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* 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.security.acl.Permission;
import java.util.Vector;
import java.util.Enumeration;
import java.io.Serializable;
import java.net.UnknownHostException;
import java.security.Principal;
import java.security.acl.AclEntry;
/**
* Represent one entry in the Access Control List (ACL).
* This ACL entry object contains a permission associated with a particular principal.
* (A principal represents an entity such as an individual machine or a group).
*
* @see java.security.acl.AclEntry
*/
class AclEntryImpl implements AclEntry, Serializable {
private static final long serialVersionUID = -5047185131260073216L;
private AclEntryImpl (AclEntryImpl i) throws UnknownHostException {
setPrincipal(i.getPrincipal());
permList = new Vector<Permission>();
commList = new Vector<String>();
for (Enumeration<String> en = i.communities(); en.hasMoreElements();){
addCommunity(en.nextElement());
}
for (Enumeration<Permission> en = i.permissions(); en.hasMoreElements();){
addPermission(en.nextElement());
}
if (i.isNegative()) setNegativePermissions();
}
/**
* Contructs an empty ACL entry.
*/
public AclEntryImpl (){
princ = null;
permList = new Vector<Permission>();
commList = new Vector<String>();
}
/**
* Constructs an ACL entry with a specified principal.
*
* @param p the principal to be set for this entry.
*/
public AclEntryImpl (Principal p) throws UnknownHostException {
princ = p;
permList = new Vector<Permission>();
commList = new Vector<String>();
}
/**
* Clones this ACL entry.
*
* @return a clone of this ACL entry.
*/
public Object clone() {
AclEntryImpl i;
try {
i = new AclEntryImpl(this);
}catch (UnknownHostException e) {
i = null;
}
return (Object) i;
}
/**
* Returns true if this is a negative ACL entry (one denying the associated principal
* the set of permissions in the entry), false otherwise.
*
* @return true if this is a negative ACL entry, false if it's not.
*/
public boolean isNegative(){
return neg;
}
/**
* Adds the specified permission to this ACL entry. Note: An entry can
* have multiple permissions.
*
* @param perm the permission to be associated with the principal in this
* entry
* @return true if the permission is removed, false if the permission was
* not part of this entry's permission set.
*
*/
public boolean addPermission(java.security.acl.Permission perm){
if (permList.contains(perm)) return false;
permList.addElement(perm);
return true;
}
/**
* Removes the specified permission from this ACL entry.
*
* @param perm the permission to be removed from this entry.
* @return true if the permission is removed, false if the permission
* was not part of this entry's permission set.
*/
public boolean removePermission(java.security.acl.Permission perm){
if (!permList.contains(perm)) return false;
permList.removeElement(perm);
return true;
}
/**
* Checks if the specified permission is part of the permission set in
* this entry.
*
* @param perm the permission to be checked for.
* @return true if the permission is part of the permission set in this
* entry, false otherwise.
*/
public boolean checkPermission(java.security.acl.Permission perm){
return (permList.contains(perm));
}
/**
* Returns an enumeration of the permissions in this ACL entry.
*
* @return an enumeration of the permissions in this ACL entry.
*/
public Enumeration<Permission> permissions(){
return permList.elements();
}
/**
* Sets this ACL entry to be a negative one. That is, the associated principal
* (e.g., a user or a group) will be denied the permission set specified in the
* entry. Note: ACL entries are by default positive. An entry becomes a negative
* entry only if this setNegativePermissions method is called on it.
*
* Not Implemented.
*/
public void setNegativePermissions(){
neg = true;
}
/**
* Returns the principal for which permissions are granted or denied by this ACL
* entry. Returns null if there is no principal set for this entry yet.
*
* @return the principal associated with this entry.
*/
public Principal getPrincipal(){
return princ;
}
/**
* Specifies the principal for which permissions are granted or denied by
* this ACL entry. If a principal was already set for this ACL entry,
* false is returned, otherwise true is returned.
*
* @param p the principal to be set for this entry.
* @return true if the principal is set, false if there was already a
* principal set for this entry.
*/
public boolean setPrincipal(Principal p) {
if (princ != null )
return false;
princ = p;
return true;
}
/**
* Returns a string representation of the contents of this ACL entry.
*
* @return a string representation of the contents.
*/
public String toString(){
return "AclEntry:"+princ.toString();
}
/**
* Returns an enumeration of the communities in this ACL entry.
*
* @return an enumeration of the communities in this ACL entry.
*/
public Enumeration<String> communities(){
return commList.elements();
}
/**
* Adds the specified community to this ACL entry. Note: An entry can
* have multiple communities.
*
* @param comm the community to be associated with the principal
* in this entry.
* @return true if the community was added, false if the community was
* already part of this entry's community set.
*/
public boolean addCommunity(String comm){
if (commList.contains(comm)) return false;
commList.addElement(comm);
return true;
}
/**
* Removes the specified community from this ACL entry.
*
* @param comm the community to be removed from this entry.
* @return true if the community is removed, false if the community was
* not part of this entry's community set.
*/
public boolean removeCommunity(String comm){
if (!commList.contains(comm)) return false;
commList.removeElement(comm);
return true;
}
/**
* Checks if the specified community is part of the community set in this
* entry.
*
* @param comm the community to be checked for.
* @return true if the community is part of the community set in this
* entry, false otherwise.
*/
public boolean checkCommunity(String comm){
return (commList.contains(comm));
}
private Principal princ = null;
private boolean neg = false;
private Vector<Permission> permList = null;
private Vector<String> commList = null;
}