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.causeway.security.shiro.context;
  
  import org.apache.shiro.SecurityUtils;
  import org.apache.shiro.UnavailableSecurityManagerException;
  import org.apache.shiro.mgt.RealmSecurityManager;
  import org.apache.shiro.mgt.SecurityManager;
  
  import org.apache.causeway.core.security.authentication.Authenticator;
  import org.apache.causeway.core.security.authorization.Authorizor;
  
  /**
   * @since 2.0
   */
  public final class ShiroSecurityContext {
  
      /**
       * The {@link SecurityManager} is shared between both the {@link Authenticator} and the {@link Authorizor}
       * (if shiro is configured for both components).
       */
      public static RealmSecurityManager getSecurityManager() {
          SecurityManager securityManager;
          try {
              securityManager = SecurityUtils.getSecurityManager();
          } catch(UnavailableSecurityManagerException ex) {
              return null;
          }
          if(!(securityManager instanceof RealmSecurityManager)) {
              return null;
          }
          return (RealmSecurityManager) securityManager;
      }
  
  }
  