| /* |
| * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.acl; |
| |
| import java.util.*; |
| import java.security.*; |
| import java.security.acl.*; |
| |
| /** |
| * Class implementing the Owner interface. The |
| * initial owner principal is configured as |
| * part of the constructor. |
| * @author Satish Dharmaraj |
| */ |
| public class OwnerImpl implements Owner { |
| private Group ownerGroup; |
| |
| public OwnerImpl(Principal owner) { |
| ownerGroup = new GroupImpl("AclOwners"); |
| ownerGroup.addMember(owner); |
| } |
| |
| /** |
| * Adds an owner. Owners can modify ACL contents and can disassociate |
| * ACLs from the objects they protect in the AclConfig interface. |
| * The caller principal must be a part of the owners list of the ACL in |
| * order to invoke this method. The initial owner is configured |
| * at ACL construction time. |
| * @param caller the principal who is invoking this method. |
| * @param owner The owner that should be added to the owners list. |
| * @return true if success, false if already an owner. |
| * @exception NotOwnerException if the caller principal is not on |
| * the owners list of the Acl. |
| */ |
| public synchronized boolean addOwner(Principal caller, Principal owner) |
| throws NotOwnerException |
| { |
| if (!isOwner(caller)) |
| throw new NotOwnerException(); |
| |
| ownerGroup.addMember(owner); |
| return false; |
| } |
| |
| /** |
| * Delete owner. If this is the last owner in the ACL, an exception is |
| * raised. |
| * The caller principal must be a part of the owners list of the ACL in |
| * order to invoke this method. |
| * @param caller the principal who is invoking this method. |
| * @param owner The owner to be removed from the owners list. |
| * @return true if the owner is removed, false if the owner is not part |
| * of the owners list. |
| * @exception NotOwnerException if the caller principal is not on |
| * the owners list of the Acl. |
| * @exception LastOwnerException if there is only one owner left in the group, then |
| * deleteOwner would leave the ACL owner-less. This exception is raised in such a case. |
| */ |
| public synchronized boolean deleteOwner(Principal caller, Principal owner) |
| throws NotOwnerException, LastOwnerException |
| { |
| if (!isOwner(caller)) |
| throw new NotOwnerException(); |
| |
| Enumeration<? extends Principal> e = ownerGroup.members(); |
| // |
| // check if there is atleast 2 members left. |
| // |
| Object o = e.nextElement(); |
| if (e.hasMoreElements()) |
| return ownerGroup.removeMember(owner); |
| else |
| throw new LastOwnerException(); |
| |
| } |
| |
| /** |
| * returns if the given principal belongs to the owner list. |
| * @param owner The owner to check if part of the owners list |
| * @return true if the passed principal is in the owner list, false if not. |
| */ |
| public synchronized boolean isOwner(Principal owner) { |
| return ownerGroup.isMember(owner); |
| } |
| } |