org.davesag.generica.util
Class PasswordGenerator

java.lang.Object
  org.davesag.generica.util.PasswordGenerator

public class PasswordGenerator

extends Object

Generates a single use 'random' password based on concatenating a verb and a noun and then transliterating some letters to numbers at random. This is quite suitable for emailing a new password to a user who has forgotten their password, and then requiring that they change their password.

Since:

Generica 1.0

Version:

CVS Revision $Id: PasswordGenerator.java,v 1.8 2004/03/30 13:00:43 davesag Exp $

Author:

Dave Sag http://www.davesag.com

Field Summary

protected static PasswordGenerator	THE_PASS_GEN the singleton password generator
protected static Random	THE_RANDOM the random number generator
protected String[]	theNouns an array of nouns
protected String[]	theVerbs an array of verbs

Constructor Summary

protected

PasswordGenerator() Null constructor.

Method Summary

static String[]	buildWordArray(MessageResources messages, String name) Builds an array of words from a supplied resource and name.
String	generatePassword() Generates a randowm password based on concatanation of a verb, a noun, some numbers and so forth.
static PasswordGenerator	getPasswordGenerator() Gets the default passwrod generator.
static PasswordGenerator	getPasswordGenerator(String resource) Gets a password generator if one has not already been made, using the resources in the path supplied.
Random	getRandom() gets the singleton Random number generator if it exists, or seeds and makes one if not.
void	setNouns(String[] nouns) sets the array of nouns.
void	setVerbs(String[] verbs) sets the array of verbs.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

THE_PASS_GEN

protected static PasswordGenerator THE_PASS_GEN

the singleton password generator

THE_RANDOM

protected static Random THE_RANDOM

the random number generator

theVerbs

protected String[] theVerbs

an array of verbs

theNouns

protected String[] theNouns

an array of nouns

Constructor Detail

PasswordGenerator

protected PasswordGenerator()

Null constructor. Protected because it is a singleton. Use getPasswordGenerator to return an instance of this.

Method Detail

getPasswordGenerator

public static PasswordGenerator getPasswordGenerator()

Gets the default passwrod generator.

Returns:

the default password generator.

getPasswordGenerator

public static PasswordGenerator getPasswordGenerator(String resource)

Gets a password generator if one has not already been made, using the resources in the path supplied.

Parameters:

resource - The fully qualified path to a resource file.

Returns:

The password generator.

setVerbs

public void setVerbs(String[] verbs)

sets the array of verbs.

Parameters:

verbs - The array of verbs.

setNouns

public void setNouns(String[] nouns)

sets the array of nouns.

Parameters:

nouns - The array of nouns.

getRandom

public Random getRandom()

gets the singleton Random number generator if it exists, or seeds and makes one if not.

Returns:

A Random number generator.

generatePassword

public String generatePassword()

Generates a randowm password based on concatanation of a verb, a noun, some numbers and so forth.

Returns:

A shiny new password.

buildWordArray

public static String[] buildWordArray(MessageResources messages,
                                      String name)

Builds an array of words from a supplied resource and name.

Parameters:

messages - The resource file with the words in it.

name - The name of the comma delimited list of words to use.

Returns:

An array of words.