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A library jar that provides APIs for Applications written for the Google Android Platform.

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/*
 *  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 java.security.acl;

import java.security.Principal;
import java.util.Enumeration;

/**
 * The Access Control List Entry interface definition.
 * 

* An {@code AclEntry} is a list of the {@link Permission}s that are * granted (positive) or denied (negative) to a {@link Principal}. */ public interface AclEntry extends Cloneable { /** * Set the principal for this ACL entry. *

* The principal for an ACL entry can only be set once. * * @param user * the principal for this ACL entry. * @return {@code true} on success, {@code false} if there is a principal already set for * this entry. */ boolean setPrincipal(Principal user); /** * Returns the principal of this ACL entry. * * @return the principal of this ACL entry, or null if none is set. */ Principal getPrincipal(); /** * Sets this ACL entry to be negative. *

* The permissions in this ACL entry will be denied to the principal * associated with this entry. *

* Note: An ACL entry is positive by default and can only become * negative by calling this method. */ void setNegativePermissions(); /** * Returns whether this ACL entry is negative. * * @return {@code true} if this ACL entry is negative, {@code false} if it's positive. */ boolean isNegative(); /** * Adds the specified permission to this ACL entry. * * @param permission * the permission to be added. * @return {@code true} if the specified permission is added, {@code false} if the * permission was already in this entry. */ boolean addPermission(Permission permission); /** * Removes the specified permission from this ACL entry. * * @param permission * the permission to be removed. * @return {@code true} if the permission is removed, {@code false} if the permission was * not in this entry. */ boolean removePermission(Permission permission); /** * Checks whether the specified permission is in this ACL entry. * * @param permission * the permission to check. * @return {@code true} if the permission is in this entry, otherwise {@code false}. */ boolean checkPermission(Permission permission); /** * Returns the list of permissions of this ACL entry. * * @return the list of permissions of this ACL entry, */ Enumeration permissions(); /** * Returns the string representation of this ACL entry. * * @return the string representation of this ACL entry. */ String toString(); /** * Clones this ACL entry instance. * * @return a copy of this entry. */ Object clone(); }





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