* for obtaining login credentials, resolving user information, and managing SSO
 * lifecycle operations like logout and metadata exchange.
 */
public interface SsoAuthenticator {

    /**
     * Gets the login credential for SSO authentication.
     * @return The login credential.
     */
    LoginCredential getLoginCredential();

    /**

            }
        };

        SsoAuthenticator authenticator = ssoManager.getAuthenticator();
        assertNull(authenticator);
    }

    // Test register() and getAuthenticators() methods
    public void test_register_singleAuthenticator() {
        ssoManager.register(testAuthenticator);
        SsoAuthenticator[] authenticators = ssoManager.getAuthenticators();

     */
    public SsoAuthenticator[] getAuthenticators() {
        return authenticatorList.toArray(new SsoAuthenticator[authenticatorList.size()]);
    }

    /**
     * Registers an SSO authenticator with this manager.
     *
     * @param authenticator The SSO authenticator to register
     */
    public void register(final SsoAuthenticator authenticator) {
        if (logger.isInfoEnabled()) {

import org.codelibs.fess.app.web.base.login.OpenIdConnectCredential;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.sso.SsoAuthenticator;
import org.codelibs.fess.sso.SsoResponseType;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.optional.OptionalEntity;
import org.lastaflute.web.login.credential.LoginCredential;

        String logoutResult = authenticator.logout(user);
        assertEquals(logoutUrl, logoutResult);
    }

    // Test implementation of SsoAuthenticator for testing
    private static class TestSsoAuthenticator implements SsoAuthenticator {
        private LoginCredential loginCredential;
        private FessLoginAssist.LoginCredentialResolver lastResolver;
        private boolean resolverCalled = false;

import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.user.exbhv.UserBhv;
import org.codelibs.fess.sso.SsoAuthenticator;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.core.magic.async.AsyncManager;

import org.codelibs.fess.exception.SsoMessageException;
import org.codelibs.fess.exception.SsoProcessException;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.sso.SsoAuthenticator;
import org.codelibs.fess.sso.SsoResponseType;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.saml2.Auth;
import org.codelibs.saml2.core.authn.AuthnRequestParams;

import org.codelibs.fess.exception.SsoLoginException;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.sso.SsoAuthenticator;
import org.codelibs.fess.sso.SsoResponseType;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.spnego.SpnegoFilterConfig;
import org.codelibs.spnego.SpnegoHttpFilter;

import org.codelibs.fess.exception.SsoLoginException;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.sso.SsoAuthenticator;
import org.codelibs.fess.sso.SsoResponseType;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.opensearch.runner.net.OpenSearchCurl;