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package com.sun.jmx.snmp.IPAcl;
import java.util.Vector;
import java.io.Serializable;
import java.security.Principal;
import java.security.acl.Owner;
import java.security.acl.LastOwnerException;
import java.security.acl.NotOwnerException;
Owner of Access Control Lists (ACLs).
The initial owner Principal should be specified as an
argument to the constructor of the class AclImpl.
See Also: - Owner
/**
* Owner of Access Control Lists (ACLs).
* The initial owner Principal should be specified as an
* argument to the constructor of the class AclImpl.
*
* @see java.security.acl.Owner
*/
class OwnerImpl implements Owner, Serializable {
private static final long serialVersionUID = -576066072046319874L;
private Vector<Principal> ownerList = null;
Constructs an empty list of owner.
/**
* Constructs an empty list of owner.
*/
public OwnerImpl (){
ownerList = new Vector<Principal>();
}
Constructs a list of owner with the specified principal as first element.
Params: - owner – the principal added to the owner list.
/**
* Constructs a list of owner with the specified principal as first element.
*
* @param owner the principal added to the owner list.
*/
public OwnerImpl (PrincipalImpl owner){
ownerList = new Vector<Principal>();
ownerList.addElement(owner);
}
Adds an owner. Only owners can modify ACL contents. The caller principal
must be an owner of the ACL in order to invoke this method. That is, only
an owner can add another owner. The initial owner is configured at
ACL construction time.
Params: - caller – the principal invoking this method.
It must be an owner of the ACL.
- owner – the owner that should be added to the list of owners.
Throws: - NotOwnerException – if the caller principal is not an owner
of the ACL.
Returns: true if successful, false if owner is already an owner.
/**
* Adds an owner. Only owners can modify ACL contents. The caller principal
* must be an owner of the ACL in order to invoke this method. That is, only
* an owner can add another owner. The initial owner is configured at
* ACL construction time.
*
* @param caller the principal invoking this method.
* It must be an owner of the ACL.
* @param owner the owner that should be added to the list of owners.
* @return true if successful, false if owner is already an owner.
* @exception NotOwnerException if the caller principal is not an owner
* of the ACL.
*/
public boolean addOwner(Principal caller, Principal owner)
throws NotOwnerException {
if (!ownerList.contains(caller))
throw new NotOwnerException();
if (ownerList.contains(owner)) {
return false;
} else {
ownerList.addElement(owner);
return true;
}
}
Deletes an owner. If this is the last owner in the ACL, an exception is raised.
The caller principal must be an owner of the ACL in order to invoke this method.
Params: - caller – the principal invoking this method. It must be an owner
of the ACL.
- owner – the owner to be removed from the list of owners.
Throws: - NotOwnerException – if the caller principal is not an owner
of the ACL.
- LastOwnerException – if there is only one owner left, so that
deleteOwner would leave the ACL owner-less.
Returns: true if successful, false if owner is already an owner.
/**
* Deletes an owner. If this is the last owner in the ACL, an exception is raised.
*<P>
* The caller principal must be an owner of the ACL in order to invoke this method.
*
* @param caller the principal invoking this method. It must be an owner
* of the ACL.
* @param owner the owner to be removed from the list of owners.
* @return true if successful, false if owner is already an owner.
* @exception NotOwnerException if the caller principal is not an owner
* of the ACL.
* @exception LastOwnerException if there is only one owner left, so that
* deleteOwner would leave the ACL owner-less.
*/
public boolean deleteOwner(Principal caller, Principal owner)
throws NotOwnerException,LastOwnerException {
if (!ownerList.contains(caller))
throw new NotOwnerException();
if (!ownerList.contains(owner)){
return false;
} else {
if (ownerList.size() == 1)
throw new LastOwnerException();
ownerList.removeElement(owner);
return true;
}
}
Returns true if the given principal is an owner of the ACL.
Params: - owner – the principal to be checked to determine whether or
not it is an owner.
Returns: true if the given principal is an owner of the ACL.
/**
* Returns true if the given principal is an owner of the ACL.
*
* @param owner the principal to be checked to determine whether or
* not it is an owner.
* @return true if the given principal is an owner of the ACL.
*/
public boolean isOwner(Principal owner){
return ownerList.contains(owner);
}
}