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138 lines
3.5 KiB
138 lines
3.5 KiB
/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package com.sun.jmx.snmp.IPAcl;
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import java.util.Vector;
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import java.io.Serializable;
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import java.security.Principal;
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import java.security.acl.Owner;
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import java.security.acl.LastOwnerException;
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import java.security.acl.NotOwnerException;
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/**
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* Owner of Access Control Lists (ACLs).
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* The initial owner Principal should be specified as an
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* argument to the constructor of the class AclImpl.
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*
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* @see java.security.acl.Owner
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*/
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class OwnerImpl implements Owner, Serializable {
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private static final long serialVersionUID = -576066072046319874L;
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private Vector<Principal> ownerList = null;
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/**
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* Constructs an empty list of owner.
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*/
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public OwnerImpl (){
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ownerList = new Vector<Principal>();
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}
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/**
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* Constructs a list of owner with the specified principal as first element.
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*
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* @param owner the principal added to the owner list.
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*/
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public OwnerImpl (PrincipalImpl owner){
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ownerList = new Vector<Principal>();
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ownerList.addElement(owner);
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}
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/**
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* Adds an owner. Only owners can modify ACL contents. The caller principal
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* must be an owner of the ACL in order to invoke this method. That is, only
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* an owner can add another owner. The initial owner is configured at
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* ACL construction time.
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*
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* @param caller the principal invoking this method.
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* It must be an owner of the ACL.
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* @param owner the owner that should be added to the list of owners.
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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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if (!ownerList.contains(caller))
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throw new NotOwnerException();
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if (ownerList.contains(owner)) {
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return false;
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} else {
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ownerList.addElement(owner);
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return true;
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}
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}
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/**
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* Deletes an owner. If this is the last owner in the ACL, an exception is raised.
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*<P>
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* The caller principal must be an owner of the ACL in order to invoke 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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* @param owner the owner to be removed from the list of owners.
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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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* @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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if (!ownerList.contains(caller))
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throw new NotOwnerException();
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if (!ownerList.contains(owner)){
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return false;
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} else {
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if (ownerList.size() == 1)
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throw new LastOwnerException();
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ownerList.removeElement(owner);
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return true;
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}
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}
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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
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* not it is an owner.
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* @return true if the given principal is an owner of the ACL.
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*/
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public boolean isOwner(Principal owner){
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return ownerList.contains(owner);
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}
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}
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