85 lines
3.5 KiB
Java
85 lines
3.5 KiB
Java
/* Owner.java -- ACL owner
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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package java.security.acl;
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import java.security.Principal;
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/**
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* This interface provides a mechanism for maintaining a list of owners
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* of an access control list (ACL). Since a <code>Principal</code> must
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* be an owner in order to modify the owner list, a mechanism must be
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* provided to specify the initial owner of the ACL. The proper way to do
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* this is for the implementing class to specify the initial owner in
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* the contructor for that class.
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*
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* @version 0.0
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public interface Owner
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{
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/**
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* This method adds an owner to the access control list (ACL). Only a
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* <code>Principal</code> who is already an owner can perform this operation.
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*
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* @param caller The <code>Principal</code> who is requesting that an owner be added
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* @param owner The <code>Principal</code> to add as a new owner
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*
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* @param <code>true</code> if the new owner was successfully added or <code>false</code> if the specified new owner is already an owner
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*
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* @exception NotOwnerException If the caller is not already an owner of this ACL
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*/
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public abstract boolean addOwner(Principal caller, Principal owner)
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throws NotOwnerException;
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/**
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* This method delets an owner from the access control list (ACL). Only a
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* <code>Principal</code> who is an owner can perform this operation. An
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* owner can delete itself from the list. If there is only one
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* owner remaining on this list, any attempt to delete it will throw an
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* exception.
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*
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* @param caller The <code>Principal</code> who is requesting that an owner be deleted
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* @param owner The <code>Principal</code> to delete as an owner
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*
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* @param <code>true</code> if the new owner was successfully deleted or <code>false</code> if the specified owner is not currently an owner
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*
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* @exception NotOwnerException If the caller is not already an owner of this ACL
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* @exception LastOwnerException If completing the operation would delete the last ACL owner
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*/
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public abstract boolean deleteOwner(Principal caller, Principal owner)
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throws NotOwnerException, LastOwnerException;
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/**
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* This method tests whether or not a given <code>Principal</code> is an
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* owner of this access control list (ACL).
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*
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* @return <code>true</code> if the <code>Principal</code> is an owner, <code>false</code> otherwise
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*/
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public abstract boolean isOwner(Principal owner);
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}
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