| /* |
| * Copyright (c) 1997, 2007, 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 com.sun.jmx.snmp.IPAcl; |
| |
| |
| |
| import java.util.Vector; |
| import java.io.Serializable; |
| |
| import java.security.Principal; |
| import java.security.acl.Owner; |
| import java.security.acl.LastOwnerException; |
| import java.security.acl.NotOwnerException; |
| |
| |
| /** |
| * Owner of Access Control Lists (ACLs). |
| * The initial owner Principal should be specified as an |
| * argument to the constructor of the class AclImpl. |
| * |
| * @see java.security.acl.Owner |
| */ |
| |
| class OwnerImpl implements Owner, Serializable { |
| private static final long serialVersionUID = -576066072046319874L; |
| |
| private Vector<Principal> ownerList = null; |
| |
| /** |
| * Constructs an empty list of owner. |
| */ |
| public OwnerImpl (){ |
| ownerList = new Vector<Principal>(); |
| } |
| |
| /** |
| * Constructs a list of owner with the specified principal as first element. |
| * |
| * @param owner the principal added to the owner list. |
| */ |
| public OwnerImpl (PrincipalImpl owner){ |
| ownerList = new Vector<Principal>(); |
| ownerList.addElement(owner); |
| } |
| |
| /** |
| * Adds an owner. Only owners can modify ACL contents. The caller principal |
| * must be an owner of the ACL in order to invoke this method. That is, only |
| * an owner can add another owner. The initial owner is configured at |
| * ACL construction time. |
| * |
| * @param caller the principal invoking this method. |
| * It must be an owner of the ACL. |
| * @param owner the owner that should be added to the list of owners. |
| * @return true if successful, false if owner is already an owner. |
| * @exception NotOwnerException if the caller principal is not an owner |
| * of the ACL. |
| */ |
| public boolean addOwner(Principal caller, Principal owner) |
| throws NotOwnerException { |
| if (!ownerList.contains(caller)) |
| throw new NotOwnerException(); |
| |
| if (ownerList.contains(owner)) { |
| return false; |
| } else { |
| ownerList.addElement(owner); |
| return true; |
| } |
| } |
| |
| /** |
| * Deletes an owner. If this is the last owner in the ACL, an exception is raised. |
| *<P> |
| * The caller principal must be an owner of the ACL in order to invoke this method. |
| * |
| * @param caller the principal invoking this method. It must be an owner |
| * of the ACL. |
| * @param owner the owner to be removed from the list of owners. |
| * @return true if successful, false if owner is already an owner. |
| * @exception NotOwnerException if the caller principal is not an owner |
| * of the ACL. |
| * @exception LastOwnerException if there is only one owner left, so that |
| * deleteOwner would leave the ACL owner-less. |
| */ |
| public boolean deleteOwner(Principal caller, Principal owner) |
| throws NotOwnerException,LastOwnerException { |
| |
| if (!ownerList.contains(caller)) |
| throw new NotOwnerException(); |
| |
| if (!ownerList.contains(owner)){ |
| return false; |
| } else { |
| if (ownerList.size() == 1) |
| throw new LastOwnerException(); |
| |
| ownerList.removeElement(owner); |
| return true; |
| } |
| } |
| |
| /** |
| * Returns true if the given principal is an owner of the ACL. |
| * |
| * @param owner the principal to be checked to determine whether or |
| * not it is an owner. |
| * @return true if the given principal is an owner of the ACL. |
| */ |
| public boolean isOwner(Principal owner){ |
| return ownerList.contains(owner); |
| } |
| } |