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.activemq.security;
  
  import java.security.Principal;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  
  import org.apache.activemq.command.ActiveMQDestination;
  
  /**
   * Used to cache up authorizations so that subsequent requests are faster.
   *
   *
   */
  public abstract class SecurityContext {
  
      public static final SecurityContext BROKER_SECURITY_CONTEXT = new SecurityContext("ActiveMQBroker") {
          @Override
          public boolean isBrokerContext() {
              return true;
          }
  
          @Override
          public Set<Principal> getPrincipals() {
              return Collections.emptySet();
          }
      };
  
      final String userName;
  
      final ConcurrentMap<ActiveMQDestination, ActiveMQDestination> authorizedWriteDests = new ConcurrentHashMap<ActiveMQDestination, ActiveMQDestination>();
  
      public SecurityContext(String userName) {
          this.userName = userName;
      }
  
      public boolean isInOneOf(Set<?> allowedPrincipals) {
          Iterator<?> allowedIter = allowedPrincipals.iterator();
          HashSet<?> userPrincipals = new HashSet<Object>(getPrincipals());
          while (allowedIter.hasNext()) {
              Iterator<?> userIter = userPrincipals.iterator();
              Object allowedPrincipal = allowedIter.next();
              while (userIter.hasNext()) {
                  if (allowedPrincipal.equals(userIter.next()))
                      return true;
              }
          }
          return false;
      }
  
      public abstract Set<Principal> getPrincipals();
  
      public String getUserName() {
          return userName;
      }
  
      public ConcurrentMap<ActiveMQDestination, ActiveMQDestination> getAuthorizedWriteDests() {
          return authorizedWriteDests;
      }
  
      public boolean isBrokerContext() {
          return false;
      }
  }
  