content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.ambari.server.security.authorization.internal;
  
  
  import org.aopalliance.intercept.MethodInterceptor;
  import org.aopalliance.intercept.MethodInvocation;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.context.SecurityContextHolder;
  
  
  /**
   * Allows running a given code within a security context authenticated with InternalAuthenticationToken.
   * This only works for instances created by Guice. If there's already an Authentication in current security context
   * that will be restored after calling the annotated method.
   */
  public class InternalAuthenticationInterceptor implements MethodInterceptor {
  
    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
  
      Authentication savedAuthContext = SecurityContextHolder.getContext().getAuthentication();
      try {
        RunWithInternalSecurityContext securityAuthContextAnnotation = invocation.getMethod().getAnnotation(RunWithInternalSecurityContext
          .class);
        InternalAuthenticationToken authenticationToken = new InternalAuthenticationToken(securityAuthContextAnnotation
          .token());
        authenticationToken.setAuthenticated(true);
        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
        return invocation.proceed();
      } finally {
        SecurityContextHolder.getContext().setAuthentication(savedAuthContext);
      }
  
    }
  }
  