143 lines
4.2 KiB
Java
143 lines
4.2 KiB
Java
/*
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* Copyright (c) 1997, 2007, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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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.util.Enumeration;
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import java.io.Serializable;
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import java.net.UnknownHostException;
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import java.security.Principal;
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import java.security.acl.Group;
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/**
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* This class is used to represent a subnet mask (a group of hosts
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* matching the same
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* IP mask).
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*
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*/
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class GroupImpl extends PrincipalImpl implements Group, Serializable {
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private static final long serialVersionUID = -7777387035032541168L;
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/**
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* Constructs an empty group.
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* @exception UnknownHostException Not implemented
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*/
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public GroupImpl () throws UnknownHostException {
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}
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/**
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* Constructs a group using the specified subnet mask.
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*
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* @param mask The subnet mask to use to build the group.
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* @exception UnknownHostException if the subnet mask cann't be built.
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*/
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public GroupImpl (String mask) throws UnknownHostException {
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super(mask);
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}
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/**
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* Adds the specified member to the group.
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*
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* @param p the principal to add to this group.
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* @return true if the member was successfully added, false if the
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* principal was already a member.
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*/
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public boolean addMember(Principal p) {
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// we don't need to add members because the ip address is a
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// subnet mask
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return true;
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}
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public int hashCode() {
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return super.hashCode();
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}
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/**
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* Compares this group to the specified object. Returns true if the object
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* passed in matches the group represented.
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*
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* @param p the object to compare with.
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* @return true if the object passed in matches the subnet mask,
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* false otherwise.
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*/
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public boolean equals (Object p) {
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if (p instanceof PrincipalImpl || p instanceof GroupImpl){
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if ((super.hashCode() & p.hashCode()) == p.hashCode()) return true;
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else return false;
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} else {
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return false;
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}
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}
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/**
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* Returns true if the passed principal is a member of the group.
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*
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* @param p the principal whose membership is to be checked.
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* @return true if the principal is a member of this group, false otherwise.
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*/
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public boolean isMember(Principal p) {
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if ((p.hashCode() & super.hashCode()) == p.hashCode()) return true;
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else return false;
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}
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/**
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* Returns an enumeration which contains the subnet mask.
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*
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* @return an enumeration which contains the subnet mask.
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*/
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public Enumeration<? extends Principal> members(){
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Vector<Principal> v = new Vector<Principal>(1);
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v.addElement(this);
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return v.elements();
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}
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/**
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* Removes the specified member from the group. (Not implemented)
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*
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* @param p the principal to remove from this group.
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* @return allways return true.
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*/
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public boolean removeMember(Principal p) {
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return true;
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}
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/**
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* Prints a string representation of this group.
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*
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* @return a string representation of this group.
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*/
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public String toString() {
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return ("GroupImpl :"+super.getAddress().toString());
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}
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}
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