/*
* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 in the LICENSE file that
* accompanied this code).
*
* 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.
*
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package com.sun.jmx.snmp.IPAcl;
import java.util.Vector;
import java.util.Enumeration;
import java.io.Serializable;
import java.net.UnknownHostException;
import java.security.Principal;
import java.security.acl.Group;
/**
* This class is used to represent a subnet mask (a group of hosts
* matching the same
* IP mask).
*
*/
class GroupImpl extends PrincipalImpl implements Group, Serializable {
private static final long serialVersionUID = -7777387035032541168L;
/**
* Constructs an empty group.
* @exception UnknownHostException Not implemented
*/
public GroupImpl () throws UnknownHostException {
}
/**
* Constructs a group using the specified subnet mask.
*
* @param mask The subnet mask to use to build the group.
* @exception UnknownHostException if the subnet mask cann't be built.
*/
public GroupImpl (String mask) throws UnknownHostException {
super(mask);
}
/**
* Adds the specified member to the group.
*
* @param p the principal to add to this group.
* @return true if the member was successfully added, false if the
* principal was already a member.
*/
public boolean addMember(Principal p) {
// we don't need to add members because the ip address is a
// subnet mask
return true;
}
public int hashCode() {
return super.hashCode();
}
/**
* Compares this group to the specified object. Returns true if the object
* passed in matches the group represented.
*
* @param p the object to compare with.
* @return true if the object passed in matches the subnet mask,
* false otherwise.
*/
public boolean equals (Object p) {
if (p instanceof PrincipalImpl || p instanceof GroupImpl){
if ((super.hashCode() & p.hashCode()) == p.hashCode()) return true;
else return false;
} else {
return false;
}
}
/**
* Returns true if the passed principal is a member of the group.
*
* @param p the principal whose membership is to be checked.
* @return true if the principal is a member of this group, false otherwise.
*/
public boolean isMember(Principal p) {
if ((p.hashCode() & super.hashCode()) == p.hashCode()) return true;
else return false;
}
/**
* Returns an enumeration which contains the subnet mask.
*
* @return an enumeration which contains the subnet mask.
*/
public Enumeration<? extends Principal> members(){
Vector<Principal> v = new Vector<Principal>(1);
v.addElement(this);
return v.elements();
}
/**
* Removes the specified member from the group. (Not implemented)
*
* @param p the principal to remove from this group.
* @return allways return true.
*/
public boolean removeMember(Principal p) {
return true;
}
/**
* Prints a string representation of this group.
*
* @return a string representation of this group.
*/
public String toString() {
return ("GroupImpl :"+super.getAddress().toString());
}
}