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    <!--
    A list of attributes to resolve for normalizing the subject. For example, you might
    intend to lookup a name in a directory based on what the user entered. You can make this
    an empty list if you just want to resolve everything you normally would.
    -->
    <util:list id="shibboleth.c14n.attribute.AttributesToResolve">
        <value>uid</value>
    </util:list>

    <!--
    A list of attributes to search for a value to produce as the normalized subject name.
    This will normally be something you resolve above.
    -->
    <util:list id="shibboleth.c14n.attribute.AttributeSourceIds">
        <value>uid</value>
    </util:list>

	<bean id="shibboleth.c14n.attribute.PrincipalNameLookupStrategy"
            classparent="net.shibboleth.idp.profile.context.navigate.ScriptedContextLookupFunctionContextFunctions.Scripted"
            factory-method="inlineScript">
        <constructor-arg>
            <value>
            <![CDATA[
            var principalName = null;
            var subject = profileContext.getSubcontext("net.shibboleth.idp.authn.context.SubjectCanonicalizationContext").getSubject();
            var princs = subject.getPrincipals(Java.type("net.shibboleth.idp.authn.principal.UsernamePrincipal").class);
            if (princs.size() == 1) {
                principalName = princs.iterator().next().getName();
            }
            principalName;
            ]]>
            </value>
        </constructor-arg>
    </bean>