[keycloak-user] ECP example?

I want to secure a servlet REST application. My client is java, so far I've been using apache httpclient. The Keycloak docs mention SAML ECP binding is supported, but I don't see an example. The admin pages seems to assume only POST or redirect binding. Does the client adapter support ECP binding. Any pointers or help on how to go about it? I need help on both the client adapter and how to use Keycloak as a SAML ECP IDP. Thanks, Carlos