content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.security.user;
  
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.PropertyKey;
  import alluxio.exception.status.UnauthenticatedException;
  import alluxio.security.User;
  import alluxio.security.authentication.AuthType;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.security.auth.Subject;
  
  /**
   * A UserState implementation which does nothing.
   */
  public class NoopUserState extends BaseUserState {
    private static final Logger LOG = LoggerFactory.getLogger(NoopUserState.class);
    private static final User NOOP_USER = new User("");
  
    /**
     * Factory class to create the user state.
     */
    public static class Factory implements UserStateFactory {
      @Override
      public UserState create(Subject subject, AlluxioConfiguration conf, boolean isServer) {
        AuthType authType = conf.getEnum(PropertyKey.SECURITY_AUTHENTICATION_TYPE, AuthType.class);
        if (authType == AuthType.NOSASL) {
          return new NoopUserState(subject, conf);
        }
        return null;
      }
    }
  
    private NoopUserState(Subject subject, AlluxioConfiguration conf) {
      super(subject, conf);
    }
  
    @Override
    public User login() throws UnauthenticatedException {
      return NOOP_USER;
    }
  }
  