How to get a reference to SessionAuthenticationStrategy without configuring the strategy explicit?

Question

In a Spring Security 3.2 based application I have a explicit configured UsernamePasswordAuthenticationFilter, that need an reference to the sessionAuthenticationStrategy (in order to invoke .onAuthentication).*

The sessionAuthenticationStrategy is the default one created by <security:http> (HttpSecurityBeanDefinitionParser).

My question: Is how can I get an reference to the SessionAuthenticationStrategy without configuring the complete SessionAuthenticationStrategy explicite, so that I can inject this reference in XML configuration?

<security:http auto-config="false" use-expressions="true"
    entry-point-ref="loginUrlAuthenticationEntryPoint" 
    access-decision-manager-ref="httpAccessDecisionManager">
    ...
    <security:custom-filter
             ref="usernamePasswordAuthenticationFilter"
             position="FORM_LOGIN_FILTER"/>
    ...
</security:http>

...

<bean id="usernamePasswordAuthenticationFilter"
    class=" o.s.scurity.web.authentication.UsernamePasswordAuthenticationFilter">

   <property name="sessionAuthenticationStrategy" ref="????">   <!-- ?? ->
   ...
</bean>

*my real UsernamePasswordAuthenticationFilter is a customized subclass, but that should not matter for this question

Answer 1

When working with JavaConfig (I'm afraid is not your case) you can get a reference by doing

        http.getConfigurer(SessionManagementConfigurer.class).init(http);
        http.getSharedObject(SessionAuthenticationStrategy.class);