Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

This package
defines a mechanism that allows the low-level code of a
javax.security.auth.spi.LoginModule to interact
with the end-user of an application to obtain a username, password,
or other authentication-related information. The
LoginModule sends messages and requests for
information in the form of objects that implement the
Callback interface. An application that wants to
authenticate a user provides (via a
javax.security.auth.login.LoginContext) a
CallbackHandler object to convert these
Callback objects into text or GUI-based
interactions with the user. An application that want to provide a
customized login interface must implement its own
CallbackHandler. The
CallbackHandler API consists of only a single
method, but the implementation of that method can require a
substantial amount of code. See the various
Callback classes for directions on how a
CallbackHandler should handle them.

Sun's J2SE SDK for Java 1.4 ships with two
implementations of CallbackHandler, both in the
package com.sun.security.auth.callback. Although
these classes are not guaranteed to exist in all distributions,
text-based applications may use the
TextCallbackHandler, and GUI-based applications
may use the DialogCallbackHandler. Programmers
wanting to write a custom CallbackHandler may also
find it useful to study the source code of these two existing
handlers.

Interfaces

Callback ;
public interface

CallbackHandler ;

Classes

ChoiceCallback implements Callback, Serializable;
public class

ConfirmationCallback implements Callback, Serializable;
public class

LanguageCallback implements Callback, Serializable;
public class

NameCallback implements Callback, Serializable;
public class

PasswordCallback implements Callback, Serializable;
public class

TextInputCallback implements Callback, Serializable;
public class

TextOutputCallback implements Callback, Serializable;

Exceptions

UnsupportedCallbackException extends Exception;