services.
*
* @see javax.security.auth.callback.CallbackHandler
* @see javax.security.auth.callback.ChoiceCallback
* @see javax.security.auth.callback.ConfirmationCallback
* @see javax.security.auth.callback.LanguageCallback
* @see javax.security.auth.callback.NameCallback
* @see javax.security.auth.callback.PasswordCallback
* @see javax.security.auth.callback.TextInputCallback
* @see javax.security.auth.callback.TextOutputCallback
*/
public interface Callback { }