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.chemistry.opencmis.commons.data;
  
  import java.util.List;
  
  /**
   * Access Control Entry (ACE).
   */
  public interface Ace extends ExtensionsData {
  
      /**
       * Returns the ACE principal.
       * 
       * @return the principal
       */
      Principal getPrincipal();
  
      /**
       * Returns the ACE principal ID.
       * <p>
       * Shortcut for <code>getPrincipal().getId()</code>.
       * 
       * @return the principal ID or {@code null} if no principal is set
       */
      String getPrincipalId();
  
      /**
       * Returns the permissions granted to the principal.
       * 
       * @return the list of permissions, not {@code null}
       */
      List<String> getPermissions();
  
      /**
       * Indicates if the ACE was directly applied to the object or has been
       * inherited from another object (for example from the folder it resides
       * in).
       * 
       * @return {@code true} if it is direct ACE, {@code false} if it is
       *         non-direct ACE
       */
      boolean isDirect();
  }
  