/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited

  *

  * Licensed 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.acegisecurity.acls;

 import org.acegisecurity.acls.sid.Sid;

 import java.io.Serializable;

 /**

  * Represents an individual permission assignment within an {@link Acl}.

  *

  * <p>

  * Instances MUST be immutable, as they are returned by <code>Acl</code>

  * and should not allow client modification.

  * </p>

  *

  * @author Ben Alex

  * @version $Id: AccessControlEntry.java 1784 2007-02-24 21:00:24Z luke_t $

  *

  */

 public interface AccessControlEntry {

     //~ Methods ========================================================================================================

     Acl getAcl();

     /**

      * Obtains an identifier that represents this ACE.

      *

      * @return the identifier, or <code>null</code> if unsaved

      */

     Serializable getId();

     Permission getPermission();

     Sid getSid();

     /**

      * Indicates the a Permission is being granted to the relevant Sid. If false, indicates the permission is

      * being revoked/blocked.

      *

      * @return true if being granted, false otherwise

      */

     boolean isGranting();

 }