/*
* @(#)Owner.java 1.19 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* This program 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 at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.security.acl;
import java.security.Principal;
/**
* Interface for managing owners of Access Control Lists (ACLs) or ACL
* configurations. (Note that the Acl interface in the
* <code> java.security.acl </code> package extends this Owner
* interface.) The initial owner Principal should be specified as an
* argument to the constructor of the class implementing this interface.
*
* @see java.security.acl.Acl
*
*/
public interface 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;
/**
* 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 the owner is removed, false if the owner is not part
* of the list of owners.
*
* @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;
/**
* 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 passed principal is in the list of owners, false
* if not.
*/
public boolean isOwner(Principal owner);
}