org.springframework.security.config.authentication
Class AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider

java.lang.Object
  org.springframework.security.config.authentication.AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider

All Implemented Interfaces:

AuthenticationProvider

Enclosing class:

AuthenticationManagerBeanDefinitionParser

public static final class AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider
extends Object
implements AuthenticationProvider

Provider which doesn't provide any service. Only used to prevent a configuration exception if the provider list is empty (usually because a child ProviderManager from the <http> namespace, such as OpenID, is expected to handle the request).

Constructor Summary

AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider()

Method Summary

Authentication	authenticate(Authentication authentication) Performs authentication with the same contract as AuthenticationManager.authenticate(Authentication).
boolean	supports(Class<? extends Object> authentication) Returns true if this AuthenticationProvider supports the indicated Authentication object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider

public AuthenticationManagerBeanDefinitionParser.NullAuthenticationProvider()

Method Detail

authenticate

public Authentication authenticate(Authentication authentication)
                            throws AuthenticationException

Description copied from interface: AuthenticationProvider

Performs authentication with the same contract as AuthenticationManager.authenticate(Authentication).

Specified by:

authenticate in interface AuthenticationProvider

Parameters:

authentication - the authentication request object.

Returns:

a fully authenticated object including credentials. May return null if the AuthenticationProvider is unable to support authentication of the passed Authentication object. In such a case, the next AuthenticationProvider that supports the presented Authentication class will be tried.

Throws:

AuthenticationException - if authentication fails.

supports

public boolean supports(Class<? extends Object> authentication)

Description copied from interface: AuthenticationProvider

Returns true if this AuthenticationProvider supports the indicated Authentication object.

Returning true does not guarantee an AuthenticationProvider will be able to authenticate the presented instance of the Authentication class. It simply indicates it can support closer evaluation of it. An AuthenticationProvider can still return null from the AuthenticationProvider.authenticate(Authentication) method to indicate another AuthenticationProvider should be tried.

Selection of an AuthenticationProvider capable of performing authentication is conducted at runtime the ProviderManager.

Specified by:

supports in interface AuthenticationProvider

Parameters:

authentication - DOCUMENT ME!

Returns:

true if the implementation can more closely evaluate the Authentication class presented