@Override
    public boolean supports(final SingleSignOnParticipationRequest ssoRequest) {
        return ssoRequest.containsAttribute(AuthnRequest.class.getName())
               && ssoRequest.containsAttribute(Issuer.class.getName());
    }
This is {@link SamlIdPSingleSignOnParticipationStrategy}.

@author Misagh Moayyed
@since 6.4.0
support/cas-server-support-saml-idp-web/src/main/java/org/apereo/cas/support/saml/web/idp/web/SamlIdPSingleSignOnParticipationStrategy.java