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/*
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* Copyright 1996-1997 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.security.acl;
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import java.security.Principal;
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/**
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* Interface for managing owners of Access Control Lists (ACLs) or ACL
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* configurations. (Note that the Acl interface in the
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* <code> java.security.acl </code> package extends this Owner
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* interface.) The initial owner Principal should be specified as an
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* argument to the constructor of the class implementing this interface.
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*
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* @see java.security.acl.Acl
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*
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*/
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public interface Owner {
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/**
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* Adds an owner. Only owners can modify ACL contents. The caller
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* principal must be an owner of the ACL in order to invoke this method.
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* That is, only an owner can add another owner. The initial owner is
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* configured at ACL construction time.
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*
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* @param caller the principal invoking this method. It must be an owner
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* of the ACL.
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*
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* @param owner the owner that should be added to the list of owners.
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*
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* @return true if successful, false if owner is already an owner.
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* @exception NotOwnerException if the caller principal is not an owner
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* of the ACL.
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*/
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public boolean addOwner(Principal caller, Principal owner)
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throws NotOwnerException;
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/**
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* Deletes an owner. If this is the last owner in the ACL, an exception is
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* raised.<p>
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*
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* The caller principal must be an owner of the ACL in order to invoke
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* this method.
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*
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* @param caller the principal invoking this method. It must be an owner
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* of the ACL.
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*
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* @param owner the owner to be removed from the list of owners.
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*
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* @return true if the owner is removed, false if the owner is not part
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* of the list of owners.
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*
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* @exception NotOwnerException if the caller principal is not an owner
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* of the ACL.
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*
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* @exception LastOwnerException if there is only one owner left, so that
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* deleteOwner would leave the ACL owner-less.
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*/
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public boolean deleteOwner(Principal caller, Principal owner)
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throws NotOwnerException, LastOwnerException;
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/**
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* Returns true if the given principal is an owner of the ACL.
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*
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* @param owner the principal to be checked to determine whether or not
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* it is an owner.
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*
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* @return true if the passed principal is in the list of owners, false
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* if not.
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*/
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public boolean isOwner(Principal owner);
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}
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