I want to set the RelayState parameter so that I can pass a redirectUrl received at runtime from a different request. This was possible in the SAML extension library by overriding the getProfileOptions() method of the SAMLEntryPoint class. However, it is not possible to do the same in Spring Security even with the following XML configuration:

<http>
       <saml2-login relying-party-registration-repository-ref="xxxxx">
</http>

I cannot find a sample application that showcases how to create a relying-party-registration-repository bean where I can pass the relying-party-registrations to its constructor. The relying-party-registrations should allow alias to be used as a reference in some other place.