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Class jnfs.UserTable 

java.lang.Object
   |
   +----jnfs.UserTable
public class UserTable
extends Object
implements Serializable
The user table is a public key ring for the users of the file system. It may be written out to secondary storage using save() for persistence.

Version:
$Id: UserTable.java,v 1.4 1997/05/20 17:59:39 mjr Exp $
Author:
Michael John Radwin

Variable Index

o DEFAULT_TAB_FILE
The default filename to use for save() and load().

Constructor Index

o UserTable()
Contructs an empty user table.

Method Index

o get(String)
Gets this user from the user table.
o getUsernames()
Returns an enumeration of Strings representing the names of FileSystemUsers in the table.
o getUsers()
Returns an enumeration of all FileSystemUsers in the table.
o load()
Loads the user information from secondary storage.
o load(String)
Loads the user information from secondary storage.
o put(FileSystemUser)
Adds this user to the user table.
o remove(FileSystemUser)
Removes this user from the user table.
o remove(String)
Removes this user from the user table.
o save()
Forces the user information to be written to secondary storage.
o save(String)
Forces the user information to be written to secondary storage.
o toString()
Returns a string representation of this object.

Variables

o DEFAULT_TAB_FILE 
 public static final String DEFAULT_TAB_FILE
The default filename to use for save() and load().

Constructors

o UserTable 
 public UserTable()
Contructs an empty user table.

Methods

o getUsers 
 public Enumeration getUsers()
Returns an enumeration of all FileSystemUsers in the table.

o getUsernames 
 public Enumeration getUsernames()
Returns an enumeration of Strings representing the names of FileSystemUsers in the table.

o put 
 public void put(FileSystemUser u)
Adds this user to the user table.

o get 
 public FileSystemUser get(String username)
Gets this user from the user table.

Returns:
the user if it is found; otherwise null.
o remove 
 public boolean remove(FileSystemUser u)
Removes this user from the user table.

Returns:
true if the user was found and successfully removed; false otherwise.
o remove 
 public boolean remove(String username)
Removes this user from the user table.

Returns:
true if the user was found and successfully removed; false otherwise.
o toString 
 public String toString()
Returns a string representation of this object.

Overrides:
toString in class Object
o save 
 public boolean save()
Forces the user information to be written to secondary storage.

o save 
 public synchronized boolean save(String filename)
Forces the user information to be written to secondary storage.

o load 
 public static UserTable load()
Loads the user information from secondary storage.

o load 
 public static UserTable load(String filename)
Loads the user information from secondary storage. 

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